'87 IROC with 5.7 TPI MAF issues
Thread Starter
Supreme Member
Joined: Jul 2006
Posts: 1,674
Likes: 3
From: Windsor Ontario
Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
'87 IROC with 5.7 TPI MAF issues
Hey! quick synopsis..
Bought IROC, owner said MAF was bad, so they disconnected it to drive it.. I replaced it with a new one, ran great for 10 minutes.. After I shut it off for a day, I started it up, ran for a second, then shut right off..
I disconnected new MAF, runs fine..
Bad MAF? Bad wiring? Did something wrong?
Bought IROC, owner said MAF was bad, so they disconnected it to drive it.. I replaced it with a new one, ran great for 10 minutes.. After I shut it off for a day, I started it up, ran for a second, then shut right off..
I disconnected new MAF, runs fine..
Bad MAF? Bad wiring? Did something wrong?
Joined: Dec 2004
Posts: 16,752
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: '87 IROC with 5.7 TPI MAF issues
Any stored codes ? Iirc the non weather proof relays on the bulk head in 85-87 were inferior to the later weather proof ones. Small contacts, these often drew too much amperage and destroyed the relay to connecter and internal female connecters.
Thread Starter
Supreme Member
Joined: Jul 2006
Posts: 1,674
Likes: 3
From: Windsor Ontario
Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
Re: '87 IROC with 5.7 TPI MAF issues
Just 12 followed by 34
Joined: Dec 2004
Posts: 16,752
Likes: 996
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: '87 IROC with 5.7 TPI MAF issues
http://chevythunder.com/maf_code_34.htm
Thread Starter
Supreme Member
Joined: Jul 2006
Posts: 1,674
Likes: 3
From: Windsor Ontario
Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
Re: '87 IROC with 5.7 TPI MAF issues
So if you plug the MAF in and it doesn't run at all after resetting the codes... It's probably a bad unit?
Thread Starter
Supreme Member
Joined: Jul 2006
Posts: 1,674
Likes: 3
From: Windsor Ontario
Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
Re: '87 IROC with 5.7 TPI MAF issues
Tried another unit, still won't run... Ordered two new relays for MAF power, and MAF burn off... Will post results.
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