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Author Topic: My Misc Fiero issues  (Read 125320 times)

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GTRS Fiero

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Re: Misc Fiero issues
« Reply #195 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.
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #196 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.
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #197 on: July 17, 2018, 05:43:54 pm »
The high- and low-pressure lines on the AC compressor can be accidentally swapped.  Who knew?
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Fierofool

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Re: Misc Fiero issues
« Reply #198 on: July 17, 2018, 10:49:47 pm »
How?  They are on a fixed mounting flange and can only be put on one way.
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #199 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.
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #200 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.
« Last Edit: July 20, 2018, 12:42:48 am by GTRS Fiero »
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #201 on: July 21, 2018, 07:30:30 am »
Quote from: 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.

The control lines.
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TopNotch

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Re: Misc Fiero issues
« Reply #202 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.
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #203 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.
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Fierofool

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Re: Misc Fiero issues
« Reply #204 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. 
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #205 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.
« Last Edit: July 28, 2018, 10:30:42 am by GTRS Fiero »
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Fierofool

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Re: Misc Fiero issues
« Reply #206 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. 
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There are three kinds of men:

1.    The ones that learn by reading.
2.    The few who learn by observation.
3.    The rest of them have to pee on the electric fence and find out for themselves.    Will Rogers

GTRS Fiero

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Re: Misc Fiero issues
« Reply #207 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.
« Last Edit: July 28, 2018, 10:27:47 am by GTRS Fiero »
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #208 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.
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GTRS Fiero

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Re: Misc Fiero issues
« Reply #209 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.
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