1987 Iroc 5.7
Joined: Dec 2004
Posts: 16,754
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1987 Iroc 5.7
If your fighting a code 36 you might have the wrong relays installed.
https://www.thirdgen.org/forums/tpi/...6-44-86-a.html
https://www.thirdgen.org/forums/tpi/...6-44-86-a.html
Thread Starter
Junior Member
Joined: Aug 2017
Posts: 6
Likes: 0
Re: 1987 Iroc 5.7
replaced burn off, maf, maf relay with GM. My problem is when cold it starts fine but idles poorly, sputters, pops and a bang noise if I rev it up and sounds like it is sucking air at the MAF. Once it warms up it idles good and the sucking air sound goes away. I have no check engine light on, checked for vac leaks, all tuned.I just keep replacing parts with no success.
Joined: Dec 2004
Posts: 16,754
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1987 Iroc 5.7
I'm wondering if your hearing the iac vacuum cold start. There might be a ninth injector issue (partially plugged).
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