Mass Airflow Sensor issues
Thread Starter
Instructor
Joined: Oct 2002
Posts: 218
Likes: 4
From: Durham NC
Mass Airflow Sensor issues
Just replaced the MAF sensor on my 85. Now, sometimes upon start up, the service engine light will come on and the car will run rough. Checking the code shows code 33 (MAF). Once I check the code by jumping the proper pins at the ALDL terminal, the light goes out and the car will run great. If I do not reset the computer, the situation is OK. But, if I reset the computer, the same scenario will occur again after a short time. Any ideas as to what this problem could be?
Safety Car
Joined: Aug 2002
Posts: 3,842
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From: SANTA CRUZ CA
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 411
From: WV
If you purchased a rebuilt maf sensor, then the sensor is probably so far off spec it's making the car run like crap...When my maf sensor failed, I went through 3 remanufactured units before I gave up trying to find a good one...It seems the companys that rebuild them don't bring them up to spec, they just rebuild them and send them out the door....I tell everyone, if they're going to use a rebuilt unit, they had better check there car with a scanner after putting it in because it can throw your air/fuel mixture off so far it can do damage to your engine..One of the rebuilt units I bought was so bad it wouldn't let the car start....WW
Last edited by WW7; Nov 6, 2013 at 07:12 AM.
Thread Starter
Instructor
Joined: Oct 2002
Posts: 218
Likes: 4
From: Durham NC
I bought a new sensor. But, it is different design. Instead of having the fine wire, it has something that looks like a circuit boards. Seems much more durable that that thin wire, but I am not sure what else may be different. The car runs great -- as good as it ever has. it is just that I get the code 33 at times and runs rough. Check the code, restart the engine and everything is great -- for a while.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 411
From: WV
I bought a new sensor. But, it is different design. Instead of having the fine wire, it has something that looks like a circuit boards. Seems much more durable that that thin wire, but I am not sure what else may be different. The car runs great -- as good as it ever has. it is just that I get the code 33 at times and runs rough. Check the code, restart the engine and everything is great -- for a while.
Last edited by WW7; Nov 4, 2013 at 09:12 PM.
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Advanced
Joined: Jan 2012
Posts: 84
Likes: 0
From: Jacksonville NC
I had pretty much the same luck with the MAF with the circuit board inside. You can search my old posts but sounds similar to your situation. If yours is still under warranty return it and go with the MAF with the wires inside. Might take a couple of them before you find one that works with your car.
Safety Car
Joined: Jan 2004
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Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 411
From: WV
Here are 2 threads from a few years ago when I had my maf sensor problems.. The first is showing the problem I had , the second is how I solved my problem....
..I don't know if you want to go to this extent or not, but it is a solution to the problem so you will never have to mess with it again..If you can find a good used maf sensor, that would be the best solution... Keep an eye on ebay , they have used maf sensors quite often......WW
http://forums.corvetteforum.com/c4-t...osch-dies.html
http://forums.corvetteforum.com/c4-t...-i-got-ww.html
..I don't know if you want to go to this extent or not, but it is a solution to the problem so you will never have to mess with it again..If you can find a good used maf sensor, that would be the best solution... Keep an eye on ebay , they have used maf sensors quite often......WWhttp://forums.corvetteforum.com/c4-t...osch-dies.html
http://forums.corvetteforum.com/c4-t...-i-got-ww.html
Last edited by WW7; Nov 6, 2013 at 07:33 AM.
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