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Author Topic: EGR open while parked?  (Read 14253 times)

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GTRS Fiero

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EGR open while parked?
« on: November 17, 2019, 09:04:19 am »
Is it possible to get the EGR to open for testing, while parked?

I don't want to drive on the salt.
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Fierofool

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Re: EGR open while parked?
« Reply #1 on: November 17, 2019, 09:32:34 am »
If you know what voltage is applied to it, you might be able to apply voltage with a 9V or smaller series of batteries to get it to open with it on a work bench. 

There are 3 solenoids on the digital EGR.  There are 4 wires, with two of them being bonded together.  That may be to prevent the two brown wires from being used improperly.  I don't know if the solenoid receives its ground through the engine or through the circuit. 
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GTRS Fiero

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Re: EGR open while parked?
« Reply #2 on: November 17, 2019, 09:35:01 am »
Well, I need to see if the EGR tube gets hot.
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Raydar

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Re: EGR open while parked?
« Reply #3 on: November 17, 2019, 10:00:57 am »
Get a hand vacuum pump. Available at parts stores, in the tool section. Connect to the port on the EGR valve. One or two pumps of the handle will open it. Unless there's a leak, it should stay open.
Or you can just run a vacuum line from the EGR valve to one of the "manifold vacuum" ports. (The throttle body fitting for the EGR is probably the only vacuum fitting that is NOT full manifold vacuum. The EGR uses "ported" vacuum, so that it will only open when the throttle is open.)
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GTRS Fiero

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Re: EGR open while parked?
« Reply #4 on: November 17, 2019, 10:03:10 am »
Sorry.  Mine is a digital EGR.  No vacuum port.  I should have stated that, in the first post.
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TopNotch

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Re: EGR open while parked?
« Reply #5 on: November 17, 2019, 11:19:27 am »
If the underside of your EGR valve has holes in it, perhaps you can just push up on the valve through one of the holes with an appropriately shaped object.
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GTRS Fiero

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Re: EGR open while parked?
« Reply #6 on: November 17, 2019, 12:23:00 pm »
No holes.
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Raydar

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Re: EGR open while parked?
« Reply #7 on: November 17, 2019, 06:42:01 pm »
Quote from: GTRS Fiero on November 17, 2019, 10:03:10 am
Sorry.  Mine is a digital EGR.  No vacuum port.  I should have stated that, in the first post.

Ahhhhhh... Sorry. Forgot.
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GTRS Fiero

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Re: EGR open while parked?
« Reply #8 on: November 17, 2019, 08:53:24 pm »
I need to make the computer open the EGR, so I know that it's happening.
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GTRS Fiero

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Re: EGR open while parked?
« Reply #9 on: November 18, 2019, 05:43:48 pm »
For future reference, this is not possible.  The vehicle must be being driven.
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TopNotch

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Re: EGR open while parked?
« Reply #10 on: November 18, 2019, 07:25:40 pm »
If the EGR is not vacuum operated, then it must be electrically operated. Applying voltage to the appropriate pins on an appropriate connector should get it to open. The wiring diagram of a vehicle using this EGR should help.
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GTRS Fiero

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Re: EGR open while parked?
« Reply #11 on: November 18, 2019, 07:41:56 pm »
That is true, but the need is for the ECU to open the EGR.  In theory, an instruction could be sent to the ECU to cause it to open the EGR, but I don't know how.
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