I have a 89 iroc camaro with 350 tpi and i am getting the 33 maf sensor to high. Ive tried different maf sensors that are supposed to be good and still get the same code. Just wondering if there is other better ways to fix. Also using oiled kn air filters if that matters.

 

Burn a new Chip.....Done....I had the same crap with 33 for the longest time....I burned a new chip and raised the threshold of the MAF and bingo!! gone....been running great for over a year now without problems...Could be your relays ...replace the MAF and Burn off relay first....parts are cheap ..try that first...If still fails...burn a new chip...Lots of threads on code 33...look them up

 

i don't mean to sound stupid what do you mean by burn a new chip

 

I'm also getting a code, 33, 34, and 36 I've checked all the terminals and connections and grounds are clean. And since I'm going to school to become a automotive technician, I used the diagnoses process from ALLDATA, and after the test for code 33, it says it may be a faulty MAF, but until I took the car apart, it was fine, and the MAF sat in my basement for 5 years, until last weekend, so I don't think its the maf. What do you think it might be?

 

After i replaced my burnoff relay and maf relay code went away. so i would try it. more than likely it will work.

 

You see thats the thing, I checked, after the ign, is turned off, a few seconds later the MAF Burn Off Relay works, it burns off the element inside the MAF sensor, so thats not the problem.

 

Well heres the deal, this is funny, it was actually nothing wrong, lol.

I first did the normal method of clearing codes on any OBD I GM vehicle. Pull the ECM fuse out for 10 seconds, put it back in, and your good to go. So I did that like 4 or 5 times, put the fuse back in, and checked the codes, and still codes 33, 34 and 35.

Then I pulled the fuse out as All Data said for 5 minutes, tried that a few times; still same thing, 33, 34, 35 codes.

Then I went ahead and did the older, slightly more pain in the *** method, but no big deal, pulled the negative battery cable for about 12 seconds, put it back on, checked the codes, GONE! Then ran the motor, a few times checked codes again, and GONE!

I mean before I was setting up my New CAI I need since the new radiator is bigger than the stock, plastic core junkers, that break. My 87 irocs and my formula both broke the same way, so after the have 125K on them, the plastic turns to shi* and cracks. So I bought a summit universal fit one, and its larger than the factory one, which is good anyway, because this motors making more power now, and I'm fabbing up my upper radiator hold down, and the two attaching points for the fans to bolt to. So anyway, I'm just finishing that up, and have the first half of my CAI done, I just have to cut one more piece of 3" tubing, I'll cut in my machine class, because the band saw does a much nicer cut than a hack saw and straighter than a saw zahl. So I'll post pics of that in a few days.

 

I had a mass air code on my Formula a few years ago, after doing all the test it ended up actually being the ECM. I can't remember the code but I think is was for excessive flow. I replaced the ECM with a reman part from the local parts store and it fixed the problem.