2 o2 sensors?
11-12-2010, 01:41 PM
#11
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I turned the key to the point when I heard the fuel pump kick on,then I disconnected the EGR and heard nothing. I did it about three times and still heard nothing. I didn't start the engine because I wouldn't be able to hear anything. I assume it should sound like a ''ping" or something right?
11-12-2010, 02:08 PM
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Here, I made a write up to test the solenoid. It'* really easy to do.
https://www.gmforum.com/showthread.p...48#post1490248
https://www.gmforum.com/showthread.p...48#post1490248
11-12-2010, 09:30 PM
#15
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I tested the EGR tonight and it opened and closed fine,I'm sure that if it was working in the car I would've heard it open and close. I'm thinking a possible wiring problem maybe there'* a loose wire near the plug
12-26-2010, 01:16 PM
#19
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I finally changed the egr plug today and there is no difference. I tested the old plug with a continuity tester and it worked fine, I even tested the exposed wires coming from the wiring harness with a volt tester and didn't detect any voltage. So what do I do now? Is there a relay that might be bad? Or a bad fuse? Or maybe a bad wire inside the harness?
12-26-2010, 01:34 PM
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OK, this is going to get a bit more involved here, so I will do my best to describe it.
At the EGR plug you have 5 wires
Black is signal ground, you should have continuity between that and ground.
Gray is 5v reference signal, If no signal then test continuity between that wire and pin 29 on the blue PCM plug
Pink is part of the EVAP system, test between the plug and pin 68 on the blue PCM plug
Brown, test between plug and pin 65 on the clear PCM plug
Looks like there are 2 gray wires, you will need to test both.
Symptoms of a problem with the gray wire is lack of power, rough idle, and chugging
Symptoms of a problem with the brown wire is incorrect idle, cuts out, chugging.
At the EGR plug you have 5 wires
Black is signal ground, you should have continuity between that and ground.
Gray is 5v reference signal, If no signal then test continuity between that wire and pin 29 on the blue PCM plug
Pink is part of the EVAP system, test between the plug and pin 68 on the blue PCM plug
Brown, test between plug and pin 65 on the clear PCM plug
Looks like there are 2 gray wires, you will need to test both.
Symptoms of a problem with the gray wire is lack of power, rough idle, and chugging
Symptoms of a problem with the brown wire is incorrect idle, cuts out, chugging.