Georgia Fiero Club Forum

All Things Fiero => Tech Tips, Tech Questions => Topic started by: GTRS Fiero on October 15, 2017, 07:08:57 pm

Title: My Misc Fiero issues
Post by: GTRS Fiero on October 15, 2017, 07:08:57 pm
 Issue 1:
The engine is running very rough.  No power.  I suspect it's running rich and fouled the plugs.  I'll pull the back plugs later.  Injector fuses look good.

Issue 2:
The RKE is intermittent.  No idea.  Suspect wiring.  Sometimes lock works, but not unlock, or vise versa.

Issue 3:
The upper courtesy lights work, but not the lower courtesy lights.

Issue 4:
The adapter apparently makes the speedo whacko.  When starting the engine in park, the speedo surges to 50, as if connected to test circuit.

Issue 5:
The oil pressure gauge can read correctly, but often points to the bottom right corner.  Sometimes it jumps around

Issue 6:
The tach jumps all over, although it can be correct.

Issue 7:
The temp gauge can read correctly, but usually reads hot.  Sometimes it jumps around.

I had verified gauge accuracy against the computer last year.  It's hard for me to believe that all my gauges suddenly went bad.

Issue 8:
The transmission upshifts when you depress the accelerator, resulting in less power, rather than more.  I also think it shifts a bit early.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 15, 2017, 08:30:54 pm
After letting the Fiero sit for a bit, I pulled the back plugs.  They are supposed to be new, but are rusty.  They aren't fouled.  I put the plugs back in, reseated a few plug wires at the coil pack, and the engine fired up and ran without stumbling.  I didn't try driving it, though.

That brings me to more issues.

Issue 9:
The radio is now showing gibberish on the display.

The trunk light and 1 lower courtesy bulb are missing.  I wonder what that would affect.


Issue 10:
The idle is sometimes about 600 RPM; other times, about 1,600 RPM.

If the ECU was expecting pintle injectors, and I have multitec, what happens?
Title: Re: Misc Fiero issues
Post by: TopNotch on October 15, 2017, 08:38:51 pm
Some of your symptoms could be caused by bad grounds.
The disk-type injectors can cause a rich mixture.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 15, 2017, 08:58:43 pm
Yeah, I'm suspecting that is one of the problems.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 16, 2017, 02:29:08 pm
I tried driving the Fiero today.  Ran terribly.  Didn't get anywhere.  The radio worked again.

Issue 11:
When I was driving it, there was a screeching sound, apparently from the rear.  The original thought was that it was the dust shields, but it can change sides of the car if going around sharp turns in opposite directions.  Or, simply turning the steering sharply back and forth can change sides of the car from which the sound emnates.

Issue 12:
The check engine light NEVER comes on.  Not when the ignition key is turned to ON, and not when the EGR is unplugged.

Issue 13:
I've got an oil leak, as in a puddle under the Fiero.  I'm also almost 1.5 quarts low, after driving 200 miles.  The oil filler cap is loose, and it leaks a bit there, and the valve cover appears to be leaking at the gasket.  The bolts are tight.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 16, 2017, 04:27:54 pm
What are those plastic strips under the headlight doors that the headlight buckets slide against?

Anyone know where to get those foam pads that set in the cowl area that the hood rests on from?

What are those pads on the bottom of the hood called?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 16, 2017, 05:06:49 pm
Issue 14:
Several vacuum lines that go nowhere.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 16, 2017, 05:14:12 pm
The screeching when side force is applied to the suspension can still be the dust shields. 

The strips on the bottom of the headlight doors are Teflon or Nylon.  How many do you need?

Which foam pads?  The hood doesn't rest on any foam pads.  There are two short pieces of weatherstrip, one on each end of the cowl, that helps to direct water down the side drain channel.  They probably have other purposes, too, like keeping debris from blocking the drain channel between the top of the fender and the side of the front compartment seal. 

On sunroof equipped cars, the sunroof storage support shelf has 2 foam pads and the ones that are mounted on the hood are to keep the sunroof from bouncing around on rough roads.  The sunroof is sandwiched between the flat ones and the round ones. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 16, 2017, 05:21:56 pm
If you have them, 2 strips, but how do the remnants of the old ones come out?

You are right about the pads.  The flat ones are missing a corner, and the round ones are falling off.  I guess I could reglue the round ones.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 16, 2017, 06:38:50 pm
The sunroof pads can be held in place by some acrylic body molding tape.  You won't have to worry about them ever coming loose.  It's the stuff like the quarter windows are held on with. 

Hook your fingernail under the edge of the headlight door strips.  They will buckle and come right out.  What's wrong with yours?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 16, 2017, 08:37:30 pm
1 strip is missing; another is broken in half.  The broken one doesn't seem to want to come out.  I didn't want to break it.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 17, 2017, 06:45:59 pm
Looking back through my trip, I sent texts after filling up to show average MPG.  The last time I filled up, it was at a Philips 66.  I sent the text.  About 20 minutes later, the issues started.

My thought is either bad fuel or water in the fuel.  The station was along a major highway.

Anyway, I added some HEET, mixed it up, and ran the engine for 20 minutes.  No change.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 17, 2017, 08:31:37 pm
Issue 15:
The ground strap from the decklid is broken.

Issue 16:
The cable for the cruise control is broken.

Issue 17:
The left axle boot is leaking and has thrown grease all over.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 17, 2017, 09:00:41 pm
I never knew that axle grease was this greenish color:


And my powdercoat is peeling:
Title: Re: Misc Fiero issues
Post by: Fierofool on October 17, 2017, 09:33:48 pm
There's also a heavy ground wire that bolts to the lower frame rail on the driver's side, down below the air filter and the other end bolts to a transmission to engine bolt. 

The CV grease is usually some shade of green and all I've dealt with stinks horribly. 

When you get the car back home, you may need to contact OleJoeDad and let he and Brian straighten out the car.  I would hope that you could get some money refunded from the person who had your car without having to go back to Texas to pursue it.  I won't use the term "Did the work" or "Fixed your car". 

I've got to go dig up those headlight door strips. 
Title: Re: Misc Fiero issues
Post by: TopNotch on October 17, 2017, 09:48:45 pm
It seems to me that you could get headlight doors from any junk yard Fiero for the strips. A Fiero stripped of practically everything else will probably still have headlight doors. ;)
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 17, 2017, 09:57:40 pm
I'll have to go back to Texas.

I'll check on the other ground wire.

This guy came highly recommended, believe it or not.  Several people recommended him.

The car is home.  I believe I'm being objective about this.

The car was left outside in the weather, which destroyed much of the "nice" of the car, and hundreds of hours and $ I'd spent on it.  Here's what I believe that the car needs to fix it:
1. Ground strap, new injectors, new plugs
2. Wiring fixed
3. Bulbs put back in
4. Wiring fixed
5. Wiring fixed
6. Wiring fixed
7. Wiring fixed
8. Transmission adjusted
9. Wiring fixed
10. Grounds fixed, ECU reprogram
11. Dust shields adjusted
12. Wiring fixed
13. Valve cover gasket replaced
14. Old vacuum lines removed
15. Ground straps repaired
16. Cruise cable repaired
17. Axle boot replaced
18. Vacuum lines fixed


It also needs a lot of cosmetic work, including the power-coat on the intake done for a third time.

I'm going to treat the rust that has appeared under the battery, and on the exhaust.  I'll replace all the rusty bolts and nuts I see (basically, everything on the engine).  I'll remove the old vacuum line.  I'll fix the radio knob and the shift cover.  I've cleaned up about a trash bag of leave and other debris.  I have a bin of nuts and bolts and little round seals that have no home.  We'll see what else I can get done without the code enforcement gestapo harassing me.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 17, 2017, 10:08:48 pm
It seems to me that you could get headlight doors from any junk yard Fiero for the strips. A Fiero stripped of practically everything else will probably still have headlight doors. ;)

While that may be true, there first must be a Fiero in the junkyard, and second my wife would have to take off work to watch the kids.  Kids under 18 are not allowed at the junkyards, and for good reason.  My kids are basically always with me when I'm off work, and often when I am at work.  I was last able to go, back in 2014, because my wife was off and watched the kids.  Time off must be requested weeks in advance.  I don't know of any way to plan when a Fiero will arrive.

Fieros that are brought in one day are often crushed the next day.  There were several Fieros that were driven into the junkyard, and were crushed the next day.  Regardless, they are parked at the corner by the crusher, and the fronts are usually destroyed by the equipment driving over them.  You can see the Fieros from the street, because they are in the front row.  The last time I saw a Fiero there, they had picked it up with some sort of claw thing, and holes were punched into the doors, as a result.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 17, 2017, 11:52:40 pm
I found a ground wire for the coil pack.  I found the torn ground strap on the decklid hinge.  I didn't find any other ground straps going to the engine.  I'm not saying that there aren't any, just that I can't see or feel them from the top.  He said there are 2-3 on the block under the intake.

I did find the O2 sensor wire laying on the exhaust.  Also, there is a rubber hose from the intake that connects to nothing, although it seems to have had a clamp on it, but it was also laying on the exhaust.

While I was in there, I had the engine running, and felt exhaust leaks coming from the manifolds, the crossover, and the EGR.

The throttle cable is kinked to the point that it catches sometimes.

There is a port on the throttle body where apparently the coolant used to connect, but there is nothing on the end of it.  It just sticks out.
Title: Re: Misc Fiero issues
Post by: TopNotch on October 18, 2017, 08:24:38 am
There is a port on the throttle body where apparently the coolant used to connect, but there is nothing on the end of it.  It just sticks out.

A lot of people disconnect this coolant line. I think it is to prevent icing in the throttle body, but if you don't live up north, it's probably not needed.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 18, 2017, 09:06:58 am
Even people living further north have reported no issues with removing the throttle body coolant lines.  Just to dress it up, some have removed the complete fitting and inserted a brass plug into the throttle body.  It really isn't necessary as it's only a pass through to the other line and doesn't allow anything into the air intake area. 
Title: Re: Misc Fiero issues
Post by: Raydar on October 18, 2017, 11:18:03 am
Dare I ask who did the work?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 06:34:59 pm
The Fiero world is a small one.  I have to believe some of you have met this person.  I'm not going to throw him under the bus.

To put this in perspective, yes, I'm pissed, but no one takes the came care for your stuff as you do.  There are a lot of problems, yes, but they are all fixable, and I think it's close.  He is willing to fix the problems.

My problems are several.  I have to get my Fiero back to Texas for him to fix it.  I'm loathe to leave it there.  Texas isn't exactly close. Basically, 29 hours, round trip, just in drive time for me by myself.  What else may happen?  I have my kids, which makes the trip more difficult, because I can't really expect them to sit and watch car work for hours.  I can't leave them, can't really bring them.  Getting off work is difficult.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 09:10:25 pm
Well, I plugged the hose from the intake into the transmission.  Still have a blue cloud (oil) coming out the exhaust.  I'm sure this is destroying my cat, so I don't really want to run it.  Probably not good for the muffler, either.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 18, 2017, 09:42:37 pm
I didn't know the Fiero had a hose from the trans to the intake.  The only vacuum hose that leaves the engine are the vapor canister, the cruise, and the brake booster. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 09:47:11 pm
Well, this hose goes from the intake near where the distributor would sit to a port on the front of the transmission, down by the O2 sensor.  This is an automatic.  I'm sure manuals are different.

It would seem that this hose being off would cause shifting issues, probably early shifts, and certainly the idle would be higher, but the air coming through that tube isn't filtered.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 09:54:06 pm
This hose, from here:


to here:
Title: Re: Misc Fiero issues
Post by: Fierofool on October 18, 2017, 10:07:24 pm
That manifold port normally has a line that passes back underneath the intake and is part of the two line connection at the other end of the manifold near the MAP sensor.  It goes to a rubber line that attaches to the metal line on the trunk wall and is routed around the engine compartment to the fuel vapor canister.  I forgot that you have an upgraded transmission.  If that vacuum dashpot is leaking, you're probably sucking transmission fluid into the intake.  You're right that it's not good for the O-2 sensor or the catalytic converter.  That transmission vacuum line could be tapped in somewhere else so as not to eliminate the vapor purge. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 10:11:49 pm
There was no fluid in that line.

It seems to just be engine oil that I'm burning.  Transmission fluid smells differently.

That's the vapor purge on the transmission?  Meaning that it sometimes expels fluids?
Title: Re: Misc Fiero issues
Post by: Fierofool on October 18, 2017, 10:18:01 pm
It's the fuel vapor purge for a stock Fiero.  Found a diagram.  You can see how that line's supposed to run.  It's the small line marked 'to intake manifold'.

Title: Re: Misc Fiero issues
Post by: f85gtron on October 18, 2017, 10:21:24 pm
Can i chime in?
That's probably a kick down dash pot. It probably modulates a rod that mechanically flips a valve to make the trans hold a gear longer or kick down when vacuum is gone.  Old school.
We used to (and still do) use trans fluid to clean top end by pouring slowly into carbs.  Works like a charm. So if that's what is (probably not) being sucked into the intake, then your valves are probably VERY clean by now!

Also, if you want something done right, do it yourself. I learned it the hard way.
Ron
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 10:23:30 pm
So that line needs to end up connected to the vapor canister?
Title: Re: Misc Fiero issues
Post by: f85gtron on October 18, 2017, 10:30:28 pm
Depends on what's the canister connected to now?  Trace the two lines from the canister, then post there positions. The canister line should be at a ported connection for one, and a regular vacuum for the other.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 10:40:30 pm
Can i chime in?
That's probably a kick down dash pot. It probably modulates a rod that mechanically flips a valve to make the trans hold a gear longer or kick down when vacuum is gone.  Old school.
We used to (and still do) use trans fluid to clean top end by pouring slowly into carbs.  Works like a charm. So if that's what is (probably not) being sucked into the intake, then your valves are probably VERY clean by now!

Also, if you want something done right, do it yourself. I learned it the hard way.
Ron

By all means, chime in!  I'm the novice.

It's hard to do something myself.  My brothers don't have the time to help, and I don't have the knowledge or tools.  Also, the gestapo cite me for every little thing.  I was actually cleaning the Fiero, but I brought out the bucket of water and put it between my Fiero and the street.  I laid the hose nearby, and lots of cleaning things.  I still got a citation.  I'll get out of it, but it requires my going to court, which is a 3-hour waste of time, just waiting my turn.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 10:45:26 pm
The big one goes down, then toward the firewall, then makes a right turn and goes somewhere.  Probably something with the fuel system.

The 2 smaller ones go to a Y, then to the hard line that goes against the trunk wall, then to a hose, back to a hard line that goes under the intake and connects to an elbow on the throttle body.  This goes all the way around the trunk through soft and hard lines of different sizes to end up about 16 inches from where it started.
Title: Re: Misc Fiero issues
Post by: f85gtron on October 18, 2017, 10:45:54 pm
Geez! No wonder people in Missouri like to riot! 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2017, 11:00:31 pm
Geez! No wonder people in Missouri like to riot!

That's one way of looking at it.  I have yet to see a justified riot here, or one that didn't violate the very things the rioters were supposedly rioting against.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 23, 2017, 06:07:00 pm
Ok, so here's some questions for the gurus.

If I just had the following problems corrected, how much would it cost/difficulty?
1. Valves that may be damaged, off lifters, or out of adjustment
2. Exhaust leaks at manifold gaskets, Y-pipe, and EGR valve
3. Grounds for RKE and gauges
4. Ground straps for engine
5. Replace injectors and spark plugs

Should this be hundreds, thousands, ...?
Title: Re: Misc Fiero issues
Post by: TopNotch on October 23, 2017, 06:19:08 pm
It depends on whether you do the work yourself or not.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 23, 2017, 06:27:38 pm
No can do.  I don't have the space, tools, or freedom.  I've already received 3 citations, and I was mainly just cleaning the car.  Think soapy water and vacuum.  One citation was because I was taking the old stuff out of the Fiero and putting those parts into a bucket, which is an ”unapproved container”.  It was the distributor shaft, the coil, tach filter, some brackets, etc.  I didn't have a single tool out.

Obviously, I'm not comfortable enough with the work, either.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 23, 2017, 09:37:32 pm
Off topic.
Title: Re: Misc Fiero issues
Post by: f85gtron on October 24, 2017, 08:53:31 am
Sounds like it's time to move.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 25, 2017, 05:24:19 am
This has gotten WAY off topic.  My fault.

I moved the other comments here (http://www.gafieroclub.org/bbs/index.php?topic=2914.msg27342#msg27342)
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 25, 2017, 06:43:25 am
If I have the Fiero oil pan, and the Fiero dipstick, why wouldn't the FULL mark be accurate?
Title: Re: Misc Fiero issues
Post by: Fierofool on October 25, 2017, 07:27:49 am
Are you positive it's the Fiero pan?  It won't fit a 3.4 without modifying the baffles inside.  When you have an opportunity to look underneath, see if there's a sensor in the front side of the pan, somewhere between the filter and starter.  It will be a low oil sensor that was used on the 3.4 pans. 

When the 3.4 pan is used, the oil level reading will indicate high when the engine has 4.5 quarts.  For that reason, Rodney makes a spacer that slides onto the dipstick and resides underneath the small metal cap.  It raises the dipstick to the proper level. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 25, 2017, 07:45:01 am
Originally, I thought he said he used the 3.4 pan, but he said it was the 2.8 at pickup, because the 3.4 baffles would have to be modified.  Made no sense.  I asked why not then use the 3.4 stick, but he said it'd be off, also.

Sounds as if I just need the spacer.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 25, 2017, 11:11:11 am
The 3.4 stick is much longer than the 2.8.  Can't use the 3.4 tube because it's routed differently.  If a 3.4 pump and pickup is used, logic will tell you no modification is needed to fit an oil pan that was designed for that pump and pickup.  I've never heard of anyone using a 2.8 pump and pickup on a 3.4, but if so, it might require modifying the baffles.  The 2.8 pump is a lower volume pump, too. 
Title: Re: Misc Fiero issues
Post by: Fierofool on October 25, 2017, 11:18:58 am
Haven't forgotten about your headlight door issue.  I don't know what I did with the strips I had.  I can't find them.  I don't know if I put them in a box with something else, or if they're in my shed or up in the storage building. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 25, 2017, 05:39:05 pm
No worries.  I have a lot of fixing up to do on my Fiero.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 26, 2017, 07:09:36 pm
Shouldn't there be a gasket between the EGR mount block and the flange on the exhaust?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 26, 2017, 07:11:59 pm
I tightened 2 loose bolts on the front valve cover.

The clamps on the intake hose weren't tight at all.

I thought there should be a thick ground wire going to the engine block, not just 2 little wires.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 26, 2017, 08:27:02 pm
There should be a gasket between the egr block and the manifold.  Apparently the only source is The Fiero Store. 

Look just above the select cable bracket on the left.  You can see a threaded stud on the lower frame rail with a wire bolted to it.  That wire should go to one of the main transmission housing bolts.  It appears to be broken in this photo.  The broken end has a large eyelet for the transmission to engine bolt.  You can buy the regular bare braided ground straps in varying lengths and attach them between the cradle and engine, cradle an body, and the engine and body.  Grounds never hurt unless you attach them to a positive wire. :)

Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 26, 2017, 08:54:29 pm
I'm disoriented in this pic, or something.  I thought this was the left (driver) side of the car.  I see what looks like the Y-pipe going down.  I see the frame rail.  What looks like a hose must be the ground cable, but it appears to go over to the exhaust and connect to nothing.

I looked at my Fiero on the left frame rail.  No ground cable anywhere that I could see or reach.  No bolt hole, either.  The only thing on the frame rail is some sort of line.  A brand new line.  Not sure where it goes.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 26, 2017, 09:19:18 pm
This is the left side of the car, looking down while standing behind the car.  Manual transmission car.  The exhaust is the down pipe end of the Y pipe, where it connects before the catalytic converter.  The 2 silver pipes are AC pipes.  The dark pipe is the coolant crossover pipe. 

The wire doesn't connect to the exhaust.  Being 2 dimensional, there's no real depth.  It looks like the wire is curled, but on my car, it's long enough to connect to the transmission mounting bolt/stud.  Automatics might have the wire located elsewhere. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 26, 2017, 09:56:06 pm
I'm not seeing how all this can be fixed without dropping the cradle and tearing the engine back down again.
I don't know for sure, but I have a suspicion that that messes with the alignment.

I think the EGR adapter will have to be replaced

Up by the spare tire, there are 2 bolts with big plastic heads on them.  One goes through the jack, I think, but the other one is shorter.  Where does it go?
Title: Re: Misc Fiero issues
Post by: Fierofool on October 26, 2017, 10:10:52 pm
The whole cradle can be dropped without affecting alignment if you loosen the struts at the top of the towers. 

Why does the EGR base or adapter need to be replaced?

The short bolt is what holds the metal bar that spare tire in place.  One of the bar has a flat head that fits into a slotted bracket.  The other end of the bar has a loop.  The loop and hold down bolt goes to the passenger side, just below the side of the jack. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 26, 2017, 10:33:03 pm
One of the holes is stripped on the EGR adapter.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 26, 2017, 11:26:16 pm
It can be heli-coiled.  We actually had one run done with heli-coils.  The wrong drill bit was used and it was oversize for tapping, so heli-coils of the right size and thread were installed. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 26, 2017, 11:27:46 pm
I'd rather not.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 27, 2017, 05:53:19 pm
I've come up with a total of 34 issues.  There was a lot of work done, and I understand that there cab be bugs/kinks to work out.  A few things were just sloppy oversights.  Usually, when I think of bugs and kings, I figure fine-tuning, maybe the issues with the gauges being a bit wacko.

I'm not sure what the problems are, but he thinks this is a 15-hour job to fix.  Maybe.  I think that's optimistic, at this point, but perhaps with a good game plan and working together...I still doubt it.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 28, 2017, 06:03:36 pm
How do you deal with rust on the exhaust flanges, for example the manifolds, Y-pipe, and downpipe to the catalytic converter?

Someone made the suggestion of CLR.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 28, 2017, 07:11:25 pm
Ceramic coating should work.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 28, 2017, 08:28:59 pm
I meant how to get rid of the rust.  Isn't the ceramic coating for after the rust is gone?
Title: Re: Misc Fiero issues
Post by: Fierofool on October 28, 2017, 10:39:23 pm
CLR can etch and stain aluminum.  Bead blasting would work if things were off the car.  Once clean they could be coated.  I don't know how ceramic is applied or cured.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 29, 2017, 08:18:01 am
The exhaust and block aren't aluminum.  Should CLR work OK on them?
Title: Re: Misc Fiero issues
Post by: Fierofool on October 29, 2017, 08:38:51 am
It probably would, but I was thinking of the splash and runoff onto the transmission case or possibly the polished areas of the valve covers.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 29, 2017, 08:43:42 am
Hmmm.  Lots of masking.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 01, 2017, 06:45:20 pm
I'm thinking my pistons, rings and cylinders are OK, because the oil is clear, basically with a slight yellow tint.  The PCV is clean and dry, so not blowing oil back through it.  That leaves the valves, valve guides and seals.  I'm not sure how this would affect the engine.

It seams that, out of gear, the rev limiter kicks in a bit above 4K RPM, but it'll run to 4K in gear.

The lowest thing on the bottom of the engine is the oil pan, right?  It seems mine is still the 2.8 oil pan.  Odd.

The entire intake, the valve covers, the fuel rail, the thermostat housing, and some vacuum hoses must all come off, because there is a spot above the water pump that didn't get painted well and is rusty already.

The upper intake needs to be recoated, anyway.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 01, 2017, 07:28:25 pm
If you can avoid it, don't remove the thermostat housing.  There's been lots of reports of great difficulty in stopping leaks after having done that. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 01, 2017, 07:53:13 pm
It was already removed previously, but good to know.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 03, 2017, 05:40:38 pm
Haven't forgotten about your headlight door issue.  I don't know what I did with the strips I had.  I can't find them.  I don't know if I put them in a box with something else, or if they're in my shed or up in the storage building.

I received the strips.  They look great.  Thanks, Fierofool!

Here's the left side before Fierofool:

You can see that the bottom is broken, but it doesn't want to come out.  I don't know what happened to around the strip.

Here's the right side before Fierofool:

Notice that the strip is missing entirely.  You can sortof see what the problem is, in this picture.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 03, 2017, 05:41:05 pm
Here's why the strips didn't want to come out:

This glue has great adhesion, and equally good cohesion.  I had to scrape this gunk out of the slots into which the strips fit. I had a really hard time getting the left strip to fit into the lower slot.  I have no idea how the strips came out, with this glue.

Left side strip, after Fierofool:

The strip is sitting flat, no matter how it looks.

Right side strip, after Fierofool:


The new strips actually look better than my originals.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 03, 2017, 05:42:45 pm
Unfortunately, while I was in there, I discovered that 2 of the retainers for the rubber piece over the radiator were not in place.  One was under the rubber cover, and the top of the other is broken off.  I then saw that the bracket on the left side is missing a bolt.  Rrrr!
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 04, 2017, 03:15:32 pm
Well, I fixed the radio knob.  A bit of superglue, and it was ready to test:


With a little effort, the knob slipped right on.  It turns well, with no looseness.  Nice and straight.

I have mixed feelings about adding some epoxy or something around the inner plastic that was broken, to prevent future failures.  What do you think?




Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 04, 2017, 03:20:05 pm
I don't remember if I mentioned it or not, but when I got the car back, the left ash tray door wouldn't close.  I found that this was due to the white plate that holds the shift light and gear indicator having been glued in a hair too far to the left.  See where the tip of the screwdriver is?


I carefully removed this plate, and reglued.  The ash tray door does close correctly, now.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 04, 2017, 03:26:27 pm
The bigger issue was that the right rear corner of the frame for the shift boot was broken off.

I wasn't very careful when gluing, being more concerned with not getting the glue where it would cause issues with the gear selector, or the aforementioned white plate, and I didn't get the corner flat and level. :(

It looked passable there, and I didn't realize my mistake until I took the next picture.



And even worse here.  I have no idea how I missed this while gluing.


Moment of truth:

And it held!  Note that, after the initial gluing, once the piece was in place, I added more superglue, both above and below to both connection points.  You'd figure that there would be more than just those two tiny connection points.  Oh, well.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 08, 2017, 07:12:03 am
It occurs to me that my Fiero wasn't steadily burning oil, until I connected that vacuum hose to the port on the transmission.  Does that help narrow the problem?  Originally, it was just a puff of smoke on startup.

I'm considering disconnecting that vacuum hose and seeing if it smokes with the vacuum leak.
Title: Re: Misc Fiero issues
Post by: Raydar on November 08, 2017, 06:07:22 pm
The vacuum modulator may be shot. If the diaphragm is ruptured, it will usually suck transmission fluid through the vacuum line. It will smoke like hell at idle (high vacuum) and diminish a bit, at speed.
This could easily explain your "strange shift" problem.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 08, 2017, 07:07:00 pm
Hmmm.  Could I put my finger over it to test?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 08, 2017, 07:26:09 pm
Well, I pulled the hose.  Couldn't tell about the smoke.  Only ran it for 10 seconds.  First start since 10/18.

I'd forgotten about the hunting idle issue.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 10, 2017, 05:07:09 pm
Any likelihood that this could be causing my current issues?

Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 14, 2017, 03:02:26 pm
Disassembled to the heads.  Lots of loose bolts.  Found a broken pushrod.  All the valves were loose and out of adjustment.  Haven't found the pushrod end, so far.  Hoping it'll be in the oil pan.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 15, 2017, 11:32:28 am
Found the pushrod end in the head.  The new pushrods and plugs are in.  The valves are adjusted, and timing is set.  Runs very quietly, even with the exhaust leaks.

Went for a drive.  Still seems to be in the wrong gear a lot, but doesn't fall on its face.  It dies, because of the exhaust leaks, which probably contribute to the surging idle.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 15, 2017, 06:09:48 pm
I drove my Fiero about 35 miles today.  Maybe I'm paranoid, but it seems to be ticking louder again.  Plenty of power, and no smoke.  I'm having it re-checked for my peace of mind.  It was fun to drive it again.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 15, 2017, 08:01:35 pm
Here are pictures of the broken pushrod:



Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 16, 2017, 04:52:20 pm
The EGR gasket blew.  Or, it got a hole burned through it.  Another gasket is on order.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 16, 2017, 05:23:01 pm
On the left is how my center caps looked upon return.  That is how they actually look.  They don't look so bad with the flash.

On the right is how they looked when I took the car to Texas.  This is one of the replacement center caps.  I'd had the car, with those center caps, for 3 years, and they looked great.  Not so much when I got the car back.

I'm going to have a hard time with the rear emblem.  I don't know if it can be fixed or not.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 16, 2017, 06:19:42 pm
Before the pushrod was replaced, we ran a compression test.  Cylinder 6? (by the battery) was only at 33.  The others were at 160.  After replacing the pushrods and plugs, securing some bolts, replacing the gaskets, setting the timing, adjusting the valves, and securing the rockers, all 6 cylinders test at 160.  All cylinders are firing, and all the engine runs a LOT more quietly.  It doesn't sound like a sewing machine.

I took it around the "Lindbergh/Pershall exit curve" about 50MPH, which was about 2MPH too fast, maybe.  I didn't hit the curb or anything, but slid about 4 feet sideways with all 4 tires.  I watched the curb get closer and closer, and could've used a bit more power, but it straightened out and pulled through.  The guy behind me hopped the curb and went into the grass.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 16, 2017, 08:04:00 pm
Sounds like you're getting it back into condition.  Don't destroy it in a curve.

BTW, the cylinder by the battery is # 2.  Right to left they are 2, 4, and 6.  Trunk side, right to left are 1, 3, and 5, just for future reference.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 16, 2017, 09:39:42 pm
Yeah.  #2.

My Fiero still has lots of issues.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 17, 2017, 06:49:27 pm
I hooked up TunerPro RT, today.  No idea what I'm doing, but hey, I got a graph.  The WinALDL made sense to me, but I was just happy to get the thing to connect.



When I look at this, my RPM is whackadoodle.  Most of the rest doesn't make sense.  I think this graph shows bad grounds.  It was running rough, which I think this shows.
Title: Re: Misc Fiero issues
Post by: f85gtron on November 18, 2017, 07:59:45 am
If you record a short data log of like 5 to ten minutes and post it, I can parse it out for you.
Things I noticed:
1) The o2 sensor is swinging (switching) a lot. That's a good thing. The more the merrier.  You want high switch counts per sample.
2) volts are goofy. I can't figure out what's going on there.
3) it's hard to tell what represents what. I'm assuming the top line is coolant, the whacky line is o2, the volts and something else are close to the bottom (not good for volts), and the vehicle speed is at the bottom.
Am I looking at that right?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 18, 2017, 01:23:54 pm
I have no idea what that shows.  I looked at the Lists view, and there seem to be some errors.  I don't even know if I'm running the correct definitions.  This is the 1990-92 LH0 F-Body 1227730 $88 V3.1 adx file.

I wasn't sure what to upload, so I attached an XDF file.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 20, 2017, 08:10:44 am
I ran my heater in the Fiero for the first time since I got it back.  Smelled coolant.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 20, 2017, 07:06:01 pm
Maybe I had the wrong ADX files.  He sent me some, but I'm not sure how to get rid of the one I loaded, and load the 3 new ones at once.

I think I found the cause of the exhaust leak.  The nut is welded in place, apparently, but the bolt was only snug:

I'm not sure what that bracket above the Y-pipe with the threaded bolt hole is for.

I replaced it and tightened things:


I also replaced the gasket under the EGR mount block.  The holes in the adapter are certainly stripped.  Anyway, I don't feel any more leaks in this area.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 20, 2017, 07:10:24 pm
While I was in there, I compared the coated nut I'd put on the EGR adapter to one that hadn't been used.  I think the coating is mostly gone. :(  The nut had changed from a yellowish color to a silvery color.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 20, 2017, 07:43:05 pm
The bracket is the remains of where the original ignition coil was mounted. 

The coating or color of the bolt wouldn't affect it's functional torque.  I think that a bolt might have been over-tightened.  Once it was stripped, it may have allowed exhaust gases to penetrate the gap, causing the gasket to burn out. 

When I selected the bolts that hold the valve to the adapter, I picked ones that were just long enough to utilize all the threads in the adapter.  I'm not sure, but if there's enough clearance on the bottom, you might be able to put a self-locking nut on a longer pair of bolts.  Not a nylock, but one that has a compression fitting.  I don't remember the name of that particular style nut.  They have little dimples in the flats of the nut. 

Also pay close attention to the adapter to egr valve gasket.  It has one side that's marked 'top'. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 20, 2017, 07:50:24 pm
Good tip about the gasket.  I wondered about the top of the gasket.  Does this gasket go between the EGR valve and the adapter?

The guy said that he forgot to install the gasket, when I asked him.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 20, 2017, 08:12:04 pm
In this picture, the gasket on the left goes between the manifold base and the bottom of the adapter.  For some reason some of the gaskets came to me made of cardboard, while most of them were of the graphite impregnated type like the one on the right.  I have a couple of original GM gaskets and they were wire reinforced with a graphite coating.  I've never seen one of these with 'top' markings.

The one on the right goes between the adapter plate and the EGR valve.  It will be marked 'top' in that little depression just below the round center hole. 

Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 21, 2017, 05:02:06 pm
Well, I think I have lifter issues.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 15, 2018, 07:27:04 pm
Time to pull it, but this temp with the wind chill is....BRRrrrrh!

I put the battery on the tender.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 23, 2018, 12:58:25 am
Well, we pulled the top of the engine.  What we found was 10 of 12 push rods that were less than perfect, and 12 of 12 bad lifters.  Both the lifters and the push rods on #6 were in deplorable condition.  So, we replaced the 10 push rods and all 12 lifters.  That was the second bad set of CompCams lifters, so we used GM Performance lifters, this time.

There was some slack in the shift cable, so we fixed that, and also adjusted the cable for the shifter. I still can't shift to first, but we ran out of time.

Tomorrow, I'll run by Medina Lake for a shakedown run.  That should be about 2 hours' of driving, all told.  Then, we'll replace the left axle, and fix the dust shields.  I hope to address the grounds, a few dead circuits, some fluid leaks, and the non-op check engine indicator, as well.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 23, 2018, 11:50:04 am
Upon pulling the axle that had slung green goo all over, we found not one single tear.  The boot looked perfect.  We did find the source of the leak.



Oddly, it's under the band, right where the clasp is for the ring seal.

We had ordered another axle, but whatever arrived is totally the wrong part.  The shaft is shorter, has splines of a different width, and certainly the number of splines is different.  Also, the ends are different.  I hope we can find the right part locally today.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 23, 2018, 11:59:07 am
For my cruise, things were great.  On the way back, the transmission started shifting early, then hard shifting.  The transmission fluid is about 2 quarts low.  We'll have to figure out where the leak is.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 23, 2018, 02:59:54 pm
We had the axle boot lock ring replaced with the better kind, and the joint re-greased.  Put everything back together and went for a spin.  Acceleration was fine, but when I let off the throttle, the back end kicked out on me.  I tried it a few times, same result.  I wasn't spinning the wheels, so I figured that the axle isn't in all the way.  Everything seems to be tight.  Rrgh.

But, the dust shields are off the rotors, so that should be fixed.
Title: Re: Misc Fiero issues
Post by: Fierofool on January 23, 2018, 04:00:54 pm
New axle nut is a must every time it's removed.  Initial torque on the new nut with the wheel off the ground is ~ 65- 70 ft lb.  Then remove the wheel center cap, install the wheel and place the car on the ground and torque the axle nut to 197 ft. lb.  Do not use any lubricant or anti-seize on the axle threads. 
Title: Re: Misc Fiero issues
Post by: Roger on January 23, 2018, 04:05:04 pm
Upon pulling the axle that had slung green goo all over, we found not one single tear.  The boot looked perfect.  We did find the source of the leak.



Oddly, it's under the band, right there the clasp is for the ring seal.

We had ordered another axle, but whatever arrived is totally the wrong part.  The shaft is shorter, has splines of a different width, and certainly the number of splines is different.  Also, the ends are different.  I hope we can find the right part locally today.

From where did you get the wrong axle?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 23, 2018, 05:00:10 pm
The axle was ordered from O'Reilly's, the same as the one with the boot issue.

When we pulled the axle, should fluid have come out of the transmission?

That wasn't fun, off and on with the axle several times.  Everything is tight.  This last run, no issues, and I pushed it a bit.

We, um, didn't replace the axle nut.  Hope that doesn't cause issues down the road.  We'd have had to have a pile of nuts.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 23, 2018, 08:39:56 pm
The engine is running rich (think 17 MPG).  The idle is set to 700 RPM, and fights to get down there, but then bobs back up.  In TunerPro, it shows that it's actually running around 832 RPM, but the gauge shows 900 RPM.  The needle just wobbles a bit, and the idle isn't smooth, but part of that is that it's running rich.

The power socket and light have no power.
Title: Re: Misc Fiero issues
Post by: Fierofool on January 23, 2018, 10:44:54 pm
Get a new axle nut.  Yes it can cause issues down the road.  And it's not unusual for fluid to spill when the axle is removed.

Sra you sure that your tranny upgrade uses a stock Fiero axle?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 24, 2018, 07:24:45 am
The axles are from a Pontiac 6000 with light duty brakes.  I'd have to look up the year.

Fluid didn't spill, although we expected it to.

What happens, if I don't replace the nut?  I'll have to do it when I get home.
Title: Re: Misc Fiero issues
Post by: Fierofool on January 24, 2018, 07:47:48 am
The nut won't hold torque on the hub and eventually the bearings will fail, or maybe worse.  Always follow the two step torquing procedure.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 24, 2018, 11:30:09 am
Progress!  I got most of my old parts back, although we can't find the second RKE unit or the under dash courtesy lights.

The check engine light issue was a connection on the circuit board.  I don't know why the power adapter wasn't working.  Maybe a bad connection.  The LED by the power adapter was in backwards.

We fixed the shift issue by adjusting the TV cable.

Just finished giving the engine a seafoam treatment through the intake to clean up the carbon.

The RKE is working now, but I'll probably have to replace the module.

We tried the cruise with a module I brought.  No change.  Probably need the AR module from a V8.

After the engine cools off, we'll check for exhaust leaks.

No check engine codes.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 24, 2018, 01:33:26 pm
The issue with the vacuum hose going to the modulator on the transmission ended up being the hose itself.  We replaced it with a heavy-duty hose, and it stays put.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 24, 2018, 08:15:45 pm
We cannot find any fluid leaks.  No drops, nothing on the car.  Washed and drove for 85 miles.  Still no leaks.  Transmission fluid was again a quart low.  Maybe the converter wasn't full.  In any case, it shifts fine, and runs great.

New problem.  After about 60 miles, the service engine light came on.  I put the computer on it, and it shows EGR issue.  I looked at the EGR, and the Fiero cable to the transmission had gotten jammed in the EGR, probably when the EGR was removed so we could drill out the bolts on the rear manifold flange.  The cable still works, but it's toast.  So, I've got to source that cable, whatever it's called.  Darn.

I'll add the missing bolt to the coolant crossover tube tomorrow.  I got all the fasteners in place on the top of the radiator.  I blew out all the little wire ends and other debris.

I don't know if the EGR solenoid itself is bad.  I've been told it is, but I don't believe so.  I think that there was a gap caused by that cable being in there, and that caused a code to be set.  I did clear the computer, and the code came up again.
Title: Re: Misc Fiero issues
Post by: TopNotch on January 24, 2018, 09:19:49 pm
There are hoses in the area of the driver side rear wheel well that carry trans fluid. The clamps can be loose enough to leak fluid when the car is running, and the fluid is under pressure. But they may not leak when it is not running.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 24, 2018, 10:05:32 pm
Well, I've put about 150 miles on it. Then parked on clean concrete, and got no drips.  There is no fluid on the underside of the car.  I have no idea where that fluid went.  It was leaking, at one point, at my house.  Since then, the valve cover leaks, oil cap leak, and a few other leaks were fixed.  It's possible that the transmission wasn't full, and that all those leaks were from the engine oil.

There was also a puddle under the front of the car, at home, but not here.  I couldn't reproduce any leaks at this time.
Title: Re: Misc Fiero issues
Post by: Roger on January 25, 2018, 08:04:59 am
Well, I've put about 150 miles on it. Then parked on clean concrete, and got no drips.  There is no fluid on the underside of the car.  I have no idea where that fluid went.  It was leaking, at one point, at my house.  Since then, the valve cover leaks, oil cap leak, and a few other leaks were fixed.  It's possible that the transmission wasn't full, and that all those leaks were from the engine oil.

There was also a puddle under the front of the car, at home, but not here.  I couldn't reproduce any leaks at this time.

If it's like a helicopter, if it ain't leaking...its empty. :o
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 25, 2018, 08:38:12 am
Well, it sat on a clean concrete floor, last night.  I'll check it in a bit, but I hope everything is dry.  I put it away hot and full of fluids, last night.

Today (shortly), I'll be loading it up to take it home.
Title: Re: Misc Fiero issues
Post by: TopNotch on January 25, 2018, 10:02:54 am
I assume that you know, when you check auto trans fluid, it should be done right after driving the car for a while. The fluid should be warm, and the transmission should have been through some gears.
Title: Re: Misc Fiero issues
Post by: Roger on January 25, 2018, 08:46:36 pm
Well, it sat on a clean concrete floor, last night.  I'll check it in a bit, but I hope everything is dry.  I put it away hot and full of fluids, last night.

Today (shortly), I'll be loading it up to take it home.
I hope all is well. You've put a lot of hard work into it.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 26, 2018, 10:20:09 am
I assume that you know, when you check auto trans fluid, it should be done right after driving the car for a while. The fluid should be warm, and the transmission should have been through some gears.

I did not know, but drove for 50 miles.  Stop and go traffic.  We tested with the engine running.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 26, 2018, 10:42:25 am
I drove home, last night.  1,084 miles yesterday.  I can't wait to go for a drive.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 26, 2018, 05:16:45 pm
What are the symptoms of a bad digital EGR valve?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 26, 2018, 05:24:29 pm
Is it possible that the digital cruise gets ground through its case?
Title: Re: Misc Fiero issues
Post by: Fierofool on January 26, 2018, 06:07:50 pm
What are the symptoms of a bad digital EGR valve?

Good question.  But I would think the ECM would recognize it and light the SES light.

f85gtron and Scottb have done the digital cruise.  Maybe they'll drop in and comment.
Title: Re: Misc Fiero issues
Post by: Roger on January 26, 2018, 06:29:09 pm
Is it possible that the digital cruise gets ground through its case?

Not entirely certain on the case. Pin 'C' should be at ground tho.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 26, 2018, 06:41:23 pm
What are the symptoms of a bad digital EGR valve?

Good question.  But I would think the ECM would recognize it and light the SES light.

f85gtron and Scottb have done the digital cruise.  Maybe they'll drop in and comment.

Oh, it does light the check engine light.  After an hour or so of driving.
Title: Re: Misc Fiero issues
Post by: Roger on January 27, 2018, 09:37:20 am
What are the symptoms of a bad digital EGR valve?

Good question.  But I would think the ECM would recognize it and light the SES light.

f85gtron and Scottb have done the digital cruise.  Maybe they'll drop in and comment.

Oh, it does light the check engine light.  After an hour or so of driving.

I don't know if the 7730 uses the same Code set or not. After an hour or so of driving I wouldn't think it would be the EGR.

Fierofool is right. Hopefully f85gtron or scottb will chime in soon.

Edited for readibility.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 04, 2018, 01:07:45 pm
Again, a puddle under the front of my Fiero.  I got caught up with family things yesterday when the temps got into the 50's, and it's frigid, today, but I'm trying to figure out what the fluid is.  I don't see any drips.  After being driven and parked several times, the puddle appears under the same spot.  The puddle is roughly under the right side of the steering rack.  When I look above the puddle, I see the front crossmember.  I do not understand why there were no leaks for a whole week.

I plan to go for a drive again, and place a piece of paper or something under that area.  My theory is that I should be able to tell what the fluid is by the color.
Title: Re: Misc Fiero issues
Post by: TopNotch on February 04, 2018, 02:44:16 pm
I'm trying to figure out what the fluid is.
Motor oil is brown, (fresh) auto trans fluid is red, brake fluid smells, and coolant tastes bitter-sweet. (Yes, I know it's poisonous. Spit it out after tasting.)
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 04, 2018, 02:50:43 pm
My motor oil is almost clear, just like it came out of the container.  It is difficult to see my fluid levels on their respective sticks.
Title: Re: Misc Fiero issues
Post by: Fierofool on February 04, 2018, 04:39:14 pm
Unless you have power steering, it's either pure water from rain, washing, or condensate, or a coolant leak.

Oh, yeah!  It might be the kitty cat peed there.  Don't taste it.  Spitting it out doesn't help.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 04, 2018, 04:43:37 pm
It's snowing, but I got under the car and looked.  The leak is slightly forward of the right wheel.  If those are the options, it must be coolant.  No cat, and this liquid doesn't evaporate.
Title: Re: Misc Fiero issues
Post by: Fierofool on February 04, 2018, 04:51:52 pm
Coolant recovery tank hose or maybe a crack in the tank?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 04, 2018, 05:23:39 pm
What I don't understand is that it leaked here, didn't leak for the week we worked on it, and now is leaking here again.  I wondered about the overflow tank, also.  Brand new, from TFS, but the quality was very poor.
Title: Re: Misc Fiero issues
Post by: Fierofool on February 04, 2018, 08:30:42 pm
See if there's a puddle on top of the tank.  Sometimes when overfilled they will vent through the cap.  Could be the lower clamp on the tank hose, too.
Title: Re: Misc Fiero issues
Post by: Roger on February 05, 2018, 08:09:26 am
Windshield washer fluid tank?
Title: Re: Misc Fiero issues
Post by: Fierofool on February 05, 2018, 09:05:10 am
I thought washer fluid, too, but that tank's inside the front compartment.  I think the only place for it to escape is in the center underneath the spare tire. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 05, 2018, 06:17:32 pm
I haven't driven my Fiero for several days, but the puddle is still growing.  Nothing on top of the coolant tank, but there was wetness on the sway bar.  Looking under the coolant tank, there was a drip.  I put my hand on the bottom of the coolant tank, and was coated in coolant.  Rrgh!  I guess the leak function is included in new coolant tanks.
Title: Re: Misc Fiero issues
Post by: Fierofool on February 05, 2018, 09:45:38 pm
Check the hose clamp and the end of the hose for splits.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 09, 2018, 06:11:46 pm
My poor engine and transmission are going to the junk yard.  There wasn't anything wrong with them, but they're toast now.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 15, 2018, 06:26:27 pm
Today, it got warm, but will be cold again tomorrow.  I wanted to test a few things.  First, I found that the coolant isn't leaking today.  Second, I found that the tube clamp at the bottom of the overflow tank isn't in place.

How can you tell if it's in closed loop?  I ran the engine, and the fan came on after about 5 minutes.
Title: Re: Misc Fiero issues
Post by: Fierofool on February 15, 2018, 08:23:55 pm
I don't remember what the temp is for closed loop, but when it goes in, the engine idle rpm will drop. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 15, 2018, 09:26:41 pm
It does drop a bit.  Basically, it runs around 900 RPM.  I heard the idle drop.  The fan came on after that.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 18, 2018, 09:13:31 pm
I pulled the coolant overflow tank today, although it wasn't dripping.  It was moist on the bottom, by the feed tube.  It had the wrong type of clamp.  I couldn't get the right clamp in the right size, so I adjusted the hose and tightened the clamp.  Then my son and I went for a drive.  About 90 miles.  I'm fairly sure everything on the car was warmed up.  I'll check for a puddle tomorrow.  The coolant is a bit low (I spilled some from the tank).

I think I'm going to have to adjust the TV cable.  Heck, I've got to replace it, anyway.  When the transmissions shifts, if I'm fully on the throttle, the engine hits the rev limiter twice, then shifts.  There is sometimes a slight hesitation about halfway through a gear on about half throttle.  I don't know why, yet.

After about 30 minutes' driving, the check engine light came on again, and stayed on for the duration of the ride.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 22, 2018, 08:08:14 am
I noticed that the exhaust got suddenly throatier, going up hills.  Also, it seems to be burning oil.  Got home, pulled the stick.  Oil is dark, and 2 quarts low.  Hmmmm.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 03, 2018, 12:59:00 pm
Well, the exhaust issue may have been self-inflicted.  Where the EGR mount plate bolts to the Y-pipe, there is a 1-inch piece of gasket missing on the tube side, and the exhaust is pouring out of there.  Probably, that gasket was upside down.

I checked the PVC valve.  It's clean.  It rattles.  Checked for vacuum through the valve on idle.  Yes.  There does seem to be oil in that vacuum tube, though.

I'm going to check for fuel in the MAP sensor vacuum tube next.  Then a leaky injector test.  Right now, I'm avoiding the code enforcement officer.  He's wandering around out there.  When I saw him, I carried in a sack of "groceries" and closed the decklid.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 03, 2018, 09:07:23 pm
Well, no fuel in the MAP sensor vacuum tube.  I'm not sure what is causing the issue with the oil.  The fuel pressure gauge wasn't available for rent.  I have to wait my turn.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 04, 2018, 05:30:07 pm
As it turns out, this gasket has no up or down.  This gasket is the one from the crossover pipe to the EGR mount plate.  I guess it's made of graphite.  It disintigrated.  I scraped the remains of the gasket off with my fingernail.  This gasket was purchased new from TFS in November of 2017, and has fewer than 500 miles on it.  Something isn't right.  Wouldn't you figure that should be an aluminum gasket?

Meanwhile, I went back to rent the fuel gauge.  That's fine and dandy, except now they think it's lost.  That was O'Reilly's, where they couldn't find parking light bulbs, because they didn't come up in their computer.  So I asked about buying one.  Not my day.  They didn't have one in stock on ghe shelf, although the computer says they have several varieties.  They checked with some other locations, but none actually had any any in stock.  So I tried Autozone, Advance, and NAPA.  I wasn't sure they really knew what they were looking for, so I showed them a picture.  Apparently, they didn't appreciate my help.  What is the likelihood that all major parts retailers in a major metropolitan area are out of fuel gauges at the same time, although their computer says they have it, AND the stores aren't aware of this defficiency?

The counter robots were similarly unable to locate parking light bulbs.  I found the bulbs, no help from them.

As for the gasket, local retailers do not carry this part, or even recognize that it exists, because it isn't listed in their system at all.
Title: Re: Misc Fiero issues
Post by: Fierofool on March 04, 2018, 07:57:27 pm
Michael, I have 3 GM OEM gaskets.  They are graphite coated and I believe they have a wire mesh inside them.  Email, text or PM me your address again and one will be in the mail in the morning. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 04, 2018, 08:01:37 pm
I ordered 2 from the Fiero Store.  I feel badly about you spending money to mail me parts.

I'm wondering of the problem could be that I have a heat-coated EGR mount plate.  I put the question to TFS.  I believe they discontinued selling this product, and this could be the reason.
Title: Re: Misc Fiero issues
Post by: Fierofool on March 04, 2018, 08:32:33 pm
It couldn't cost more than 2 Forever Stamps to mail it. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 05, 2018, 06:32:51 pm
TFS says there have been no such issues with the heat-coated EGR mount plate.  They suggested that I find out why the exhaust is getting so hot.  Surely, that much heat would cause problems for other gaskets, as well, such as the one on the top of the mount plate.

The only real complaint I have about the engine is that the MPG is low.  The flooding/burning oil should be a separate issue, but perhaps not.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 15, 2018, 08:21:14 pm
The gaskets arrived today.  They are purple, and seem to be made of some sort of metal.  I put one in, and put the Fiero back together.  It fired right up, after sitting for 12 days.  No smoke, nothing.  It just fired right up.  I went for a 30-minute drive.  No leaks, and it sounds right.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 15, 2018, 08:22:58 pm
I have the new detent cable, and tried to replace it, but that didn't go well.  I maybe should've released the end off the throttle, but I couldn't get the end out of the transmission.  It works--it just looks badly.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 02, 2018, 06:19:31 pm
What could happen while the lower intake is off that would cause oil and fuel to mix?  Gasket?  Mechanical?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 20, 2018, 03:29:46 am
What happens if I drive my Fiero in its current condition?
Title: Re: Misc Fiero issues
Post by: GTXVette on April 20, 2018, 07:44:34 am
   If the smoke cleared do not worry unless it appears again. if the Detent is not adj. Correctly It Can Cause Trouble with the clutch Plates as they don't Shift with the lock up force they need and then they Wear. If It's as Simple as most GM cars It's Easy. If it's all hooked up Push in the Cable adj. lock and rotate the throttle to wide open at the Injector not the pedal, then let go the lock then the throttle. that should be it.  Of course the Fiero is likely diff.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 20, 2018, 08:19:40 am
I'm worried about whatever is causing the oil to get black, and the oil to be burned.
Title: Re: Misc Fiero issues
Post by: Fierofool on April 20, 2018, 11:37:11 am
Engine oil doesn't stay clear.  It quickly picks up blowby contamination from the engine and starts turning dark.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 20, 2018, 12:38:26 pm
I lost a quart of oil in less than 1,000 miles.  It's visibly burning oil.

Perhaps the oil does get dark, but I've run new engines through several oil changes, and still had almost clear oil.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 23, 2018, 06:20:34 pm
I learned something new yesterday: the injectors need to match.  If you have a "matched" set of injectors that aren't identical, your ECU will have problems figuring things out.  Apparently, the ECU knows something about the injectors, liking some types, but not other types.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 26, 2018, 10:02:06 pm
Hmmm.  Apparently, there are still vacuum issues.  There is supposed to be a pressure difference going to the vapor cannister.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 26, 2018, 10:15:34 pm
I took the Fiero out for a drive, today.  There were several oddities:
1.  Rather than the usual 16 MPG, I got about 28 (8 gallons in 237 miles) at 80 MPH.
2. The engine kept cutting out on me, as if it wasn't getting fuel.  Usually, this was just a pause, but once I lost power for several seconds, and another time, almost didn't get it re-started.
3.  The AC never got more than cool.
4. The engine ran almost at the red for temp, for the first tank of fuel, which got me about 22MPG, then for the 28MPG tank, it ran about halfway.  I noticed with the first tank that the engine ran hotter at 70+ MPH than at 50 MPH.
5. When downshifting, it went to second gear, which is about 6K RPM.  Adjustment needed.

I was thinking that maybe the engine got heat-soaked.  I will say that above 80 MPH, the engine comes to life.

Changing injectors.  Not liking the Accel brand.
Title: Re: Misc Fiero issues
Post by: f85gtron on May 28, 2018, 08:08:25 am
I learned something new yesterday: the injectors need to match.  If you have a "matched" set of injectors that aren't identical, your ECU will have problems figuring things out.  Apparently, the ECU knows something about the injectors, liking some types, but not other types.
close.  the ecm doesn't know anything about the injectors, BUT, it is programmed with dwells, offsets, holds, algorithms that start the opening process and closing process for each shot, based on fuel pump voltage, battery voltage, map, and some other things I've forgotten.
so, those calcs are only good for one part number injector. if another model is installed, that's when the fun starts. the only remedies are to reprogram the ecm, or install the proper injector.
to that end, yes, the injectors should at least match, if not be correct too.
this is the reason pintle vs. disk is a valid argument.
hope this helps
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 28, 2018, 08:12:03 am
These injectors are leaking.   They'll all be replaced.  I'm undecided on staying with 17# injectors, or going back to the stock injectors.
Title: Re: Misc Fiero issues
Post by: f85gtron on May 28, 2018, 09:37:11 am
3.4, right?
either 17# or Ford 305 injectors (19#).  I've got the Ford injectors, but lowered the maps to around 45% duty cycle (from 70%), which doesn't make sense, but it works.
the factory 17# should work well, as long as they match. Did you go 7730? i can't remember.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 28, 2018, 09:41:13 am
Yes, '7730.  It has the TFS Accel 17# injectors, but half are yellow, and half are grey.  They look very differently.  Ryan said it is programmed for 15# or 17#.
Title: Re: Misc Fiero issues
Post by: f85gtron on May 28, 2018, 11:07:32 am
what Ryan meant by programming for either/or was he programmed the fuel map in between and is counting on the ecm to compensate. however, if the injectors offsets in the ecm program don't match the injectors installed, it will run anything but perfect (I don't accept anything but perfect, to my dismay). 
you'll have hunting idle, weird acceleration characteristics.  basically, picture a dog chasing its tail.  your ecm is looking for the sweet spot, but it's constantly changing and it isn't where it's supposed to be. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 31, 2018, 06:48:59 pm
Can oil come up through the tube on the front valve cover to the intake boot, and then through the intake?
Title: Re: Misc Fiero issues
Post by: Fierofool on May 31, 2018, 07:43:42 pm
Yes.  If there's a lot of blow-by or a defective or stuck PCV valve is allowing a lot of crankcase pressure.  There is a natural oil fog that's pulled through that tube and burned.  It isn't unusual to see an oil stain in the breather tube, but there shouldn't be excessive oil present.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 31, 2018, 07:46:04 pm
There is no oil in the tube from the PCV valve, which clicks like a champ.

How did the Fiero originally do without that tube?
Title: Re: Misc Fiero issues
Post by: Fierofool on May 31, 2018, 09:16:28 pm
There was a rubber hose that attached from the front valve cover to a metal tube on the front firewall.  The other of the metal tube had a rubber hose that attached to a nipple on the back of the air filter canister.  That was the pre-recall setup.  In the recall, the rubber hoses were removed and the nipple on the filter canister was capped or the canister was replaced with a new design.  The intake snorkle was replaced with a new design and the metal tube was installed into the front valve cover grommet and into a port in the new design intake snorkle. 

The PCV valve is in the trunk side valve cover.  The front metal hose doesn't have a PCV valve in it. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 31, 2018, 09:25:53 pm
Right, about the PCV valve.

When the recall was done on my '88, maybe they were lazy.  The intake tube was replaced, and the metal tube that runs from the front valve cover to the intake tube was installed, but the air cannister wasn't capped, and the metal tube against the firewall was not removed--or capped.  I restored the cannister I had, capped that hole, and installed new gaskets.  I capped, then later removed the tube against the firewall.  My cannister was replaced with one that isn't as nice, but it doesn't have that hole.  I have no idea what happened to that gasket, so I'll have to get another one.

In my '86 Fiero, someone cut a hole in the intake tube and duct-taped the metal tube from the valve cover into place.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 13, 2018, 05:55:01 pm
So, the EGR isn't working at all.  The lower intake gasket will have to be replaced.  The brand new Rodney cat is bad.  The crank sensor seems to have issues that are getting more pronounced.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 18, 2018, 06:47:53 pm
Discovered power on the harness where there should be ground.  Hope it didn't hurt the ECM or the ICM.  Replacing the injectors.  Looks as if the MAP sensor is bad.  Going to move the coil packs to the block, which should ensure a common ground.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 29, 2018, 04:18:55 am
The coolant leak at the overflow tank was due to a pinhole leak in the hose.

Still no cruise.  Awaiting parts, but USPS lost them.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 03, 2018, 07:17:28 pm
Replaced exhaust manifolds, again.

Have new matching injectors.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 05, 2018, 05:56:06 pm
Slowly getting through the issues.

Found the right side transmission seal and the pan gasket are leaking.  Also the harness is stuck behind the coolant crossover tube.  Gotta pull the cradle.  Joy.

Going to go with studs for the exhaust manifolds.  Waiting on gaskets.

Going to replace the axle nuts and inner seals.  I see another alignment in my near future.

Title: Re: Misc Fiero issues
Post by: Raydar on July 05, 2018, 06:07:22 pm
...The brand new Rodney cat is bad. 

How did you arrive at that conclusion? Brand new cats don't arrive "bad". Stuff from Rodney is especially high quality.
How could you tell?
If it failed, it was probably due to excessive fuel (I finished off a well-used cat, due to a bad O2 sensor) or some other form of overheating.

Going to replace the axle nuts and inner seals.  I see another alignment in my near future.

If you don't remove the struts from the knuckles, you really don't need an alignment. Everything else will bolt back together.

I've removed cradles from my '88s repeatedly. As long as the strut/knuckle remains bolted together as an assembly, you can pretty much disassemble whatever you need to. This include the long bolts, trailing links and lateral links.
Just bolt it all back together. Everything should be fine. Seriously.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 05, 2018, 06:19:12 pm
Well, new about 1,000 miles ago.  Banged on the bottom, and the cat went "woof, woof".  Cat is all loose inside.  Doesn't that mean it's bad, when the cat is a dog?  Yes, it was running rich.

I've done the strut/knuckle removal.  True, didn't need an alignment then.  This time, pulling the cradle.  May put Rodney's girders on.  That requires removing the long bolt.  That left wheel bearing was an issue, last time I tried to not remove the knuckle.  I think the angle of the axle shaft damaged the bearing.  I don't want to damage the new bearing.

Also, will probably replace the tie rods, ball joints, and control arm bushings in the front.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 05, 2018, 06:20:21 pm
I see you added about the long bolt.  I'm still worried about that bearing.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 09, 2018, 07:11:40 pm
Have the wiring harness out for a go-over.  Hoping to clean up the wiring a bit.

One rust spot found on the trunk, so that will need to be fixed.

Still don't know why it was cutting out.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 10, 2018, 07:59:38 am
Who is it that is running with a "test cat"?
Title: Re: Misc Fiero issues
Post by: Fierofool on July 10, 2018, 10:12:09 am
I have a test pipe on my 87.
Title: Re: Misc Fiero issues
Post by: TopNotch on July 10, 2018, 12:47:07 pm
I have a test pipe on my Formula. The cat started making an annoying rattle, so I removed it. I may get a Rodney cat later, just to improve the smell of the exhaust.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 10, 2018, 05:40:14 pm
Hmmm.  So my exhaust will smell?

What happens if you add a cat?  Run any differently?
Title: Re: Misc Fiero issues
Post by: TopNotch on July 10, 2018, 05:57:10 pm
Hmmm.  So my exhaust will smell?

What happens if you add a cat.  Run any differently?

No difference at all if it's a good cat.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 10, 2018, 06:08:40 pm
Ah.

Found the cause for smoke on startup.  The transmission vacuum modulator is bad, and ATF was being sucked into the intake.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 12, 2018, 04:55:52 pm
Engine goes back into my Fiero tomorrow.  Don't laugh, but the wiring harness issue was at a plug, so that work was for nothing.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 13, 2018, 05:40:08 pm
Small problem.  The vacuum port under the intake for the PCV valve is pushing on the FPR.  The port will have to be moved.  The vacuum port for the EGR is also interfering, so adjusments are needed there, also.  The intake plenum doesn't set flat against the middle intake, as is, and I don't want to crack it.

If it seems I'm being picky, I guess I am.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 13, 2018, 05:50:58 pm
Something's out of place.  There's normally plenty of room above the FPR.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 13, 2018, 05:58:50 pm
I'm abnormal.

Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 13, 2018, 06:01:18 pm
Oddly, this plenum has been off and on, several times.  I'm not sure why it's hokey, now.  It seems that last time we fiddled with it until it fit.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 15, 2018, 10:25:34 am
Is there any issue with the proximity of vacuum ports on the intake plenum?  Surely there were reasons for placement.  I'm concerned that 2 vacuum ports (EGR & PCV) may be too close together.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 16, 2018, 07:20:41 pm
To prevent bearing problems from re-using the axle nut, I replaced the rear wheel bearings and seals, AND the axle nuts.  Hopefully, that will be enough.

While the cradle is out, small issues with insulation were addressed, along with a few rust spots.  The rust on the strut hats has also been addressed.

The broken plug wire retainter clip was replaced, and the plug wires are now routed correctly and the correct length.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 17, 2018, 05:43:54 pm
The high- and low-pressure lines on the AC compressor can be accidentally swapped.  Who knew?
Title: Re: Misc Fiero issues
Post by: Fierofool on July 17, 2018, 10:49:47 pm
How?  They are on a fixed mounting flange and can only be put on one way.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 18, 2018, 06:26:10 am
The AC compressor was replaced after the original went bad.  Apparently, GM doesn't make them quite the same, anymore.  I was told that this is common.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 19, 2018, 06:45:35 pm
Everything is back together.  Well, everything in the engine bay, anyway.  Wouldn't start, unless it was floored, than ran terribly.  Readings were erratic.  Code 42.  Replaced the ICM.  Starts and runs, but throws a code.  Suspect the O2 sensor.

AC wouldn't hold a charge.  Found 2 bad o-rings.  Will see if the AC holds a charge overnight.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2018, 07:30:30 am
How?  They are on a fixed mounting flange and can only be put on one way.

The control lines.
Title: Re: Misc Fiero issues
Post by: TopNotch on July 21, 2018, 08:38:21 am
I think he's talking about the pressure switch wires. If I recall correctly, the pressure switches are keyed, which would make it difficult to put the wires on wrong.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2018, 08:46:50 am
Well, once the IAC is sorted (need to drive the car), the AC can be tested, and then we'll know if that fixed it or not.  There are a few other things that need to be fixed.

The issues with the gauges, cruise, and EGR should be fixed.  Again, we'll see.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 21, 2018, 08:49:06 am
The refrigerant lines out of the compressor are on a flange that can only go in one way.  The 2 pressure switches can go into either port.  Raydar clued me in that they get their pressure from a common chamber.  RWDPLZ posted pictures on PFF showing the small port in the bottom of each, that connects them to the same internal chamber.  You can install the high and low pressure switches in either port but you must be sure to connect the correct harness wire to the proper switch. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2018, 08:54:02 am
It seems that, during one of the prior times pulling the cradle out and putting it back in, the high/low pressure switch wires got swapped.  So, the AC blew cool, but never really got cold.  I could drive for hours with the AC on full, and the cabin would just get cool.  Considering 78 degrees is comfortable for me, it wasn't very cool.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 21, 2018, 04:04:47 pm
The old style pressure switches cannot be switched due to their design.  The posts on them are male or female.  Their corresponding terminal ends are just the opposite.  They fit like a heterosexual couple. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 22, 2018, 12:42:23 pm
Short drive today.  The weather is not cooperating.  Runs, idles, stops fine.  AC held a vacuum for the last several days.

The oil pressure runs at 80.  Hmmm.  Otherwise, the gauges seem to be OK.

Still need to fix a few issues, but getting close.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 23, 2018, 07:03:25 pm
So close, but so far.  So frustrating!  My Fiero has a miss under acceleration.  I suspect a plug, plug wire, or coil pack.  I know someone else had this, but don't recall what they did to fix it.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 26, 2018, 06:31:03 pm
Re-adjusted the valves, but the issue ended up being a bad new plug.  The MSD wires were getting blown off the plugs, so replaced the plug wires with a set from Summit Racing.  Runs like a top.

Still need to charge the AC and figure out where the coolant smell is coming from.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 30, 2018, 07:41:24 pm
Charged up and ready to go.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 31, 2018, 05:44:26 pm
Can't win for losing.  AC system developed issues.  Too much oil, and someone had put sealer in the system.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 02, 2018, 10:32:53 pm
Took my Fiero for a shakedown drive.  SES light after a few miles, so came back.  Ended up being the throttle wasn't closing, due to faulty cruise module.  Left again, SES light, AGAIN.  This time, it wouldn't go back off.  EGR.  Replaced the EGR, cleaned the contacts, but it was likely a loose bolt.

Drive a few hundred miles, no brakes.  Eventually found a brake hose had rubbed through and leaked out all the brake fluid.  No brake hose available locally.  Clamped up the hose with vise grips, filled 'er up with fluid, and headed home.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 02, 2018, 11:49:23 pm
Getting so that when I think of your car, I think of that song they sang on Hee-Haw.  "If it weren't for bad luck..........".
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 03, 2018, 12:28:20 am
Believe it or not, I'm trying hard to fix everything.

Get this.  When it got dark, I turned on my headlights.  Something seemed odd, but I didn't realize what it was until dusk: no backlighting on the gauges.  Made sure the dimmer switch was plugged in.  Made sure the dimmer module was plugged in.  Checked the fuses.

Finally, I turned the dimmer switch ON, and behold!  Backlighting!  Woops.

Those vise grips rode back there for several hundred miles.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 03, 2018, 07:06:10 pm
Here is the broken plug:


I hope this isn't commonplace.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 04, 2018, 11:32:58 am
I have an issue on throttle tip-in.  If I'm at a stop, with the engine idling, and I open the throttle, the engine sounds as if it takes a breath then goes.  It doesn't just go.  No idea why.

There is something that sounds loose.  I can't seem to figure out what it is.  Whatever it is, it's over my left shoulder.  I hear the sound when going over bumps at any speed, and when shifting around 20MPH.  Sometimes, it sounds like a bolt grating through a hole; other times it sounds like a loose window.  Sometimes, the sound seems to originate from the strut tower area; other times from the area right below the B-pillar; sometimes from the B-pillar area itself, about the area of the striker.  The door is closed tightly, the window and windows lift mechanism are tight.  I pulled the left wheel and verified that the strut and tri-links are all tight.

Any ideas?
Title: Re: Misc Fiero issues
Post by: Fierofool on August 04, 2018, 06:50:58 pm
Kay's 85SE has something similar.  I couldn't determine where it came from.  She said it was something sliding or rolling inside the door. 
Title: Re: Misc Fiero issues
Post by: Raydar on August 04, 2018, 07:00:43 pm
...
There is something that sounds loose.  I can't seem to figure out what it is.  Whatever it is, it's over my left shoulder.  I hear the sound when going over bumps at any speed, and when shifting around 20MPH.  Sometimes, it sounds like a bolt grating through a hole; other times it sounds like a loose window.  Sometimes, the sound seems to originate from the strut tower area; other times from the area right below the B-pillar; sometimes from the B-pillar area itself, about the area of the striker.  The door is closed tightly, the window and windows lift mechanism are tight.  I pulled the left wheel and verified that the strut and tri-links are all tight.

Any ideas?

Stand beside the door and throw your hip against it, where it latches. See if you find your rattle. It's possible that the striker bolt has worn.
People seem to like the Ford striker bolts that are available in the "HELP" section at the parts stores. They are a few thousandths larger.
Title: Re: Misc Fiero issues
Post by: Raydar on August 04, 2018, 07:04:56 pm
I have an issue on throttle tip-in.  If I'm at a stop, with the engine idling, and I open the throttle, the engine sounds as if it takes a breath then goes.  It doesn't just go.  No idea why.

Any ideas?

The equivalent of an "accelerator pump shot" is triggered when you step on the throttle. The TPS is about the only thing that will affect that. Or maybe ignition timing.
Try adjusting the "tang" on the throttle position sensor, for a slightly higher TPS voltage. (If you have a way to monitor it. Otherwise, just bend it a bit so that the TPS is a little more 'ahead of itself" than it is now.)
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 04, 2018, 07:21:13 pm
Ignition timing should be on.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 04, 2018, 08:01:52 pm
Nothing happened with the hip check. Maybe I don't weigh enough, though.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 04, 2018, 09:15:50 pm
Be cautious with the hip check and don't get too aggressive.  My passenger door is cracked from the belt molding to the top, right along the back edge of the door.  I think it may have been from someone hip or butt-checking the door to close it. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 04, 2018, 09:26:27 pm
Someone suggested checking the decklid vent on that side.  The vent seemed to be tight, but I removed the vent and went for a ride.  Same noise.  In my admittedly non-expert opinion, the vent probably couldn't make that noise from more than a mile away.
Title: Re: Misc Fiero issues
Post by: Raydar on August 05, 2018, 09:31:51 am
Be cautious with the hip check and don't get too aggressive.  My passenger door is cracked from the belt molding to the top, right along the back edge of the door.  I think it may have been from someone hip or butt-checking the door to close it.

Ouch.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 05, 2018, 10:10:28 am
I was told that, once plugs have been flooded, the plugs are ruined, and cannot be re-used.  This seems unlikely, because the instructions for starting the Fiero when flooded are to floor the accelerator to clear the flood.  Nothing about plugs.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 05, 2018, 02:44:16 pm
If you have to pull your plugs to clean them, CRC Electric Contact Cleaner does a great job.  It will remove deposits, dry almost immediately without leaving a residue, and is non-conductive. 
Title: Re: Misc Fiero issues
Post by: Raydar on August 05, 2018, 04:01:25 pm
I was told that, once plugs have been flooded, the plugs are ruined, and cannot be re-used. 
...

It depends upon how badly they are "carboned up".
It's possible for plugs to be "killed' that way, but it take more effort than having been flooded one time.

When my car was in the paint shop, they apparently started it up, moved it 40 feet, and then turned it off. Many times. Also left it out in the rain where the plug holes filled with water.
When I started it up to drive it home, it woke up pissed. Skipped and stumbled most the way home. Don't recall if it cleared it's throat, or if I had to change the plugs.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 06, 2018, 09:03:40 pm
My Fiero hates me.  Will not stay running.  Ran fine this morning.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 07, 2018, 06:15:57 pm
My Fiero is missing the brake hose brackets on the struts.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 08, 2018, 08:06:12 pm
Apparently, the brake host brackets may not come with some braided brake hoses.  The ones from BTR, Summit, and TFS did not come with the brackets, for example.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 08, 2018, 10:31:36 pm
If you have a Fastenal or maybe a Grainger near you, you can get a bracket to go on the hose.  It's P shaped with a rubber insert in the loop and a mounting hole in the leg of the P.  Go to www.clipsandfasteners.com and search for tubing clamps to see an example. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 08, 2018, 10:35:43 pm
For now, the hoses run down from the caliper, then up and to the brake line.  I verified that the hoses are not pinched when the suspension is fully extended.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 12, 2018, 08:53:19 pm
It never fails.  The service engine light came on, just as I went to get classified.  EGR again.  We tightened the HECK out of those bolts.  Went for the 110-mile cruise, no codes.  Still a clunk, though.  Found the front cradle bolts were loose.  Oops.  Tightened those.  Drove to my hotel. Sunday morning, drove from the hotel to the venue for the awards ceremony.  Smoke poured from the engine compartment.  No idea.  After the ceremony, ran the engine in the lot for 10 minutes.  No smoke, no codes, but found an EGR leak under the EGR tube, by the mount plate.  Drove home, service engine light.  I guess it needs a new gasket.  Again.  No smoking or other issues.

Going to check fluids after the engine cools.  Maybe tomorrow.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 18, 2018, 10:48:36 am
Checked the engine oil.  Below the add line.  Puddle under the Fiero.  Rrgh.

Transmission fluid is red and smells good.  Forgot it needs to be checked hot.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 02, 2018, 08:38:07 pm
After about 100 miles of driving, my SES light came on.  I need to figure out how to read it, so that I can fix whatever it is griping about.  I also heard a metallic sound like a chain is dragging, or someone is using a grinder.  I guess those dust shields are at it again.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 16, 2018, 08:20:02 am
It seems that something in my EGR setup is not flat, which is why I keep blowing gaskets.  I tighten the nuts down very tightly after the gasket between the mount block and the crossover pipe blew, last time.  This time, the gasket between the mount block and the EGR adapter blew.  Maybe it just doesn't like that heat-treated mount block.
Title: Re: Misc Fiero issues
Post by: Fierofool on September 16, 2018, 11:47:25 am
Is the gasket blowing in the same area each time?  This is the only report we've had of any gasket failures with the adapter kit.

Using the picture in the Merchandise section, indicate the area on the adapter plate where the gasket is blowing.  Maybe it will help us to diagnose it. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 17, 2018, 08:11:28 pm
Well, I checked the gasket between the adapter and the mount block.  It was intact, but that was where I felt the leak.  So, I pulled the mount block.  That gasket looked like this, by the time I got the mount block off.



I think this gasket was a week old, a few hundred miles of driving.  No purple gasket left.  I marked both the missing pieces, and the piece that fell into the y-pipe.

I was not implying an issue with the EGR adapter.  I think the issue is the mount block.

Anyway, I replaced the gasket, again, and tightened the heck out of the nuts.  I'll drive it for a few days to see what happens.
Title: Re: Misc Fiero issues
Post by: Fierofool on September 17, 2018, 10:32:06 pm
I was asking about the adapter plate in case we needed to make some changes in it. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 17, 2018, 11:05:51 pm
We'll see, but I don't believe so.  Thanks for being open to the possibility, though.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 27, 2018, 08:04:13 pm
I have a fear that the seals on my engine are blown.  I lose a lot of oil.  The gauge reads 80 PSI, until the engine warms up, at which point the gauge drops to about 60 PSI.
Title: Re: Misc Fiero issues
Post by: Fierofool on September 27, 2018, 08:16:34 pm
I would check the hot oil pressure at idle, with a mechanical gauge.  Then you can determine if your electric sending unit and gauge are accurate.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 27, 2018, 08:19:22 pm
Initially, I was told that the high oil pressure was normal.  It has the TFS oil pump in it.
Title: Re: Misc Fiero issues
Post by: Fierofool on September 27, 2018, 08:21:07 pm
Still, it's good to know what the real pressures are and if your electric system is working correctly. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 27, 2018, 08:22:25 pm
True.  I'm working on that.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 30, 2018, 04:11:57 pm
It seems that my TCC is bad.  Rrgh!
Title: Re: Misc Fiero issues
Post by: Fierofool on September 30, 2018, 05:09:08 pm
Don't you have one of the later transmissions?  Wonder if it's as easy to replace?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 30, 2018, 05:13:57 pm
It's a '92, I think.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 07, 2018, 08:52:09 pm
I am having the oddest issue, where there is an i termittent sound.  This sound sounds like the bathroom faucet is turned on and water is pouring out, then the faucet is turned off, just like a faucet.  The engine sound does not change, and I'm unable to find any other effects.  The sound often starts after I hit a bump.  Sometimes, letting off the accelerator causes the sound to stop, or at least the sound stops at that time.  Not always, though.
Title: Re: Misc Fiero issues
Post by: TopNotch on October 07, 2018, 09:28:07 pm
I am having the oddest issue...
Have you ever gone a week without an issue? The Fiero gods must not like you.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 07, 2018, 10:00:22 pm
Um, yeah, but not lately.

On the other hand, some people apparently either don't notice or don't care about these things
Title: Re: Misc Fiero issues
Post by: f85gtron on October 09, 2018, 04:06:56 am
Sounds like heater core noise. Air gets trapped in them. Sometimes, when it works it’s way out, it makes other, more concerning noises as it burps out of the front reservoir.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 09, 2018, 08:09:12 am
Could be, but the sound seems to come from the driver's side.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 09, 2018, 09:11:27 am
How are your brakes?  Do you have a high idle?  Maybe it's a vacuum sound around the brake booster?  Otherwise, there's nothing on the driver's side that could make any sounds, other than the headlight motor and that shuts down via the module, or the water rail where it comes up to the top of the radiator. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 09, 2018, 09:15:30 am
My brakes are great.  Not coming from the booster, but I thought of that, since that happened with 2 prior boosters.  My idle is about 750.  I'd like to bump it about 100 RPM.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 09, 2018, 08:41:58 pm
Advance your timing a couple of degrees if you can get someone to modify your chip.   
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 09, 2018, 08:52:34 pm
I'll probably pull the engine, replace all the seals, fix a few other things, maybe add the knock sensor, before I'll change the timing in the chip.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 09, 2018, 08:58:55 pm
Hope you have an inside place to do it.  I've worked in winters up there.  I know what it's like outside. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 09, 2018, 09:00:53 pm
No, no.  I'll have it done.  No time to do it, nor the tools, nor the confidence.

I haven't pulled any engine myself since the '80's, when I changed a seized V6 to a V8 in a pickup truck.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 16, 2018, 07:01:23 pm
My Fiero is due for new tags, so I determined to take it to get inspected.  Sure enough, it sprung a leak.  The engine bay was already hot, so I took it, anyway.  I wonder if it'll pass.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 19, 2018, 09:53:51 pm
Passed!
Title: Re: Misc Fiero issues
Post by: PK on October 20, 2018, 02:37:51 am
Woohoo well done.  Does the inspection last a year?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 20, 2018, 05:28:49 am
Renewals are for 1 or 2 years.  I guess the inspection lasts for 2 years.

My Fiero has a lot of non-stock items, so that first inspection after the swap (this inspection) is a bit of a worry.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 02, 2018, 02:14:44 am
Anyone ever have an issue where, as your Fiero slows to a stop, the engine suddenly has a surge of power?
Title: Re: Misc Fiero issues
Post by: Raydar on November 02, 2018, 05:40:48 am
When you're coasting, the Decel Fuel Cutoff kicks in. Essentially turns the injectors off.
As you're about to stop, it probably kicks the fuel back on, to stop the engine from stalling.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 02, 2018, 06:14:09 am
This is a recent thing, and is very annoying.
Title: Re: Misc Fiero issues
Post by: Raydar on November 02, 2018, 08:39:43 am
How is your idle speed? If it's idling too high, it will make it much more noticeable.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 02, 2018, 08:45:04 pm
The idle is about 850 RPM.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 10, 2018, 08:09:15 pm
Fired up my Fiero today.  Ran rough for a few minutes, and smelled like raw fuel.  Ran like a champ for 189 miles, but a bit warm.  Got to the library late, so it was closed.
Title: Re: Misc Fiero issues
Post by: TopNotch on November 10, 2018, 09:13:42 pm
Ran like a champ for 189 miles, but a bit warm.  Got to the library late, so it was closed.

189 miles to go to a library? That's what I call dedication to reading! ;)
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 10, 2018, 10:22:39 pm
Um, the scenic route.  Probably fewer than 5 miles.  However, I have the entire set of Great Books, a collection of several hundred novels, the complete works of several authors, and other interesting reads in my own library, so don't have to go far.  I borrowed a bunch of books 2 weeks ago, and the books were due today.

I'm a country boy, though.  189 miles for a good book isn't unusual.  Growing up, it was 7.5 hours in drive time, round trip, to go to the big library.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 18, 2018, 09:29:34 am
I am not sure why, but most of my idiot lights seem to have quit working.  The e-brake light does not come on, for example.  I get the SES and ajar lights.  The turn signal indicators work.  I think that's it.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 16, 2018, 09:43:00 pm
The safety belt warning light worked briefly.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 16, 2018, 09:48:33 pm
I am having the oddest issue, where there is an i termittent sound.  This sound sounds like the bathroom faucet is turned on and water is pouring out, then the faucet is turned off, just like a faucet.  The engine sound does not change, and I'm unable to find any other effects.  The sound often starts after I hit a bump.  Sometimes, letting off the accelerator causes the sound to stop, or at least the sound stops at that time.  Not always, though.

I drove about 400 miles today to get a picture.  Aside from the check engine light coming on when I let off the throttle, and the EGR gasket blowing again, it was a nice drive.  But that noise is getting more frequent--and apparent.  I guess soon it'll be easy to diagnose.

It could be the heater core thing.  One thing I noticed, is that the gauge indicates hot, for the first 30 miles or so of a run, then runs exactly at 220.  Not hot, as in in the red, but just below that.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 14, 2019, 05:16:20 am
What happens if your valve seals leak?
Title: Re: Misc Fiero issues
Post by: Fierofool on February 14, 2019, 09:36:12 am
The engine will burn more oil than if they don't leak.  Leaky oil seals are generally indicated by a puff of blue smoke upon starting a cold engine. 

During operation, oil is pumped up to the valve train and some of it runs down the rocker arms onto the valve springs and valve stem.  There is also some oil splatter.  This lubricates the exposed portion of the valve stem as it moves up and down through the valve guide.  The valve stem seal is located just inside the top of the valve stem guide. 

When the engine is stopped, residual oil flows down the valve stem and puddles on top of the seal area.  If the seal is worn, the oil will seep past it and travel down to puddle on top of the valve if it's closed.  If it's in an open position, it continues to collect in the combustion chamber. 

Upon starting, this oil is quickly flashed off in the initial combustion cycles, creating the brief blue cloud.  If it continues, it could be an indication that the seals and or guides are badly worn, or that the cylinder bore and rings are worn beyond service limits. 
Title: Re: Misc Fiero issues
Post by: Raydar on February 14, 2019, 12:23:06 pm
Leaky valve stem seals were a common issue with '80s GM engines. Especially 305 V8s. (I owned one.)
The general consensus was, "If it's not going through a lot of oil, don't worry about it."
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 14, 2019, 05:34:16 pm
I have a cloud for a few minutes at startup, then go through about a quaet of oil every 200 miles.  There are external leaks also, though.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 19, 2019, 09:30:25 pm
My Fiero seems to run terribly for the first several minutes after start, as if it's flooded.  The injectors are new, the FPR and MAP are about 3 years old.  Yes, there could be faulty parts.  The thing is, it is completely inconsistent.  It may start up smoothly, or not.

Lately, I'm wondering if it is sensitive to humudity.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 24, 2019, 09:31:06 am
Where can I get a scan tool to reset a code on the 7730?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 04, 2019, 05:58:57 pm
TFS says there have been no such issues with the heat-coated EGR mount plate.  They suggested that I find out why the exhaust is getting so hot.  Surely, that much heat would cause problems for other gaskets, as well, such as the one on the top of the mount plate.

The only real complaint I have about the engine is that the MPG is low.  The flooding/burning oil should be a separate issue, but perhaps not.

Well, TFS has the heat-coated EGR mount blocks back in stock.  Pricey.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 31, 2019, 04:04:22 pm
I would check the hot oil pressure at idle, with a mechanical gauge.  Then you can determine if your electric sending unit and gauge are accurate.

Well, this is fun.  These gauges are hard to come by.
Title: Re: Misc Fiero issues
Post by: Fierofool on March 31, 2019, 07:45:47 pm
The auto parts stores sell the gauges that mount underneath the dash and usually have a long coiled nylon pressure tube.  I have a SunPro and another brand, but you can get them at Advance.

https://shop.advanceautoparts.com/p/bosch-gauges-style-line-2-mechanical-oil-pressure-gauge-white-face-fst-8206/10717222-P?searchTerm=oil+pressure+gauge
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 31, 2019, 09:17:40 pm
Yes, that is the other one at which I was looking.  I was trying to avoid having to wire it, or is that only for lighting?
Title: Re: Misc Fiero issues
Post by: TopNotch on March 31, 2019, 10:15:48 pm
Wire it for lighting, plumb it for pressure.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 31, 2019, 10:27:37 pm
So, it will read the pressure without connecting any wiring?
Title: Re: Misc Fiero issues
Post by: Fierofool on March 31, 2019, 10:54:21 pm
Yes.  The tubing stated in the link is 72 inches and it provides pressure to the gauge.  Much longer than the ones I have.  They were more or less designed for front engine cars.  I only use it to get a true reading to compare to the stock gauge.  They usually have a small bulb about the size of an incandescent flashlight bulb that provides lighting. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 07, 2019, 12:15:22 pm
Slowly getting everything fixed.  Probably pulling the cradle again to replace a cam seal and to rebuild the transmission (again).
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 08, 2019, 05:13:17 pm
What is the likelihood of blowing 3 brake boosters?  I had diaphragms go on 2, and I think there is something wrong with this one.  I suspect that the sound I'm hearing is from the check valve.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 27, 2019, 08:59:46 am
Wellllll, the smell of fuel is strong on start.  It burns my eyes.  But I get 35 MPG or better.  It almost seems as if the injectors are leaking.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 27, 2019, 12:53:57 pm
How long does it take for bushings on new shocks to dry-rot?  2, 3, 5, 7 years?
Title: Re: Misc Fiero issues
Post by: Fierofool on April 27, 2019, 04:30:59 pm
I think my 87 was still on the originals when the shocks were replaced some 6 or 7 years ago. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 27, 2019, 04:33:07 pm
Mine are cracked, but were supposed to have been replaced just before 2014.  As I look at the condition, I have a hard time believing that these were replaced.  Is there any way to tell?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 04, 2019, 09:00:40 am
It looks as if the front shocks have to be replaced...again.  So, the front will be pulled out.  No telling what else will come up.
Title: Re: Misc Fiero issues
Post by: NoMad on May 04, 2019, 04:15:35 pm
I wanted the certainty, thats why I just did the whole suspension worth of bushings, shocks, struts, and mounts when I bought the formula fastback.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 04, 2019, 04:50:39 pm
I had replaced everything, except the front sway bar bushings, front ball joints, and front control arm bushings.  I know the '88 does not have ball joints or control arms in the rear.  There is nothing wrong with my ball joints or control arm bushings.

Edit: I do have all new engine and transmission mounts.  Everything related to suspension in the rear has been replaced, except the springs and the actual sway bar.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 15, 2019, 09:04:04 pm
Apparently, the valves being out of adjustment damaged the lobes on the camshaft, so, will have to pull the camshaft.
Title: Re: Misc Fiero issues
Post by: Fierofool on May 15, 2019, 09:40:55 pm
If you're going to do that, you need to replace the lifters, too.  Maybe with a slightly higher lift cam? 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 15, 2019, 09:43:30 pm
The lifters are easy to replace.  Cheap, too.  Everything is already apart, so no additional work.  Just tired of pulling the engine.
Title: Re: Misc Fiero issues
Post by: Fierofool on May 15, 2019, 09:54:39 pm
Yeah, what I meant is that you don't want to install a new cam with old lifters.  You want cam and lifters to wear and lap in together. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 15, 2019, 10:06:30 pm
It will also get another new timing chain.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 25, 2019, 07:04:01 pm
Went for a drive.  Of course, no AC.  Then the HVAC fan acted up.  It seems that's what's been making the water rushing sound.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 26, 2019, 01:04:13 pm
As if no AC wasn't bad enough, today has not been my day.

Someone broke into my truck last night, and stole my Mentos.

Today, my Fiero will not idle, so I have to keep 1 foot on the gas.  Rather inconvenient.  While driving through the road destruction, the idle drops, so the engine dies.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on May 28, 2019, 10:10:48 pm
Well, apparently the EGR leak caused the dying issue.  Ixm changine the EGR mount block to try to stop going through gaskets every 150 or so miles.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 08, 2019, 09:10:58 pm
The large temp swings were caused by air in the coolant system.  So, progress.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 20, 2019, 09:22:26 pm
I am debating going back to a distributor to solve some runability issues.  My hesitation is that there did not seem to be a problem for others in the club with a 7730 and DIS.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 27, 2019, 05:36:40 pm
Well, my MAP sensor is whacko.  The voltage is all over the place, so the ECU is making the engine run pig rich.  Replaced the MAP sensor, no change.  Checking the wiring harness.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 27, 2019, 06:30:23 pm
LOL!  My MAP sensor voltage is all over the map.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 01, 2019, 05:49:44 pm
Well, tried 6 spare MAP sensors.  No change.  Lost more hair.  Put my MAP sensor on another Fiero.  That Fiero would not start.  Swapped MAP sensors back, other Fiero ran great.  Tried 7th MAP sensor on my Fiero.  My Fiero ran much better, but there are still idle issues.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 01, 2019, 06:56:52 pm
Well, the idle issues were caused by the IAC, which was bad...again.  Rrgh!

Now on to the oil loss issues.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 02, 2019, 07:48:42 pm
Apparently, oil in a running engine is under pressure.  The suspicion was that the distributor O-ring was leaking.  Maybe a quart every few hundred miles or so.  The thing is, there was no evidence of a leak, other than a puddle and missing oil.  So, the engine was running, and observation was in progress, when a geyser of oil suddenly erupted.  The O-ring is toast.  I guess it is safe to say that the leak is coming from the O-ring.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 06, 2019, 09:42:24 am
The Fiero is back together, but there may be an issue with the cat.  Hoping that a drive of several hours will clear this up, on the theory that the cat will get hot and burn out whatever is bothering it.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 08, 2019, 08:37:16 pm
Still tracing oil issues.  The next thing to check is the valve seals.  Will probably replace the seals, then the oil pressure sender.

The compression in each cylinder is between 175 & 180 PSI, so the rings appear to be tight.  3 PSI variance between cylinders would seem to be acceptable on a street car.

Replacing the plugs again.

Going to add a paper gasket to the "distributor".
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 14, 2019, 09:13:42 pm
Where my coolant tubes pass under the front crossmember, the tubes do not fit properly into the retainer.  There are rubber pieces on the tubes.  The retainer and clamps have been removed, but the dang tubes aren't cooperating.

My new AC dryer fell apart, meaning that the weld between the top and bottom came apart.  Annoying.  At least it wasn't installed yet.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 14, 2019, 10:10:56 pm
Yes, the oil is under pressure.  It's pressurized by the oil pump and pushed up through the oil galleys to lubricate the rod and main bearings, pressurize the valve lifters and pump oil up through the pushrods to the rocker arms and valve springs.  It also pushes oil to the cam journals and there is a hole in the side of the block where the distributor installs.  Excess oil from the cam bearings exits this hole and runs down the distributor shaft to help lubricate it since it doesn't get a lot of oil splash from the bottom end. 

Driving a car with a clogged cat won't burn out the blockage.  Remember, that part of the exhaust system gets hot enough to glow and can easily cause a fire if one should park over an area with high grass.  Driving it may cause some of the chunks to dislodge and pass on into the muffler or even be expelled out the exhaust, but the material won't burn away.  It's more likely to clog the muffler. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 14, 2019, 10:14:25 pm
It is just stinky--or was stinky, when it was running.  The goal is to have it running again, later this week.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 15, 2019, 08:05:48 pm
There seemed to be some issues with the brake line routing, so that was addressed, today.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 18, 2019, 06:30:39 pm
The current theory is that the old IAC was causing the faucet noise.  The engine now starts and runs smoothly.  The AC blows cold, again.  The oil pressure is good, and the temp reads correctly.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 19, 2019, 05:23:17 pm
Well, my gauge is calibrated, but but the gauge and the ECU are off by the same amount.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 19, 2019, 10:13:14 pm
Most of the fuel smell is gone.  Supposedly, a few more heat cycles should clean out the rotten egg smell from the catalytic converter.

New problem.  There seems to be feedback through the speakers while the radio is off.  Maybe just 1 speaker.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 20, 2019, 09:47:53 pm
Drove and cooled off.  Drove and cooled off.  Drove and cooled off.  Got stuck in construction traffic for 11 miles.  Stop and go.  Mostly stop.

No check engine light, no dying, no faucet sounds.

Tried some highway, and some city.  Repeatedly came off highway and idled at a stop.  No dying.

Brakes seemed a bit soft, so bled the heck out of them.  Supplied a transfusion of DOT3.  I guess it is what it is, but think the rear pads are probably soaked with oil, and need to be replaced.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2019, 07:28:44 am
I'll have to run a few tanks of fuel through, but my MPG seems to have taken a slight hit.  Maybe because I was doing some hard acceleration.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 21, 2019, 07:55:58 am
Believe me, the urge is strong to step on it with the 3.4.  My mileage sometimes gets down in the low 20's, but on my trip to and from Carlisle, I got as high as 34 mpg.  It doesn't take much to suck up the mpg. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2019, 08:20:58 am
I hadn't been having any issues getting 35 MPH on the highway, even with some city driving.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2019, 08:23:17 am
Somehow, my formerly-quiet Fiero now has door rattle.  Not sure how that happened.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 21, 2019, 09:07:52 am
I hadn't been having any issues getting 35 MPH on the highway, even with some city driving.

Try driving in Atlanta traffic.  You won't get over 15 MPH.    ;)  And probably not over 15 MPG either. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2019, 11:52:40 am
That is why I don't live in Atlanta.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2019, 01:54:44 pm
Somehow, my formerly-quiet Fiero now has door rattle.  Not sure how that happened.

Tightened the door everything.  Seems to be quieter.  Maybe my imagination?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 21, 2019, 11:05:09 pm
No check engine light, no dying, no faucet sounds.

Typed too soon.  The check engine light did come on, once.  I don't know why, yet, but will investigate after the engine bay cools off.

It did die on me.  Apparently, no driving, while the engine is warm.

I think the faucet is not the IAC.  Much worse.  It also sounds worse, now.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 22, 2019, 08:47:59 pm
Fixed the right blinker indicator (or lack thereof) by putting the bulb in the correct socket.  This also fixed the issue of the hazard lights blinking very slooooooooowly.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 24, 2019, 06:42:45 pm
More check engine lights today.  Coming off the highway.  Last time, it was after I passed someone.  Checked EGR area.  No leaks apparent.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 25, 2019, 07:40:28 pm
The temperature issues seem to be resolved.  The gauge shows slightly below 220, most of the time.  Sometimes a bit lower, sometimes right on 220.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 25, 2019, 07:51:52 pm
True temperature should show just shy of the needle being straight down. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 25, 2019, 07:54:17 pm
Yep.  It does.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 25, 2019, 08:14:51 pm
Like maybe 2 marks below 220?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 25, 2019, 09:03:57 pm
It gets down that far, but usually touches the center mark.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 27, 2019, 07:44:51 pm
Yesterday, I discovered a 1/8th" crack in my dash.  I did not grant permission for my dash to crack, nor do I find this acceptable.  Currently searching for methods to fix this.
Title: Re: Misc Fiero issues
Post by: Fierofool on July 27, 2019, 08:11:02 pm
Tilt column downward---remove main instrument pod---remove auxiliary gauge pod---remove radio surround soft vinyl---remove speaker grills and speakers---remove dash---install replacement dash---follow previous steps in reverse order.

That's the only way I know.    :(
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 27, 2019, 08:12:58 pm
Nice dashes are hard to come by.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 28, 2019, 07:40:07 pm
True temperature should show just shy of the needle being straight down.

Continuing to monitor this.

5 hours of driving with it here:


Sometimes here:


Sorry about the poor picture quality.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 29, 2019, 07:30:11 pm
Ryan thinks my chip burn may not have taken correctly, and will have to be burned again.  Rather than have my Fiero down, I plan to source another chip.

It does not seem likely that a bad burn would function at all, but not my thing.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 29, 2019, 08:01:49 pm
My Fiero idles about 650 RPM, once warmed up.  That is certainly as low as I believe it can idle. I think 850 RPM would be better, although my trucks idle at 400 RPM.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 04, 2019, 01:22:37 pm
My idle is low, around 650RPM when warmed up.  If I hit the throttle, the RPMs drop before increasing, znd the engine almost dies.  I'm trying to figure out how to fix this.  In drive, the RPMs are a bit higher at idle, but I get the same behavior.  The TPS is suspect, of course.  No vacuum leaks apparent.  Any ideas?
Title: Re: Misc Fiero issues
Post by: TopNotch on August 04, 2019, 03:52:37 pm
The Fiero throttle body is supposed to be mechanically adjusted to permit idle at 600 RPM even if the idle air control is stuck closed. A malfunctioning IAC could be the cause of your problem.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 04, 2019, 06:06:55 pm
The IAC has been replaced twice in the last year, including the last time, which was 3 weeks sgo.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 10, 2019, 02:26:11 pm
Replaced the IAC, again.  No change.

Replaced the O2 sensor.  Oddly, that made the rich issue worse.  So, I guess I'll put the old sensor back in.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 14, 2019, 09:53:20 pm
Is it dooable, to replace the water pump without dropping the cradle?
Title: Re: Misc Fiero issues
Post by: TopNotch on August 14, 2019, 10:00:01 pm
Is it dooable, to replace the water pump without dropping the cradle?
Yes, but it's been a while since I did one (way back when I had my red SE), and I can't remember a lot of the details. I do remember that you have to be very careful tightening one of the bolts.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 14, 2019, 10:02:18 pm
Very careful....?  Not to cross-thread?  Not to over-tighten?  Not to catch something?
Title: Re: Misc Fiero issues
Post by: TopNotch on August 14, 2019, 10:32:11 pm
Not to over tighten. There is air beneath one of the bolt holes, and if you over tighten, you'll break your brand new water pump. Most come with a warning sheet about that in the box.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 14, 2019, 10:34:15 pm
Thanks.  Good to know.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 17, 2019, 09:20:13 am
Replaced some sensors.  My Fiero was ready to go for a test drive...but it's hailing.  Maybe another day.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 17, 2019, 05:38:26 pm
The hail quit, so I went for a drive.

Here is the new VSS, as received:


With a bit of elbow grease, it looks a bit better:


The speedo is still 10 MPH off.  >:(

The new VSS gear does have an additional tooth.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 17, 2019, 05:42:02 pm
Now on to my water pump.  I think it's bad.  Here is my reasoning.  It tends to get hot when the RPMs are higher, but stays cool when at lower RPMs--even through stop-and-go traffic.

If the coolant is getting hot, I can shut off the engine, and restart, and it will cool off, for as long as I run lower RPMs.  Basically, at idle.

Since the water pump is driven by the engine, the higher the RPMs, the faster the water pump turns.

I believe I have one with a plastic impeller, and the impeller is loose on the shaft.

Of course, the proof is in the pudding, but is my reasoning sound?  I don't want to replace the water pump for nothing.
Title: Re: Misc Fiero issues
Post by: NoMad on August 18, 2019, 11:59:59 pm
I have checked by pulling the belt and the hose from the pump so I can reach in and try to hold the impeller and turning the pully. If it moves then it is loose on the shaft.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 19, 2019, 12:04:21 am
Thanks.  I'll try that.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 19, 2019, 08:29:56 am
The impeller would be inaccessible when the pump is installed.  How do you do that?  Remove the pipe plug or pipe nipple? 
Title: Re: Misc Fiero issues
Post by: NoMad on August 19, 2019, 03:53:53 pm
Last one I checked that way I used a plastic pry tool through the outlet and pressed it into one of the holes in the portion of the impeller that was visible. Wasn't on a fiero though. Was on a Camaro 3.4 if I remember correctly.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 19, 2019, 06:03:43 pm
Probably easier to just replace the pump.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 20, 2019, 09:27:35 pm
Well, I had a lengthy conversation with several people about my temp gauge issue.  It seems that the next step is to somehow read the values off the ECU while driving.  Still trying to find a reader.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 21, 2019, 08:55:44 pm
Not to over tighten. There is air beneath one of the bolt holes, and if you over tighten, you'll break your brand new water pump. Most come with a warning sheet about that in the box.

I cannot find such a bolt.  Maybe after the pump is off.
Title: Re: Misc Fiero issues
Post by: TopNotch on August 21, 2019, 10:08:53 pm
If the pump is still mounted, there will be a gap between the pump and the surface it's mounted on at one of the bolts. I don't remember if it's where you can see it with the pump mounted, but it's there.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 21, 2019, 10:12:44 pm
I believe the surface is the timing cover.

I think some RTV got into the impeller.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 22, 2019, 07:25:38 pm
Does 4-5 hours seem a reasonable amount of time to replace a water pump, out the door?  I am sure I cannot do it in 2 hours, even if I had all the tools ready to go.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 22, 2019, 07:33:30 pm
Probably so for someone that's never changed a Fiero pump.  Doing it in the car is supposed to be a real pain.  Just make sure they have the special clamp and instructions on how it's to be used before letting them have at it else you could end up with water in the oil pan. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 22, 2019, 07:35:17 pm
Special clamp?
Title: Re: Misc Fiero issues
Post by: PK on August 23, 2019, 01:09:28 am
I did mine recently so if you need any info/pics I can maybe help.

I think it's #12 bolt that has a void behind so don't overtighten.  I made a cotton reel shaped spacer to spread the load there.

The clamp holds the timing cover tight so that water doesn't end up in your oil!!  You will need the clamp or homemade version.

The most onerous part of the job on mine was removing the old gasket detritus.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 23, 2019, 07:53:27 am
Where does the clamp go?
Title: Re: Misc Fiero issues
Post by: TopNotch on August 23, 2019, 10:09:39 am
Where does the clamp go?
It's used to hold down the top of the timing cover while you have the pump off. See this thread (http://www.fiero.nl/forum/Forum2/HTML/132534.html) on Pennock's. The thread also shows the bolt with the gap that you must not over-tighten.
Edit: I think the torque for bolt 12 in the pictures showing torque values is wrong.
Title: Re: Misc Fiero issues
Post by: TopNotch on August 23, 2019, 10:50:06 am
I found a procedure here (http://www.mtritter.org/fiero/fierohelp/waterpump.html). I don't recall having to go through the wheel well when I did mine, but it might make it easier. This procedure doesn't mention the timing cover clamp.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 23, 2019, 06:27:20 pm
Hmmm.  Maybe my 5-hour estimate was low, if it took him 5 hours.

Thanks for the write-up.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 23, 2019, 08:28:29 pm
I cannot find any reference to this clamp.  I just don't understand where/how the clamp would be used.  No coolant should be present while the pump is off.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 23, 2019, 09:29:18 pm
The problem is that the pump sticks to the timing chain cover.  With all the bolts removed, it causes an area of the cover to separate and can cause an oil leak and water leak where the water jacket passes through the timing cover.  There is a picture of the clamp in those links.  I looked at it.  There's also a picture showing the space between the ear and timing cover that will break if tightened too much. 
Title: Re: Misc Fiero issues
Post by: TopNotch on August 24, 2019, 08:23:04 am
Let's see if this works...
The clamp is the shiny thing under the large black wire bundle.

Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 24, 2019, 08:28:31 am
Top middle?  I was picturing a hose clamp type of thing.  Hmmm.  I guess that could be made, easily enough.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 24, 2019, 03:42:00 pm
That is the clamp.  Some pumps come with it and some don't .
Title: Re: Misc Fiero issues
Post by: PK on August 25, 2019, 03:31:02 am
Sadly not possible to post pics from phone here.

I have a hold bracket template should you need to make one.   

Took me a while to work out why my bracket didn't fit at first...the alternator bracket needs removing first!!

Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 25, 2019, 05:41:56 am
Joy.  Well, at least that tip should save me some time.

I still can't figure out why the bolts are all different sizes.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 14, 2019, 06:33:46 pm
I drove my Fiero a lot, this week, trying to get to the bottom of the temp issue.  Here are some things I tried:
1. Remove the thermostat.  No change, other than MPG, and it takes a while to heat up.
2. Leave the AC off.  No change.  The radiator/cooling fan does still come on, which leads me to believe that the temp gauge and CTS do aagree.  Considering that the heat in the front compartment is considerable, and the hose from the engine is very hot, I think the coolant is circulating.

I considered replacing the temp gauge sender again, but that doesn't seem to be the issue.  The thermostat has already been replaced, but removing it would isolate the problem, anyway.  All the coolant hoses have been replaced.

The last thing I'm thinking may be the issue is a slight crimp in the passenger-side coolant tube.  Ever since that happened, my temps have randomly been high.  Since there was so much other stuff done at the same time, I haven't gotten to that, yet.

The engine never runs as if it's overheating, but it sure is warm.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 27, 2019, 07:09:49 pm
I'm being told that my rings still aren't seated.  I have 9,xxx miles on these rings.  I would think they'd be seated, by now.  Any opinions?
Title: Re: Misc Fiero issues
Post by: NoMad on September 28, 2019, 08:07:00 am
How does the coolant look? Would it be worth descalling the cooling system with a rust remover? I will see how the thermocool goes in mine and report back but might be wprth a shot.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 28, 2019, 08:23:52 am
My coolant looks just like it came out of the jug.
Title: Re: Misc Fiero issues
Post by: NoMad on September 28, 2019, 12:49:23 pm
And this is a new radiator too right?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 28, 2019, 12:51:12 pm
Yes.  New radiator, new water pump, new hoses, new thermostat.
Title: Re: Misc Fiero issues
Post by: NoMad on September 28, 2019, 12:55:26 pm
Ya, super unlikely it would be scalling then. Your idea of the crimped pipe sounds about right.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 28, 2019, 12:59:20 pm
Planning to get another pipe.  Maybe this one can be repaired, later on.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 04, 2019, 05:43:39 pm
With the white VSS speedo gear, my check engine light has not come on.  With the blue gear, the check engine light came on when I let off the throttle...sometimes.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 09, 2019, 05:57:15 pm
Today, I discovered that my ECU is programmed for a 180-degree thermostat.  Interesting.  I wonder what issues that would cause.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 09, 2019, 09:15:41 pm
If you're running a 195 thermostat, the fan will come on long before the thermostat opens, possibly making the fan run constantly and maybe not reaching operating temperature.  MPG could suffer. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 09, 2019, 09:18:03 pm
I can understand the fan running more; however, since coolant is not circulating, the engine should not know that the fan is running.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 13, 2019, 10:40:09 pm
With a different VSS, the check engine light came on, and the speedo is off by about .5 MPH at 60 MPH.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 14, 2019, 05:44:53 pm
A 25-amp fuse blew.  Today, I wanted to test, so I replaced it with a 5-amp fuse, but can't get it to blow.  If I pull the fuse, the things on that curcuit do not work.  Maybe there's a trick to it.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 14, 2019, 08:28:07 pm
With a different VSS, the check engine light came on, and the speedo is off by about .5 MPH at 60 MPH.

There are comparative tables that I heard Raydar refer to as 'Lookup Tables' where info from one sensor should fall within range of info on another table.  TPS and VSS for example.  The TPS should be reading at a certain level when the VSS output is at a certain level. 

When my 2nd 85 broke the VSS shaft and gear, the car ran horribly because that input was telling the ECM that the car wasn't moving though the TPS said it should be.  Air/fuel was affected, too because the ECM was trying to correct input for an engine that was supposed to only being revved according to the info it was receiving.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 15, 2019, 07:19:33 pm
I installed the 180-degree thermostat, today.  Now to get the rain turned off.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 16, 2019, 08:10:58 pm
Went for a drive.  Well, the gauge gets slightly past the 220 halfway mark, but can also move down to half of that.  Hmmm.
Title: Re: Misc Fiero issues
Post by: Fierofool on October 16, 2019, 08:14:00 pm
You need an infrared thermometer to check the temperature on the thermostat housing and compare it with the gauge. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 16, 2019, 08:15:25 pm
Yeah...  Or the fan unclogged.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 17, 2019, 11:24:13 pm
I've been pulling logs from my Fiero for analysis.  Today, I noticed that the log showed knocks.  Interesting.  I do not have a knock sensor.  It also showed "knock advance".  Also interesting.

It seems that my air/fuel mixture is off.

My "desired idle speed" gets down below 625.

And the idle drops when shifting into gear.  I thought someone posted on here that their idle increased.

The gauges read exactly what the ECU shows, which I guess is a good thing.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 18, 2019, 08:51:58 pm
This SES light is really annoying.  No codes.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 20, 2019, 09:43:00 am
You need an infrared thermometer to check the temperature on the thermostat housing and compare it with the gauge.

I wonder.  If the CTS and temp gauge sender show different values, what could be the cause?
Title: Re: Misc Fiero issues
Post by: Fierofool on October 20, 2019, 01:29:42 pm
Either sensor could be inaccurate, the gauge could be inaccurate.  To determine which, remove the two sensors and allow them to equalize temperatures in the same environment.  Then, using a multimeter, check the resistance values against the chart on this forum.  If they both are close to one another, it would be the gauge.  If there's a wide difference, then one of the sensors. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 20, 2019, 01:31:36 pm
The gauge itself is accurate, although wiring is always suspect.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 21, 2019, 06:13:00 pm
Since there are oddball issues, I'm replacing the ECU.  My suspicion is that the problem is either the ECU or the chip.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 21, 2019, 09:14:14 pm
The ECU did not seem to help.  New chip on the way.
Title: Re: oil leaky, but Fiero wonky
Post by: GTRS Fiero on October 22, 2019, 06:22:06 pm
My SES light comes on, but no codes are set.  When I turn the ignition off and back on again, no SES.

Any idea how to read the code(s)?
Title: Re: Misc Fiero issues
Post by: TopNotch on October 22, 2019, 10:20:10 pm
In lieu of not being close enough to borrow my scanner, buy one of Oliver Scholtz's. It should be able to detect the problem.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on October 22, 2019, 10:22:53 pm
Oliver and I have been discussing that, but hit a small snag.  I have to wait for a few kinks to be worked out.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 02, 2019, 07:22:55 pm
The troublesome SES code has eluded me, yet again.  I think the code is not storing.  I tried 7 different readers, today.  Each of them gave me all sorts of info....but not any codes.

I think the AFR is wrong, but I'm not sure what it should be.

Also, what should the resting TPS value be?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 09, 2019, 05:14:17 pm
Without the thermostat, my Fiero got 14.01 MPG.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 09, 2019, 07:54:15 pm
Watching my oil pressure gauge today, the needle moved like the second hand on most clocks.  That doesn't seem right.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 14, 2019, 08:08:05 pm
Got the codes pulled today.  EGR and idle speed.  Joy.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 24, 2019, 06:31:00 pm
While looking at my door, today, I saw this:


Aaaaah!

What do you do to fix this?

Michael
Title: Re: Misc Fiero issues
Post by: Fierofool on November 24, 2019, 06:38:37 pm
That rubber piece is removable in order to replace dew wipes, etc.  But it appears there is something amiss with your dew wipe.  Not sure why there is that open space.  I'm tethered to a monitor at the moment and can't check my door to compare. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 24, 2019, 06:50:58 pm
I have not replaced my dew wipes.  They are still pliable, mostly straight, and have no cracks.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 24, 2019, 06:52:17 pm
I just checked and there's nothing unusual in your picture.  Same as mine. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 24, 2019, 07:04:14 pm
Whew!

My issue is that the upper left side is all cracked and ratty-looking.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 24, 2019, 07:29:01 pm
That's probably caused by weathering of the rubber and the edges break away. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 24, 2019, 07:35:52 pm
Yeah...but how do I fix it?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 25, 2019, 09:36:19 pm
I'm going to try making a new one.  In theory, I can make a wax mold, and start from there.  Or, I coild make a plaster mold, and coat it in veggie oil.  Dunno.  Never tried.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 26, 2019, 07:48:27 pm
Well, my new chip is ready.  Unfortunately, the weather is not.

There are entirely too many parameters to adjust.  Hopefully, things are right, this round.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 07, 2019, 10:02:14 pm
The new chip, with the new programming, is installed.  No SES light, no dying, and no rough idle in gear when stopped.  Started and ran cold.  Of course, only 40 miles, so far.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 14, 2019, 12:20:40 pm
I've been trying to find the oil leak source, but not lately; however, these pictures seem to indicate somewhere in this area.







That looks really nasty.
Title: Re: Misc Fiero issues
Post by: Fierofool on December 14, 2019, 05:10:03 pm
Crankshaft/timing cover seal?  Maybe the crankshaft has a groove worn in it?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 14, 2019, 06:28:02 pm
It sure looks rotational.

The crankshaft is supposed to be new.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 21, 2019, 11:38:49 am
Off and on, I've been testing my Fiero from a cold start.  No issues, thus far.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 21, 2019, 11:44:06 am
What am does this show?

Title: Re: Misc Fiero issues
Post by: TopNotch on December 21, 2019, 05:56:01 pm
It looks like a damper with timing mark and too much oil leaking out.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 21, 2019, 05:58:23 pm
So, the timing mark is almost aligned with the inspection tube?  Not that I need that notch.  Is that part with the notch the outer ring that slips?

What is that thing with the notches?

I'm going to deal with the oil.
Title: Re: Misc Fiero issues
Post by: Fierofool on December 21, 2019, 10:09:42 pm
The tube is used ONLY with the factory timing system.  When using a conventional timing light, the timing mark doesn't line up with the tube as your picture shows.  The serrated piece (with the notches) is what you use to time the engine with a standard handheld strobe timing light.  With the ALDL jumpered, the deep notch will line up with the 10 degree mark on the notched piece.  The notched piece is actually marked to tell you what degree each high point represents. 

Title: Re: Misc Fiero issues
Post by: GTRS Fiero on December 28, 2019, 09:45:16 pm
Several times today, I started my Fiero, and let it run until it got up to temp.  Each time, the engine started right up, ran smoothly, and had no trouble on tip-in.  Hopefully, this means that the run-ability issues have been resolved.

I need to do some fuel mileage runs, but after the streets dry up.  It's rainy and nasty outside.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 25, 2020, 10:54:43 am
I ran my Fiero long enough to warm the coolant.  Actually, the temp got several marks above 220.  The Fiero was parked, and air temp was below 30 degrees.  I shut the engine off, and grabbed the upper radiator hose.  Cold.  Computer shows temp is below 185, thermostat shows temp is below 185.  I have to believe there is a wiring issue, somewhere.
Title: Re: Misc Fiero issues
Post by: TopNotch on January 25, 2020, 11:16:54 am
How long did you run it? Even in cold weather, the hoses should get warm after a while. If not, there's either a blockage or the pump's not pumping.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 25, 2020, 11:34:34 am
Well, there is heat, so the pump is running.  The radiator hose should only get hot after the thermostat opens.

After shutting off the engine and restarting, the temp gauge showed a much lower temp.  The radiator hose did eventually get hot.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 27, 2020, 11:01:46 pm
If the balancer was replaced, but the seal in the timing cover was not, would there be a good seal?  Let me think...  I suspect not.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on February 02, 2020, 09:53:44 pm
One of my headlights did not want to pop up today.  I tapped the knob on top, and then it worked fine, and likely will continue to work fine, until I don't use it for a few months.  Rebuilding it was not so fun that I'd like to do it again, but that would seem to be the best option.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 01, 2020, 06:56:06 pm
For some reason, my Fiero is blowing the courtesy fuse, which kills my power locks.  Usually, I don't know the fuse is blown, until I go to lock the doors on exit.  No idea why it's blowing.
Title: Re: Misc Fiero issues
Post by: Fierofool on March 01, 2020, 09:36:41 pm
If you have a Haynes Manual, check to see what else is on the same circuit. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 01, 2020, 09:38:41 pm
I have the Haynes, and the Vhilton, and the FSM.  There seems to be a wire that shorts out while driving.
Title: Re: Misc Fiero issues
Post by: Slyp on March 02, 2020, 01:46:23 pm
That fuse is connected to trunk lite,trunk release, outside mirron, dome light,both door locks.  Check if you have a short with a meter by disconnecting them.  A bad bulb can cause a problem
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 02, 2020, 06:58:12 pm
Thanks.  I believe it's the trunk light.  I need to get a box of fuses.
Title: Re: Misc Fiero issues
Post by: TopNotch on March 02, 2020, 09:25:07 pm
If you can't find anything obvious, check the wiring that goes from the car to the trunk lid. That wiring is flexed every time you open and close the trunk. There could be damage in that area.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 02, 2020, 09:28:18 pm
Could be, but the trunk didn't open, this time.  Not looking forward to this.
Title: Re: Misc Fiero issues
Post by: NoMad on March 03, 2020, 02:01:18 am
I had this issue due to my trunk light grounding out. Look to see if yours has all four sides of the lens tangs that keep it on and off the metal.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 07, 2020, 05:18:38 pm
It didn't.

Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 07, 2020, 05:34:04 pm
I went to a parts store to get some fuses.  What a frustrating experience.  Since the employees at the front of the store were all standing by the door, asking what I needed help with, I told them, "smart fuses".  They directed me to aisle 2.  Well, aisle 2 did not have any fuses, but I saw fuses on an overhead sign in aisle 4, so headed there.  There were some fuses, but nothing compatible with the Fiero, and no smart fuses.  So, I grabbed a package, and walked up to the parts counter.  I told them that I didn't find any smart fuses.  He asked, "Would you like to buy those, instead?"  "No", I explained, "because they don't fit.  I'm looking for smart fuses."  He said they are at a home store.  Hmmm.  I asked if they didn't carry the smart fuses, anymore.  He said no, and again asked if I wanted to purchase the fuses in my hand.  Let me think...

At the next parts store, the employees told me that I should just buy whatever they had in stock, because all fuses are the same, and all fuses fit all vehicles.  Interesting point of view.  We looked, and they didn't have anything that would fir the Fiero.

At the next parts store, the employees didn't know what fuses were.  I couldn't help asking, "You do work here, don't you?".  They assured me that they did.  So, I asked, "This is an auto parts store, isn't it?"  They assured me that it was.  I agreed, "was" being the operative word.  They offered to google what a fuse was.  Very helpful.

At the next parts store, they had no fuses.  Just what every car owner looks for: a parts store without parts.  Maybe vehicles no longer need parts.  For sure, the people employed at these stores are not needed.

So, I went looking online.  Having never really thought about it, before, I always just got fuses that fit my application, but I have no idea what size these fuses are.  Not mini fuses.  What size am I seeking?
Title: Re: Misc Fiero issues
Post by: Slyp on March 07, 2020, 06:00:11 pm
Im not sure what you have but the bulb the goes in my trunk  87 GT looks like the trunk compartment bulk that is in the Fiero Store parts pg 96.   It doesnt have a circuit board, just a light
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 07, 2020, 06:03:32 pm
That light is an LED.
Title: Re: Misc Fiero issues
Post by: Fierofool on March 07, 2020, 08:16:02 pm
If you hooked the loops over the two tangs that stick up with the element facing the lens you would have more light.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 07, 2020, 08:21:08 pm
It doesn't stay in place, that way.  I was tempted to bend the ends.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 07, 2020, 08:21:55 pm
New problem: when I slow down, sometimes, the engine surges, several times.
Title: Re: Misc Fiero issues
Post by: Slyp on March 08, 2020, 10:46:30 am
When you have just a bulb, if it goes bad, it just ceases to light.  But with a circuit board if it shorts out you could have other problems.....  Just saying Newer may not be better....
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 08, 2020, 12:21:46 pm
The board is to connect all the LED's.

With all the new parts that have been bad, newer is clearly not better; however, the LED's draw less current, and therefore are better for the wiring and battery.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 08, 2020, 12:52:02 pm
Until I get the currect fuses, I put a 20-amp fuse in.  It calls for a 25-amp fuse, but I'm out of those.

There are 4 chips on the back of the board, but they appear to be to make sure that the LED's will work, whichever way the board is connected.
Title: Re: Misc Fiero issues
Post by: Slyp on March 08, 2020, 03:20:47 pm
I doubt that the trunk light draws very much current but each to his own
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 08, 2020, 05:28:19 pm
The trunk light will drain the battery, if left on during a car show.
Title: Re: Misc Fiero issues
Post by: Roger on March 10, 2020, 09:21:16 am
That trunk light WILL kill the battery. And NO, I will not tell you how I know. I replaced mine with a nice LED.
Title: Re: Misc Fiero issues
Post by: TopNotch on March 10, 2020, 09:53:16 am
For car shows, get one of Rodney's Trunk Light Eliminators. It holds the light switch open (and looks cool, too).

Title: Re: Misc Fiero issues
Post by: Fierofool on March 10, 2020, 01:46:57 pm
I was using a dime inserted into the trunk light switch on the GT to keep the light off during car shows.  Sometimes it would fall out and almost drain the battery.  Roger gave me one of his LED's and I can work on the car all day long without any noticeable drain.  But just to keep up with TopNotch's coolness, I also bought one of Rodney's Trunk Light Eliminators. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 10, 2020, 06:05:32 pm
I have Rodney's eliminator.  I believe it was highlighted in the June 2018 newsletter.  I used the eliminator at a show, but walked off to look at the other vehicles.  On my return, no more eliminator.  It was a windless day.  Some items that were down in my trunk were also missing.  I guess I could remove the fuse.  I had been using a battery disconnect, but that was removed by someone who worked on my Fiero.  Grrrh!
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on March 13, 2020, 07:50:50 pm
That fuse is connected to trunk lite,trunk release, outside mirron, dome light,both door locks.  Check if you have a short with a meter by disconnecting them.  A bad bulb can cause a problem

The fuses arrived, today, and all appears to be good.  I'm sure that the bulb contacts were shorting on the trunk wall.  Thanks, DeShoe.
Title: Re: Misc Fiero issues
Post by: Slyp on March 14, 2020, 06:31:02 pm
Glad I could help
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 08, 2020, 06:57:47 pm
Went for a drive in my Fiero.  No AC.  :(  The entire AC system has been replaced.   >:(
Title: Re: Misc Fiero issues
Post by: Slyp on April 09, 2020, 11:11:16 am
Freon leak?????
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 09, 2020, 05:28:25 pm
That was my first thought, as well.  It may be that, but how irritating!

I watched the compressor while someone hit the AC button.  I think the compressor isn't engaging.  The idle did not change, no load, nothing.
Title: Re: Misc Fiero issues
Post by: Slyp on April 09, 2020, 06:04:05 pm
You probably need to check and see if you have freon and there is  pressure in the system
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on April 09, 2020, 06:06:54 pm
Rrgh.  So, more AC work.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 07, 2020, 06:39:35 pm
My poor Fiero seems to have a fuel leak again.  Trying to figure out where.
Title: Re: Misc Fiero issues
Post by: Fierofool on June 07, 2020, 07:11:58 pm
I've had 2 recent issues with AC.  First, MikeMac found that one of the pressure switches was unplug.  Then recently, it stopped workin again.  Scott discovered the belt had come off and was behind the compressor pulley.  Then a garage discovered the compressor was locked when they were putting the belt back on. 

Low refrigerant won't allow the compressor to come on.  Also, bad pressure switches on the compressor or at the receiver/dryer will have the same effect. 
Title: Re: Misc Fiero issues
Post by: scottb on June 07, 2020, 07:46:27 pm
Has the relay gone bad? Fuse blown? I would check those first before you start trying to find a leak. Easy stuff first
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 07, 2020, 07:48:31 pm
I checked the fuse.  Relay is next.  The belt is on.
Title: Re: Misc Fiero issues
Post by: scottb on June 07, 2020, 07:57:02 pm
If the relay shows good then you probably do have a leak..... I can use my sniffer to find it. We will all be at my shop Saturday
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 07, 2020, 08:14:15 pm
How I wish I could be there, but have 2 wedding anniversaries coming up.

I have 3 big issues: fuel leak, oil leak, and AC not working.  I'm waiting on the engine bay to cool, before checking on the fuel again.

When the AC did work, the dryer would get icy, but it was just cool in the cabin.
Title: Re: Misc Fiero issues
Post by: scottb on June 07, 2020, 08:36:51 pm
2 wedding anniversaries???????? Ummmmmmmm not sure what to say
Title: Re: Misc Fiero issues
Post by: scottb on June 07, 2020, 08:40:12 pm
did the compressor ever fail? Those symptoms sound like a case of black death where the compressor failed and the evaporator is stopped up. I don't think it can be cleaned. Only cure is replacement
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 08, 2020, 07:54:33 am
2 wedding anniversaries???????? Ummmmmmmm not sure what to say

2 imminent wedding anniversaries.  I have another in January.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 08, 2020, 07:55:33 am
did the compressor ever fail? Those symptoms sound like a case of black death where the compressor failed and the evaporator is stopped up. I don't think it can be cleaned. Only cure is replacement

The last compressor did fail.  Since then, just about everything has been replaced.
Title: Re: Misc Fiero issues
Post by: Fierofool on June 08, 2020, 08:02:12 am
Oddly, when things ice over, it's an indication of low refrigerant.  My home AC was doing that last year.  Didn't cool the house worth a darn, but the heat pump was caked in ice.  Pinhole leak in one of the lines. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on June 08, 2020, 08:04:43 am
That makes me feel better.  The idea of replacing the evaporator again...does not fill me with joy.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 03, 2020, 05:08:17 pm
My poor Fiero seems to have a fuel leak again.  Trying to figure out where.

I checked again, high and low for a leak.  Nothing.  It smelled like raw fuel, the other day.  The injdctors are dry, with no evidence of having leaked.  I ran the engine for a while, but neither saw nor smelled any leaks.  So, I went for a short drive.  Nothing.  I made several stops.  Nothing.  Filled up with fuel.  Nothing.

Rrrrrrgh!
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on July 19, 2020, 10:12:43 am
A guy agreed to let me use some space in his shop, and to help with replacing the seal in the timing cover.  No lift, so this will take a while.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 07, 2020, 05:05:25 pm
Used a sniffer.  Still can't find the fuel leak.  Everything appears to be tight.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 07, 2020, 05:06:35 pm
You probably need to check and see if you have freon and there is  pressure in the system

Bingo.  No pressure.  It appears that the compressor itself is leaking.  Joy.  This compressor isn't even 4 years old, yet.
Title: Re: Misc Fiero issues
Post by: Fierofool on August 07, 2020, 06:24:20 pm
Mine lasted almost 2.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 07, 2020, 06:25:35 pm
 >:(

Parts used to be made better.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 08, 2020, 06:33:17 pm
The AC is charged.  It was at 1 pound, and we filled it up to 2 pounds.  Blows cold, but probably only for a month or two.  We cleaned everything and added dye, so we'll know for sure.

For the exhaust gasket at the EGR mount block, the heat-coated mount block had a small imperfection in the mating surface, right where the gasket blew.  We used high-temp RTV.  If that holds for more than a few hundred miles, maybe we have something.

For the oil leak, we pulled the seal on the crankshaft at the timing cover and replaced it.  We changed the oil. Drove home.  Drips under the same spot.  About a 3-inch diameter puddle on the ground.  Joy.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 09, 2020, 03:33:05 pm
Not sure what's up with the temp gauge.  I had a long wait, and the engine temp on the gauge started climbing.  I figured the temp would drop when I started moving.  Then I hit some red lights.  The temp climbed to the red.  So, I pulled into a vacant lot and parked.  I left the engine off, but every few minuted, I'd turn the key to check the temp.  The gauge would move to about halfway, then go up and down, eventually getting into the red.  This went on for 12 or so minutes.  The ECU showed the temp was OK, while the engine had bern running, and the temp probably is OK.  I did open the decklid, to let the hot air out.  The dnhine did cool off, down to only moving the needle up about 1/4th of the way.  After those 12 minutes, I closed the decklid, and drove home.  The temp never got above halfway.

This is an ongoing issue.
Title: Re: Misc Fiero issues
Post by: The Art Doctor on August 09, 2020, 03:43:20 pm
Pack a cheap IR gun to verify temp at radiator, hoses and other locations.   Possibly a faulty gauge or sender but you dont need a blown head gasket if its not.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 09, 2020, 04:16:47 pm
It may just be a missing heat shield at the sensor.

The odd part was the gauge moving up and down while the engine was off.  Could be a bad ground.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 14, 2020, 07:08:16 pm
One of my axle boots is leaking.  I suspect that'll take several hours to fix.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 22, 2020, 06:07:58 pm
The temp gauge plastic is melting.

Looking at the RTV, it blew out of there in a gooey mess.  So much for that.  I think it lasted for 50 miles.

I got 20 more EGR gaskets.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 28, 2020, 07:20:26 pm
EGR gasket installed, but first, the mating surface of the Y-pipe was ground flat.  Hope this holds.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 30, 2020, 04:23:58 pm
I'm about out of ideas.  It sprung another leak.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 31, 2020, 08:21:09 pm
While driving, today, I noticed that my windshield was dirty, so I ran the washers.  No, that's not true.  The wipers moved back and forth a few times, but no fluid came out.  Then the wipers stopped, and would not budge.

Looking at my left foot, I saw a fuse was blown.  When I got home, I replaced the fuse, which blew as soon as I put it in.  Joy.  I checked the washer fluid tank, which was about half full.

Any idea where to start looking?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on August 31, 2020, 09:42:16 pm
Did I mention what the wipers stopped while pointing up?  I felt like an ID...--one of those people who aren't rocket scientists.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 03, 2020, 06:53:35 pm
Well, I used the laser thermometer, and the results were alarming--and confusing.

The temp on the temp sensor was 309F.  The temp on the CTS was 189F.  The temp on the manifold was 547.
Title: Re: Misc Fiero issues
Post by: The Art Doctor on September 03, 2020, 09:03:08 pm
I just temp gunned my wagon tonight trying to diagnosis a possible cooling problem. I got 190 upper hose. 235 top of radiator 160 face of radiator with engine fan running, intake manifold 255 water pump 245 headers 575 all on a 160 thermostat. Mine seems to be ok. You might be as well.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 03, 2020, 09:46:20 pm
The CTS is on the coolant exit, and the temp sensor appears to be right by the head.

What I need to know is the temp other people see on their Fiero.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 04, 2020, 07:08:57 pm
Anyone?
Title: Re: Misc Fiero issues
Post by: scottb on September 05, 2020, 07:27:24 pm
mine usually runs 180-190, only time mine gets hot is when pulling a long grade or stuck in traffic
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 05, 2020, 07:56:17 pm
I'm suspecting an air pocket.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 05, 2020, 09:27:34 pm
It looks as if the oil leak is coming from the O-ring for the oil pump.  Rrrgh!
Title: Re: Misc Fiero issues
Post by: scottb on September 05, 2020, 09:49:26 pm
Distributorless 3.4?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 05, 2020, 10:01:21 pm
Yes.
Title: Re: Misc Fiero issues
Post by: scottb on September 06, 2020, 05:26:35 am
Ok..... I couldn't figure out how the oil pump inside the oil pan could be causing a leak on the outside of the engine...... most parts store stock the oring
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 06, 2020, 09:11:55 am
True, but this will be the third time this seal has been replaced in 3 years.
Title: Re: Misc Fiero issues
Post by: Fierofool on September 06, 2020, 12:18:25 pm
Flex-Seal    ;D
Title: Re: Misc Fiero issues
Post by: Raydar on September 06, 2020, 02:28:03 pm
Flex-Seal    ;D

I would think there would be, (or if there isn't, there really should be) a gasket under the top of the piece, too, where it is fastened to the block.
Title: Re: Misc Fiero issues
Post by: scottb on September 06, 2020, 06:49:12 pm
Flex-Seal    ;D

I would there should be, (or if there isn't, there really should be) a gasket under the top of the piece, too, where it is fastened to the block.

Steve I think you missed a word......
Title: Re: Misc Fiero issues
Post by: Raydar on September 06, 2020, 08:13:42 pm

Steve I think you missed a word......

I guess my mind works faster than I can type. Or I type faster than my mind works. Or something. Whatever. Fixed.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 06, 2020, 09:07:19 pm
Whatever. Fixed.

Well, thanks.  I'll check that confounded oil leak tomorrow.  ;D
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 08, 2020, 06:23:15 pm
Replaced the gasket and O-ring.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 08, 2020, 07:00:27 pm
The temp issue is being uncooperative.  There don't seem to be air pockets.

I almost suspect the water pump.
Title: Re: Misc Fiero issues
Post by: Fierofool on September 08, 2020, 09:42:35 pm
Replaced the gasket and O-ring.

I never knew there was a gasket for the distributor, or the DIS oil pump drive.  Never heard anyone ever mention one.  Just the O-ring. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 08, 2020, 09:44:31 pm
Me, either.  Considering how many "Fiero mechanics" had it apart, maybe we weren't the only ones.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 08, 2020, 09:46:57 pm
Flex-Seal    ;D

I would think there would be, (or if there isn't, there really should be) a gasket under the top of the piece, too, where it is fastened to the block.

Raydar gave me the idea.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 08, 2020, 09:48:07 pm
It looks as if a new AC compressor is in order, next year.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 09, 2020, 04:53:35 pm
Well, the good news is that the engine isn't overheating.  The bad news is that the gauge shows that it is.  I can't blame the gauge, due to how hot the sensor itself gets.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 11, 2020, 06:58:17 pm
New issue.  The transmission is leaking from the output shaft and the pan gasket.

I'm having trouble finding a gasket I'm sure is correct.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 14, 2020, 07:19:23 pm
Anyone know how to find the correct pan gasket for  a 4T60 transmission?
Title: Re: Misc Fiero issues
Post by: TopNotch on September 14, 2020, 11:01:55 pm
Ask for the gasket for a 95 Buick Park Avenue. That should be it.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 14, 2020, 11:10:05 pm
Thx.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 15, 2020, 11:35:14 pm
Well, the gasket is a different shape.  Apparently, 1992 was the last year for this transmission.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 21, 2020, 09:13:46 pm
The water pump is out.  There isn't a lot of space for removing the gasket.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on September 24, 2020, 06:25:13 pm
Well, the new water pump is in.  No improvement.  The temp on the heads is consistent and good.  Both the temp sender and the CTS were replaced, and the temp sensor pigtail was replaced.  The gauge (which is calibrated) was reading in the red, but the coolant was only warm at the CTS.


The only thing I can figure is that there is a short somewhere.  Any idea where?  The issue seems to be worse while the car is stopped--even in park, so not the brake pedal.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 06, 2020, 05:50:00 pm
Since my axles are toast, what happens if I cut them off at the transmission, remove the end from the knuckle, and flat-tow my Fiero 50-something miles on the highway?  My theory is that the wheels won't fall off, but will turn, and that the transmission won't overheat, and won't leak.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 06, 2020, 07:44:27 pm
The knuckle or hub end is the critical part.  The end of the axle holds the hub together.  If you have to rent a dolly get one for the rear wheels, too.  Tell them you're towing a Grand Am or other vehicle.  Most won't rent a dolly to tow a Fiero.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 06, 2020, 07:55:20 pm
Will the wheel fall off, without the axle?
Title: Re: Misc Fiero issues
Post by: Fierofool on November 06, 2020, 07:58:16 pm
Very possible.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 06, 2020, 08:02:52 pm
The knuckle is attached to the shock and the tri-links.  The tri-links position the knuckle front-to-rear, side-to-side, and vertically.

Hmmm.  The rear hub fits into that, but would seem to only be held in by the axle nut.

Oh, well.  I can drive it.  As long as I don't get on it hard, the axles probably won't come apart.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 06, 2020, 08:08:54 pm
We discussed an acceptable method of towing an automatic was to start the engine and put the selector in Drive.  Strap the steering wheel to the 2 armrests.

The nut is torqued at 200 lb.  That holds the hub together.  If you leave the stub end of the CV joint in place and remove the axle from the outboard CV it would keep the hub together.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 06, 2020, 08:12:21 pm
So, just cut the axle at the CV joints, basically?

Only 200 lb?!!!  Oops.  I torqued them a bit higher.  Well, they stayed tight.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 06, 2020, 08:14:36 pm
Oh.  If the selector is in Drive, it wojld seem that it would be working the against the braking of the tow vehicle.  My Fiero likes to wander up to 40 MPH, unless I tap the brakes, or start up an incline.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 06, 2020, 09:04:02 pm
I think that if you cut the axle at the CV, the joint itself will flop around and possible cause some damage.  It would need to be disassembled so that any part of the flexible portion is removed.  To do such would require disconnecting the rear suspension from the cradle and swinging it out as if you were going to replace the axle then bolt it back to the cradle.  This is the only way you could get the axle out of the transmission, and when you do, fluid is going to spill out the seals. 

In this exploded view, you would leave the HOUSING intact and remove everything else.  The nut on the end of the threaded stub compresses the hub against the flat surface of the housing, keeping the proper load on the hub bearings. 
https://www.aa1car.com/library/cvjoint1.htm
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 06, 2020, 09:17:17 pm
I think I could cut it in place, leaving just the ends.

If I could disassemble it here, I could replace the axles here, so no need to move it somewhere else.  I drove it about 300 miles, as is.  Of course, it probably got worse as I drove it.  Another 50 miles should be OK.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 06, 2020, 10:15:51 pm
If you can do it on a surface road with a lower speed limit would be best.  Of course, with a dolly you could tow it with the rear wheels up.  Just leave the ignition off so the steering is locked.  Take it slow in case you have any play in the steering.  Don't want it to start to whip on you.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 06, 2020, 10:20:17 pm
I meant I think I'll just drive it.  It drove about 300 miles like this, so another 50 miles, if gently driven, may be OK.

We'll find out tomorrow.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 07, 2020, 03:13:32 pm
It drove the 56 miles, no problem.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 07, 2020, 04:36:59 pm
When you replace the axle, consult my hub replacement thread for torque specs. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 07, 2020, 04:39:21 pm
Well, when it comes to how hard to do things, you can add that any hard is too hard to hit your head on corners.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 10, 2020, 07:00:54 pm
The oil pump drive has leaked a bit, so the seal was replaced, again.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 16, 2020, 02:44:49 pm
Well, that noise Scott heard was not the injectors; it was the lifters, or rather, lifter.  On cylinder #5, the oil tip on the pushrod, and a bad rocker.  So, replacing those.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 17, 2020, 07:08:40 pm
All back together.  The power is back, and it isn't running as rich.  It is more peppy off the line, has a lower idle, and does not try to die.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 17, 2020, 07:31:13 pm
The rocker seems to have had a manufacturing defect.  When replacing the rod, we tightened it by 1/4 turn.

No more clickety-clack.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 18, 2020, 06:52:38 pm
The lifters were fine.  The rocker had a manufacturing defect.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 22, 2020, 08:10:20 am


I had thought this was caused by being too tight, but now I'm being told that it is caused by being too loose.  Which is it?
Title: Re: Misc Fiero issues
Post by: TopNotch on November 22, 2020, 09:06:36 am
I would think that either too tight or too loose could cause damage. In the too loose case, parts will bang together (noisy valve train sounds).
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 28, 2020, 10:01:04 am
While messing around in my engine bay, I saw that the year-old plug wires have bad spots in the insulation.  Not cuts, and not cracks, but something that penetrates the outer layer.  That can't be good.

These are custom wires.  Joy.
Title: Re: Misc Fiero issues
Post by: The Art Doctor on November 28, 2020, 02:33:47 pm
I have an idle question. I had to pull the distributor today. Not sure if this is related. After putting it back in and timing the motor I am again having a high idle around 1500. It is at least stable. However, if I ground out the diagnostic port idle goes back to you around 1050. This is where it was before I took out the distributor. Why does grounding out the diagnostic port fix the high idle what is this a symptom of?
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 28, 2020, 02:38:55 pm
Well, it could be a vacuum leak (EGR tube), but I suspect a sensor.  Either the O2 sensor, or the CTS.  Another possibility is the MAP sensor.  You can unplug the MAP sensor, to test, but that will throw a code you'll have to reset.

When you put the ECU in diagnostic mode, it ignores the sensor input, and runs on pre-determined values.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 28, 2020, 04:29:29 pm
I just pulled my distributor to replace the O-ring seal.  I very carefully indexed my distributor and marked it for timing location.  After the reinstall, the engine idled at about 1500.  It also had a noticeable stumble upon acceleration, but then it would go.  Idle rpm would waver at operating temperature. 

Due to the stumble, I decided to advance my timing just a hair.  I know that advancing timing will often increase rpm at idle, but in my case, it dropped it back to around 1050 where it normally idles and the rpm wavering also went away.  Well, almost.  Maybe a 50 rpm variance. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 28, 2020, 04:31:49 pm
Could the high idle be caused by a valve not being fully closed?
Title: Re: Misc Fiero issues
Post by: Fierofool on November 28, 2020, 04:37:34 pm
What valve would that be? 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 28, 2020, 04:41:45 pm
Well, just wondering how the timing would change idle.

The strokes, are intake, compression, power, and exhaust.  Now that you mention it, the valves should be closed, by then.
Title: Re: Misc Fiero issues
Post by: The Art Doctor on November 28, 2020, 05:17:32 pm
I did the o ring thing too.  No more leaks.  I changed the ICM too.  Forgot to add that.  Could that have been it?  Seems to have fixed the stumble but I wont know till I put a few more miles on it.  I also did a incoming air reset trying to fix it but did not help.  I disconnected the battery during the removal but obviously had to reconnected to get it to run again. Just tried timing it again and now its terrible.   Should I set timing with diagnostic grounded or open?
Title: Re: Misc Fiero issues
Post by: Fierofool on November 28, 2020, 05:51:17 pm
Set your timing with the ALDL jumpered.  Install and remove the jumper with the ignition OFF.  The engine should be at operating temp for best initial result. 
Title: Re: Misc Fiero issues
Post by: The Art Doctor on November 28, 2020, 06:21:05 pm
I think I got it closer just before dark.  Not too familiar with the ALDL I might have not followed proper procedure and messed with it with key on.  Hope I didnt do permanent damage to anything.  I tried to set timing by rpm, terrible mistake.  Almost didnt make to corner and back and pipes were glowing.  Re set to my base mark and with jumper it is back to 1050 and pulls strong.  By the timing light and the tab it is at 8 degrees.  Should I go for 10 or leave it alone?   When I pull the jumper it still goes back to a high idle so something is up.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 28, 2020, 06:42:37 pm
Installing and removing the jumper can reportedly damage the ECM if the ignition is ON.  Two lower terminals on the passenger side of the ALDL.  Now that you have it close, you don't need to insert the jumper.  You can loosen and turn the distributor a little either way with or without the engine running.  But again, the engine should be at operating temperature for best result. 

It's possible that the outer ring on the damper has slipped, so you may not be getting a true reading.  It may take a little playing with the distributor setting to achieve an optimal position. 
Title: Re: Misc Fiero issues
Post by: The Art Doctor on November 28, 2020, 07:24:40 pm
Live and learn.  Hopefully it's ok, if not I'll be in the market.  I think all my fiddling might have set the computer a bit haywire. I pulled the battery cable and will let it set tonight and start over tomorrow. 

On the 8 degrees timing I think I may have a mark off because I got the same reading for both 1 and 4 the same.  Its probably very close right now.
Title: Re: Misc Fiero issues
Post by: Fierofool on November 28, 2020, 08:16:04 pm
Every time you kill power to the ECM, it has to relearn the sensors.  That means you must drive the car at road speeds for some distance at operating temperature.  The distributor isn't a sensor and there is no relearning associated directly with it.  It's a mechanical adjustment.

It can be a bit of a chore and even dangerous to disconnect battery terminals.  The negative is cramped in.  The tool used on the positive post can make contact with other vehicle parts.  If you want to clear trouble codes set in the ECM, disconnect the small tubular device that is just outside the battery case and is connected to the C500 wiring terminal near the negative terminal.  That's the ECM constant power.  It's a red wire, sometimes faded to orange or yellow. 
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on November 28, 2020, 09:54:32 pm
Hmmm.  I think that one needs a new topic.
Title: Re: My Misc Fiero issues
Post by: The Art Doctor on November 29, 2020, 09:47:45 am
Ok, probably own worst enemy.   Plugged back in battery.  Took for long drive.  Re set timing with ALDL jumped properly.   I tried driving with it set at both 8 and 12 degrees and honestly didnt notice any seat of pants difference.  The idle rpm was definitely different at each setting.  Using the coil wire I got the timing finally dead on 10, double checked using 1 and 4 plug wires.  Runs like it did but without ALDL jumped idle is exactly 500 rpm over.   With jumper it is a bit higher than before around 1150.  I could probably loose the 100rpm if I readjust timing again a smidge but then it would not be even at 4 and 1.  It did the high idle thing when the plug blew out, took about 700 miles for it to come back down.  Slow learning computer I guess.  I'm going to stop messing with it and just drive.  I think one of my big errors was not hooking up timing light before removing the distributor and seeing what it looked like at the mark so I'd have a frame of reference.
Title: Re: My Misc Fiero issues
Post by: Raydar on November 29, 2020, 10:22:10 am
You actually can set the timing by ear, like in "the olden days". Advance it until it pings under load, then back it off until it doesn't.
It's how I set my 4.9. (I believe the timing ring has slipped. After setting it by ear, I hooked the timing light back up, just for grins. It "shows" 10-12 degrees more advance than the book calls for. When set to spec, using the light, it doesn't have enough power to pull a fat man from a donut shop.) 
Title: Re: Misc Fiero issues
Post by: Raydar on November 29, 2020, 10:23:22 am
Hmmm.  I think that one needs a new topic.

Possibly right...

Admins?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on November 29, 2020, 01:31:06 pm
Hmmm.  I think that one needs a new topic.

Just a thought.
Title: Re: My Misc Fiero issues
Post by: The Art Doctor on November 29, 2020, 01:44:46 pm
Ok I promise last post from me on this subject.   I went and put the original ICM back in to eliminate that variable, no change.  If the stumble returns I'll switch it back.  I tried to adjust timing for RPM and she fell flat.  I went back to the 10 degree setting by the light with the jumper in place, which position matches marks I made before pulling it, and it again pulls strong.  Idle is way too high at 1750 now but it runs as good as before. Will remove intake snorkel and check for vacuum leaks but do not expect to find any.  Going to have wait for computer to recalibrate.  At least its stable and not swinging.  And it's cold out so less chance of overheating in traffic. When the plug blew out it was this high at first.  It took a trip of over 1500 miles to drop half way then another 700 to drop last 250rpm.  Could take months at the rate I have been driving.  Sucks, but at least I have the oil spill finally under controll.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 19, 2020, 04:05:17 pm
So, the driveline vibration is back under moderate acceleration.  No nearly as bad, but there.  I can feel it in the steering wheel, and a bit in the car.  Just a bit, side to side.
Title: Re: My Misc Fiero issues
Post by: The Art Doctor on December 19, 2020, 10:27:21 pm
Rebalance the tires?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 19, 2020, 10:29:30 pm
That occurred to me--especially as I was watching one rear wheel of a Jeep bouncing away, next to me.
Title: Re: My Misc Fiero issues
Post by: The Art Doctor on December 19, 2020, 10:38:22 pm
When they are worn about half way a rebalance can bring back smoothness lost.  Also possible you threw a weight. 
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 19, 2020, 10:40:37 pm
More likely a thrown weight.  The tires only have a few thousand miles on them.  They have lots of tread.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 21, 2020, 05:57:32 pm
The camber is way out on both sides.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 21, 2020, 08:04:58 pm
Looks as if the tank will be coming out.  No Fiero for Christmas.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 22, 2020, 06:53:59 pm
The tank is out.  As I suspected, one of the baffles is cracked.  Joy.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 22, 2020, 06:54:57 pm
Oh.  The wheel on the right side is sticking out about half an inch too far.  I think it is hung up on the wheel seal.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on December 22, 2020, 09:37:53 pm
Talk about good luck
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 22, 2020, 10:12:28 pm
Have any?
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on December 22, 2020, 10:13:17 pm
None. Zip. Zero. Nada.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on December 22, 2020, 10:15:40 pm
Unfortunately, I have seen many Fieros that are driven with these types of issues.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 08:37:01 am
I still think my Fiero is down on power.  Nothing statistical, but I can't break the rear wheels loose.  It goes, and is peppy, but it isn't as peppy as it was.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 12:02:31 pm
Yeah I can’t break my wheels loose too. Doesn’t have anything to do with it being a 4cyl. 😂
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 12:04:22 pm
Mine did.  In first, no problem, and just a bit in second.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 12:17:36 pm
Hmm.... well that confirms I didn’t fell like I’ve been getting all 98 hp. I’ve driven heavier Honda’s with less hp and been able to break loose.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 12:21:50 pm
Mine has probably 160 HP at the wheels.  I mean, had.  It feels like 140 HP at the wheels.

98HP at the crank will not do it.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 12:22:16 pm
Oh.  I suspect torque breaks the wheels loose.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 12:22:47 pm
Oh I thought you meant you had a 4cyl that did. 😂
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 12:24:03 pm
Oh.  I suspect torque breaks the wheels loose.

Generally yes. Torque and hp as you know don’t always correlate 
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 12:25:27 pm
Well, I used to have torque.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 12:29:46 pm
Well, I used to have torque.

Now this is an automatic so it can be slipping 1st gear clutches or slipping torque converter or misadjusted cable or governor. So all that power can be getting lost in the transmission.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 12:31:22 pm
No, it seems that the engine just doesn't want to spin up.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 12:33:15 pm
Lack of air or fuel?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 12:53:30 pm
I think it's only running on 5 cylinders.  Spark.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 01:00:11 pm
5 out of 6 is still 83%. You still pass the exam. 😂

When was the last full tune up? I assume you’ve checked the wires and cap?

Also find yourself one of these

https://www.amazon.com/dp/B075DC58NS/ref=cm_sw_r_cp_awdb_imm_t1_Tk27Fb7D5K581

Best tune up pocket tool

I also have a tool that can check the insulation on the wires. You can get it cheap on Amazon
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 01:04:11 pm
On the tour, power felt way down.  I found a bad pushrod.  I suspect that cylinder is fouled.  The plug wires have little cuts in the insulation, so are being replaced.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 01:09:05 pm
To be honest I specialized in overhead cam engines. I have a lot to learn about push rod engines.
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 01, 2021, 03:00:20 pm
Mostly, they just have 2 extra parts per cylinder.  Lifter and pushrod.  Then there's that funky thing with all the bumpy things on top of the cylinder head that's missing.   ;D
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 01, 2021, 03:14:03 pm
Ralph, thanks for the link to that spark tester.  I looked at it and it says it's no longer available.  I scrolled down on the page and found one just like it made by Lisle Tools, having a 4.5 star rating.  Stocked in the US, made in China, but I ordered it for $8+.  I think it will come in handy for finding the light skip in my truck. 

https://www.amazon.com/Lisle-19380-Spark-Tester/dp/B0002STS3U/ref=pd_sbs_263_1/134-6974985-8377458?_encoding=UTF8&pd_rd_i=B0002STS3U&pd_rd_r=af7ce9fe-bc4d-49bf-9ae5-d43b14ba9367&pd_rd_w=VlgDx&pd_rd_wg=uYZm3&pf_rd_p=ed1e2146-ecfe-435e-b3b5-d79fa072fd58&pf_rd_r=24JJ3ZHF75X45NAYD0MP&psc=1&refRID=24JJ3ZHF75X45NAYD0MP

My sister's van developed a bad miss with a misfire trouble code.  The garage charged her $515 to replace the #5 coil and plugs.  Dodge Journey. 
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 05:03:39 pm
That’s the one I have.  Probably a few more floating around the tool box too.
Title: Re: My Misc Fiero issues
Post by: The Art Doctor on January 01, 2021, 10:21:27 pm
I just use a timing light.  Clip it to each wire in turn to find the one that does not make it flash.
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 10:32:23 pm
When I was a full time auto tech it was great in the pocket. I would check every car no matter what I was doing. Plus I can run it along the wire looking for a break. Sold a lot of tuneups that way.
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 01, 2021, 10:49:49 pm
I suppose you can identify a weak spark by the intensity of the flash?
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 11:00:50 pm
Yes. The intensity tells you a lot.
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 01, 2021, 11:15:15 pm
Good. That's what I was hoping for.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 11:21:20 pm
Yes. The intensity tells you a lot.

Color, too?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 01, 2021, 11:22:34 pm
Good. That's what I was hoping for.

Now, don't go grabbing the wire to test the intensity.  Don't put it on your tongue.   :D
Title: Re: My Misc Fiero issues
Post by: Wreck It Ralph on January 01, 2021, 11:39:41 pm
Good. That's what I was hoping for.

Now, don't go grabbing the wire to test the intensity.  Don't put it on your tongue.   :D

Actually I’d wet my hand and run it on a wire to find weak insulation. No shock that it worked well. 😂
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 02, 2021, 08:11:26 am
Good. That's what I was hoping for.

Now, don't go grabbing the wire to test the intensity.  Don't put it on your tongue.   :D

So as not to hijack this thread, go to General Discussions for some shocking events.
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 05, 2021, 02:52:25 pm
I got my handy-dandy Lisle Spark Tester delivered at my doorstep on Sunday.  Today, I decided to see what it might show the cause of the miss on my truck.  Well, it showed nothing.  So, I went to the Fiero.  Nothing.  I started looking closely at the bulb and it didn't have a filament.  Amazon said throw it away and they'll send a replacement. 
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 05, 2021, 05:48:51 pm
Made in China?
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 05, 2021, 06:16:29 pm
Yes.
Title: Re: Misc Fiero issues
Post by: GTRS Fiero on January 17, 2021, 08:58:22 am
Michael, I have 3 GM OEM gaskets.  They are graphite coated and I believe they have a wire mesh inside them.  Email, text or PM me your address again and one will be in the mail in the morning.

If you still have these, would you send me a pic, please?
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 17, 2021, 09:13:25 am
I got my handy-dandy Lisle Spark Tester delivered at my doorstep on Sunday.  Today, I decided to see what it might show the cause of the miss on my truck.  Well, it showed nothing.  So, I went to the Fiero.  Nothing.  I started looking closely at the bulb and it didn't have a filament.  Amazon said throw it away and they'll send a replacement.

I received the free replacement spark tester.  I haven't tried it but there is no filament in the bulb on this one, either.  Does anyone have a spark tester of this type, without a filament in the bulb, and it works?  Maybe all my vehicles just have spark too weak to show? 
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 17, 2021, 09:21:24 am
I just received my Lisle Spark Tester.  How to tell, about the bulb?  If it works?
Title: Re: My Misc Fiero issues
Post by: TopNotch on January 17, 2021, 09:57:04 am
I received the free replacement spark tester.  I haven't tried it but there is no filament in the bulb on this one, either.  Does anyone have a spark tester of this type, without a filament in the bulb, and it works?  Maybe all my vehicles just have spark too weak to show?
Maybe there's supposed to be a spark in the bulb, across the gap where the filament would be. That would make sense to me.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on January 17, 2021, 09:59:43 am
Makes sense to me.  I know my Fiero has spark.  I was personally the spark tester.  Yowser!
Title: Re: My Misc Fiero issues
Post by: Fierofool on January 17, 2021, 10:23:54 am
I tried the first one and there was no indication of a spark inside the bulb.  Images of similar tools by other manufacturers show a filament inside.  Maybe Lisle uses a luminous gas.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on February 12, 2021, 05:36:54 pm
The cruise stalk had been installed incorrectly, with the cable wrapped around the column.  That stalk was cut out, and a new stalk installed correctly.  That may or may not have been the cause of the cruise issues.  When the roads clear, I'll have to do a road test.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on February 12, 2021, 05:37:18 pm
The temp gauge wire seems to have erratic resistance, so that needs to be addressed.  My Fiero was moved outside, where the temp is 12 degrees.  After a few hours, we turned the key, without starting the engine.  The temp was OK, then slowly rose, until indicating overheat.  We ran a temporary wire to test.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on February 12, 2021, 06:50:19 pm
It looks as if the problem is the temp sensor.  I have gone through 9 of these.  Thanks, china.

New sensor installed.  Temp gauge reads correctly.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on February 21, 2021, 11:06:31 am
When traffic was minimal, I had a small parade: street sweeper/vacuum, water spray truck, and dryer.  They cleared off 3 lanes (all) in both directions, for several miles.  Hopefully, that got most of the salt.  It took them several hours.

I took the Fiero for a drive.  Still no cruise control.  The engine dies when stopping.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on February 21, 2021, 05:30:03 pm
Looking my Fiero over, I found this:


Joy.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on February 22, 2021, 07:03:24 pm
And today, the tempermental cruise control worked.

Found 2 more vacuum leaks, both at the throttle body.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on February 26, 2021, 08:19:05 am
Found a puddle of oil under the left side of the engine, again.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 01, 2021, 05:58:41 pm
My hazard lights flash once, then go dead.  Bad relay?
Title: Re: My Misc Fiero issues
Post by: Fierofool on March 01, 2021, 06:52:41 pm
Sounds like it.  I think that's the one up underneath the driver's side.  The hard to get to one. 
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 01, 2021, 07:00:34 pm
Consulting the October 2018 newsletter, it's in the courtesy center.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 02, 2021, 06:47:02 pm
The shimmy seems to be back.  There must be something else that is moving, front and rear.  The tow was out in both the right front and the left rear.  The tie rods are tight in the front, as are the tri-links in the rear.  I don't recall hitting any monster potholes.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 04, 2021, 05:04:52 pm
The fluid leak seems to still be the transmission pan.  Going to try some RTV.  Otherwise, must replace the pan.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 05, 2021, 10:03:59 pm
Re-alignment is done.  Rrgh!

The wires to the EGR had melted, so had to be replaced.  One of the wires was a ground wire--the same ground wire that goes to the TPS, so that likely explains the poor fuel economy, this last run.  That or my right foot.  Likely one of those things.  Only 119 miles for 6.2 gallons.  Anyway, the AFR was all over the place.  Between that and the vacuum leak, well, it was not a happy camper.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 08, 2021, 05:50:57 pm
I drove my Fiero to work, and parked in the lot.  Someone backed into my Fiero, and hit the right side tail light.  Probably the bumper, too, but the tail light is now damaged.   Rrgh.  Then, the guy was going to "fix" the damage.  Right.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 09, 2021, 06:23:26 pm
The RTV seems to be holding, and hey, thanks for the empathy!
Title: Re: My Misc Fiero issues
Post by: Fierofool on March 09, 2021, 07:38:12 pm
Was it an original or reproduction taillight?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 09, 2021, 07:42:40 pm
Original.  The set you saw.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 10, 2021, 08:54:36 am
I just can't seem to get rid of these darn leaks!  The trans pan should be sealed with RTV.  This morning, there were 2 drip spots.
Title: Re: My Misc Fiero issues
Post by: Fierofool on March 10, 2021, 09:12:38 am
FlexSeal
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 10, 2021, 10:04:23 am
I'll probably have to try that.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 10, 2021, 04:18:12 pm
My hazard lights flash once, then go dead.  Bad relay?

Replaced the relay.  No change.  If I unplug the relay, nothing.  If I just push the hazard switch in part way, the lights come on and stay on.  Leaning toward wiring or switch,
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 19, 2021, 06:17:13 pm
The side pan on my transmission is leaking.  I know the THM125C side cover can be replaced in the Fiero.  Anyone know about the 4T60?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 20, 2021, 05:36:55 pm
The side pan on the 4T60 is against the engine cradle.  Not touching, but too close to remove in place.  Rather than drop the transmission, we're going to try raising the engine/transmission a few inches up from the cradle.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 26, 2021, 05:51:49 pm
Well, the left axle seal was bad, so everything is apart, waiting on that seal.  Apparently, the seal was not the correct one.  The new seal is supposed to be in next week.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 29, 2021, 05:47:29 pm
My Fiero now has the opposite issue from the problem others have: mine is starving for fuel.

On the positive side, no vacuum leaks.
Title: Re: My Misc Fiero issues
Post by: Fierofool on March 29, 2021, 06:33:53 pm
Did you do anything other than transmission work?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 29, 2021, 06:49:20 pm
Oh, yes.  Removed the upper plenum, went over all vacuum lines, replacing several elbows.  Replaced EGR tube gasket at EGR block.  Swapped out digital cruise module.  Replaced battery.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on March 30, 2021, 05:16:37 pm
Cruise still no worky.  Going to have to check wiring.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 01, 2021, 07:58:59 pm
I replaced the damaged '88 right tail light with a right tail light from an '86.  This tail light has a small blemish, and all my polishing did not make the lights match.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 02, 2021, 07:22:11 pm
I have an issue with my oil light.  It doesn't come on.  The bulb is good (works on the volts side), and the socket is good.  No voltage to the pins in the gauge.  No oil light.  Ideas?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 10, 2021, 06:11:40 pm
My coolant/radiator fan suddenly runs all the time.  My first thought was that the sensor was unplugged, but it isn't.  Any other ideas?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 15, 2021, 06:32:57 pm
It ended up being a switch on the compressor.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 24, 2021, 09:30:08 am
I have an issue with my oil light.  It doesn't come on.  The bulb is good (works on the volts side), and the socket is good.  No voltage to the pins in the gauge.  No oil light.  Ideas?

This is a bad aux board.   >:(
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 24, 2021, 09:32:25 am
Return of water sound.

I have that sound like water through a faucet.  It's intermittent.  Turns on and off.  Sometimes, it happend when I hit a bump in the road; sometimes while on smooth surfaces.  A bit worried this may be the booster, since the noise seems to come from the front.  Dunno what else it could be?
Title: Re: My Misc Fiero issues
Post by: Fierofool on April 24, 2021, 06:06:39 pm
The only other thing is the heater core.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 24, 2021, 06:36:05 pm
Well, not losing coolant.  No puddle on the floor or the driveway.  No more cooling issues.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 26, 2021, 09:34:03 pm
If you wanted to check the VSS signal, how would you do it?  What instrument would be used?
Title: Re: My Misc Fiero issues
Post by: TopNotch on April 26, 2021, 09:40:42 pm
Check it for accuracy, or check it for any signal at all?
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 26, 2021, 09:41:40 pm
Signal.
Title: Re: My Misc Fiero issues
Post by: Fierofool on April 26, 2021, 09:45:45 pm
I have removed the VSS, clamped the drive into a drill and spun it to see if it generates a speed on the speedometer.  You can also probe it with a meter while spinning it with a drill to test the VSS alone. 
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 26, 2021, 09:55:08 pm
No volts on the meter while driving.
Title: Re: My Misc Fiero issues
Post by: TopNotch on April 26, 2021, 10:52:22 pm
Jack up one rear wheel, lit the car idle in gear, connect an oscilloscope to the VSS. You should get a pulse wave form.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 26, 2021, 11:43:55 pm
Thanks.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 27, 2021, 06:58:14 pm
The only other thing is the heater core.

You may be right.  Not sure how it would make that noise, though.
Title: Re: My Misc Fiero issues
Post by: Fierofool on April 27, 2021, 07:07:07 pm
If you jack up the vehicle and let the wheel spin, be sure to jack it up by the suspension, not the frame.  You don't want to damage an axle or seal. 
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 27, 2021, 07:09:32 pm
Right.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on April 29, 2021, 06:39:07 pm
My AC is working great!
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on May 02, 2021, 12:51:36 pm
My Fiero gets a whopping 146 miles on a tank, then only takes a bit over 5 gallons of fuel.  I was running about 280 miles on a tank, then filling up, without running out, but it now loses fuel pressure at 146 miles.  This particular issue surfaced after fixing an issue with the sender arm hitting the baffle.

Any ideas?
Title: Re: My Misc Fiero issues
Post by: Fierofool on May 02, 2021, 01:17:31 pm
If it loses pressure as the fuel level drops, I would suspect that you have a leak at the hose that connects the sender with the pump.  Loose clamp, maybe. 
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on May 02, 2021, 01:21:01 pm
Ok.  Well, when I get a replacement fuel tank, I guess I'll find out.  Until then, not going far betwen fill-ups.
Title: Re: My Misc Fiero issues
Post by: GTRS Fiero on May 13, 2021, 07:06:04 pm
On my way home from work, today, my Fiero lost power.  At first, the engine was still running, but I could not maintain my speed.  I shifted to neutral, and could still rev the engine, but it was not running wrll.  As I cut across 3 lanes of traffic, heading for the shoulder, the engine died.  I cranked the engine, pulled back onto the highway, and drove home.  At the time of the incident, I had about 20 miles on the tank, and I drove about 11 miles home.  Any ideas, or is this still the loose tube on the pickup idea?