I know this is the code for the MAF gm/sec hi,what does that really mean and how do I fix it? is it a tuning issue? it just started rescently and does it maybe twice a week with no other codes

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89 FORMULA 350,WS6 SUSPENSION,HOTCHKIS STB,KONI REDS,WONDERBAR,SLP REAR CONTROL ARMS/PANHARD,POLY BUSHINGS,FRESH 355 MOTOR,TCI 12" STREETFIGHTER,TRANSGO SHIFT KIT,3.70 GEARS,FLOWMASTER EXHAUAST,SLP 1 3/4 HEADERS,NO CATS,58 MM BBK,MINIRAM INTAKE,COLD AIR,ALL FREE MODS

 

Check your TPS setting, if its too high it will set that when cold.

 

I just reset the TPS in a complete tune up 2 weeks ago(it was .63 now it's .45)trying to get everything tuned in perfect before engine work.I don't want to have problems when cam and heads are in that were prior issues

 

Check and/or replace your MAF sensor relays. One is for MAF Power and the other is for burn-off, but I don't remember which one is which. For as cheap as they are, it's good insurance to replace both at the same time and not have to worry about them again.

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Greg Westphal
'87 IROC 355TPI/A4

 

Ok i have the same problems, Except that I have replaced the maf burn off relay. But now everyonce in a while i get a 33 and 36 and it is usually a hard code right from the start up. what could cause this?

 

I've traced down the 36 before to a weak battery. Any wiring problems like a short, crossed wires, etc. will cause problems as well. On my car at one time or another the wires got eaten by the radiator fan and that of course threw me a code.

 

Believe it or not it could be your air filters. i got the paper ones wet once and i had a code 33 for a month before i discovered my filters were all crunchy. also replace the relays. expect to pay 8-13$ a piece. replace the FP relay while you're back there, all three are the same.