85 maf sensor troubleshooting help
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Pro
Joined: Jun 2002
Posts: 727
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From: Cheswick Pa
85 maf sensor troubleshooting help
i need some help on trouble shooting my maf sensor , wiring for it and burn-off module..car is throwing code and we put in a known good maf sensor..car runs great when no s.e.s. on then next thing you know s.e.s. is on and car runs like a miss, rough,lack of power ... please help!!!
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Originally Posted by 85autoxr
i need some help on trouble shooting my maf sensor , wiring for it and burn-off module..car is throwing code and we put in a known good maf sensor..car runs great when no s.e.s. on then next thing you know s.e.s. is on and car runs like a miss, rough,lack of power ... please help!!!
Turned out to be the IAC moter which rarely shows up as a code and is rarely discussed in GM/Helms
Replaced it and everything is fine
seeya
Le Mans Master
Joined: Feb 2000
Posts: 9,715
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From: Kempner Texas
Originally Posted by 85autoxr
Also Looking For The Burn Off Module..got One?
Try GMPARTSDIRECT.COM
Jake
Racer
Joined: Dec 2003
Posts: 277
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Originally Posted by 85autoxr
i need some help on trouble shooting my maf sensor , wiring for it and burn-off module..car is throwing code and we put in a known good maf sensor..car runs great when no s.e.s. on then next thing you know s.e.s. is on and car runs like a miss, rough,lack of power ... please help!!!
Remove the front rubber hose from the MAF sensor so you can look in it, ignition on, ground the ALDL terminal E, shut the ignition off, quickly observe the hot wire in the MAF sensor, it should glow red. Easier if you have a helper, as you have to do this quickly or you'll miss the wire heating up.
The module was also used in F body GM vehicles with the port injection on the 305s. hope this helps.
Instructor
Joined: Aug 2004
Posts: 109
Likes: 3
From: Just North of Boston Mass
I also sudenly developed a code34 in my 85.
I read if you clear the code34 and run the car without the maf connected and you get a code 33 it is a bad maf.
if you still get a code34 it is wiring or processor.
I have yet to try it but it may help.
I read if you clear the code34 and run the car without the maf connected and you get a code 33 it is a bad maf.
if you still get a code34 it is wiring or processor.
I have yet to try it but it may help.
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