1985 Code 33
Thread Starter
Racer
Joined: Oct 2013
Posts: 483
Likes: 19
From: las vegas nv
1985 Code 33
Okay i am offically scratching my head, 1985 here, replaced the connector for the MAF, Just got a factory MAF, still throwing a code, it idles fine when cold, the when i accelerate it bogs and backfies , when it gets warm its fine, it did the sdame thing with my other MAF , also tried the 88 MAF switch that was horrible, Which i stil have if anybody needs, but i am offically stumped, found a couple bad vacum lines replaced....so now i am at my wits end...HELP
Instructor
Joined: Dec 2016
Posts: 241
Likes: 77
From: Arlington VA
Okay i am offically scratching my head, 1985 here, replaced the connector for the MAF, Just got a factory MAF, still throwing a code, it idles fine when cold, the when i accelerate it bogs and backfies , when it gets warm its fine, it did the sdame thing with my other MAF , also tried the 88 MAF switch that was horrible, Which i stil have if anybody needs, but i am offically stumped, found a couple bad vacum lines replaced....so now i am at my wits end...HELP
I'm going to assume you have no other codes set and that you've cleared the ECM, restarted and have code 33 again. I'd check you're grounds and look over all your wiring for breaks or shorts before you go too far with this.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Code 33 is an open connection from the MAF to the ECM, most likely a broken wire or corroded connector pin. Basically, the voltage is going to 5 volts because of the pullup resistor inside the ECM.
Burning Brakes
Joined: Jan 2014
Posts: 881
Likes: 221
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Tuning in, I have this same exact issue
Thread Starter
Racer
Joined: Oct 2013
Posts: 483
Likes: 19
From: las vegas nv
Thread Starter
Racer
Joined: Oct 2013
Posts: 483
Likes: 19
From: las vegas nv
Safety Car
Joined: Aug 2009
Posts: 3,745
Likes: 275
From: Melbourne, Victoria, Australia
Okay i am offically scratching my head, 1985 here, replaced the connector for the MAF, Just got a factory MAF, still throwing a code, it idles fine when cold, the when i accelerate it bogs and backfies , when it gets warm its fine, it did the sdame thing with my other MAF , also tried the 88 MAF switch that was horrible, Which i stil have if anybody needs, but i am offically stumped, found a couple bad vacum lines replaced....so now i am at my wits end...HELP
Last edited by gerardvg; May 14, 2017 at 07:08 PM.
