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Bad wired EGR to ECM?

Old 11-08-2018, 12:39 PM
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Car: Pontiac Firebird Formula
Engine: 3.1 LH0
Transmission: 700R4
Axle/Gears: Automatic
Bad wired EGR to ECM?





Hi guys, I found this thing around the EGR zone. The dark blue wire grounded to the
firewall?

Furthermore, I found this brown wire soldered to the pink/black one that goes to EGR connector. Can you tell me what kind of functions do that two wires? I just want to restore the original wiring messed up by the old owner...

Itís a 1990 Firebird, 3.1 Lh0

Thank you guys!
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Old 11-08-2018, 12:51 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Bad wired EGR to ECM?

Pink/blk is power to the ccp/ air and egr solenoid.
http://austinthirdgen.org/mkportal/m...ine_wiring.gif
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Old 11-08-2018, 12:53 PM
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Re: Bad wired EGR to ECM?

Dark blue might be the fan pressure switch. Does the fan run with the key on ?
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Old 11-08-2018, 05:00 PM
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Car: Pontiac Firebird Formula
Engine: 3.1 LH0
Transmission: 700R4
Axle/Gears: Automatic
Re: Bad wired EGR to ECM?

Thanks for your reply, the fan stays off with key on. The EGR seems always to be off too, in every condition, but I hear a clicking noise from it
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