Cleaning an EGR valve on a 95 SSEi
10-17-2004, 08:26 PM
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Cleaning an EGR valve on a 95 SSEi
Can someone give me instruction on how to clean an EGR valve on a 95 SSEi. I know that there are different types of EGR valves and need to know how to clean the one that is on my car. Thanks
10-17-2004, 11:23 PM
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Is yours the digital type ? Is it round and appears to have three cylinders in it with multiple layers ? I have a 1992 . I'm not sure if the 95'* are the same.
JLathem
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10-17-2004, 11:39 PM
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Well, it'* diffferent than mine. Is the linear valve EGR still electric ? or is it vaccum operated ? If it'* electric i guess it still has a solenoid and rubber umbrella vlave in it right ?
JLathem
JLathem
10-18-2004, 02:38 PM
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Yes
First pick up a new gasket at the GM dealership, part # 125672275 or Fel-Pro # 70783. Cost about $3. Or $4. at dealership, Auto Zone wants $12 for one!
The E.G.R. valve has 5 wires going in
1 = Gray
2 = Black Ground
3 = Brown
4 = Gray has 5 volts in run
5 = Pink has 12 volts in run
Remove the 5-wire plug, turn ignition switch to run, and probe socket # 5 for 11.5 to 12 volts and socket # 4 for 5 volts. Turn ignition switch to off set VOM to ohms and probe socket # 2 and make sure it has a good ground, less than 1 ohm.
With VOM still set to ohms probe egr. pin # 1 to pin # 5 , should read 9 to 11 ohms. Pin # 1 and # 5 go to the coil that pulls open the pintle valve when the PCM gives pin # 1 ground.
Pin’* # 2, #3, and # 4 go to internal potentiometer that tells the PCM if the pintle is open or closed.
Probe pin # 2 to pin # 3 should read around 800 ohms.
Probe pin # 3 to pin # 4 should read around 3500 ohms.
Probe pin # 2 to pin # 4 should read 3600 ohms.
The pintle valve is spring loaded and should be air tight when seated. If the valve is not closing use something like dental tools to remove any carbon build up on the pintle face and shaft. The carbon does not come off easily but is worth the time to remove as a new E.G.R. is pricey.
The E.G.R. valve has 5 wires going in
1 = Gray
2 = Black Ground
3 = Brown
4 = Gray has 5 volts in run
5 = Pink has 12 volts in run
Remove the 5-wire plug, turn ignition switch to run, and probe socket # 5 for 11.5 to 12 volts and socket # 4 for 5 volts. Turn ignition switch to off set VOM to ohms and probe socket # 2 and make sure it has a good ground, less than 1 ohm.
With VOM still set to ohms probe egr. pin # 1 to pin # 5 , should read 9 to 11 ohms. Pin # 1 and # 5 go to the coil that pulls open the pintle valve when the PCM gives pin # 1 ground.
Pin’* # 2, #3, and # 4 go to internal potentiometer that tells the PCM if the pintle is open or closed.
Probe pin # 2 to pin # 3 should read around 800 ohms.
Probe pin # 3 to pin # 4 should read around 3500 ohms.
Probe pin # 2 to pin # 4 should read 3600 ohms.
The pintle valve is spring loaded and should be air tight when seated. If the valve is not closing use something like dental tools to remove any carbon build up on the pintle face and shaft. The carbon does not come off easily but is worth the time to remove as a new E.G.R. is pricey.
10-22-2004, 11:02 PM
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This turned out to be an easy fix. Pulled the electrical connections on and off about 5 or 6 times and it is now working fine. Guess I was getting a bad connection. Lets hope it keeps working.
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