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  1. #1
    GT Level Member NotEnoughGPs's Avatar
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    Default No CEL when MAF sensor going bad

    It has happened again.
    This is 2 times this year in 2 different GP's that I have experienced all sorts of problems with stalling, no starts, missing, loss of power, boost gauge showing full boost when barely touching the gas pedal, etc. I was checking all sorts of parts on the car and replaced a fuel pressure regulator, and removed and cleaned all kinds of parts.
    But even though I was aware of the fact that the Mass Airflow Sensor could be bad, and was told to check the MAF, in my stupidity, I still did not swap the MAF out. I figured there was no check engine light on.
    Well, to make a long story short, I installed a good MAF into a GTP that was running very poorly and stalled and would not start. As I went to start the car on the 2nd try, it fired right up and has been running almost perfect. The bad MAF was in the car when I bought it, and I would have saved myself lots of stress and loss time if I would have replaced it on the 1st day I got it home.

    So, learn from my mistake that if you are experiencing any issues with starting, idling, missing, or whatever, make sure there is a full functioning MAF sensor in place. The CEL will not alert you to a MAF sensor going bad.

  2. #2
    GrandPrix Junkie
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    Default Re: No CEL when MAF sensor going bad

    Yep, also make sure the wiring going to it is good. And don't go aftermarket on the MAF, get a OE GM one as the others seems to be hit or miss on if they will work or not.

  3. #3
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    Default Re: No CEL when MAF sensor going bad

    my favorite test is to tap on it with a fingernail while it's running. it the engine spits, sputters or stalls..it's a maf

  4. #4
    GT Level Member NotEnoughGPs's Avatar
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    Default Re: No CEL when MAF sensor going bad

    Hey, as far as getting a new MAF sensor for the Grand Prix, what model years are compatible with each other? Is it 1997-1998 models have one MAF that works for both years, and then there is a MAF for the 1999-2003 years?

  5. #5
    GTP Level Member 231FUN's Avatar
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    Default Re: No CEL when MAF sensor going bad

    Quote Originally Posted by NotEnoughGPs View Post
    Hey, as far as getting a new MAF sensor for the Grand Prix, what model years are compatible with each other? Is it 1997-1998 models have one MAF that works for both years, and then there is a MAF for the 1999-2003 years?
    1997-1998
    1999-2003
    2004-2008

  6. #6
    Killa Bee Scottydoggs's Avatar
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    Default Re: No CEL when MAF sensor going bad

    its part # is right there on top of it, match it up. they came in many gm cars. na or sc.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  7. #7
    GT Level Member wstefan20's Avatar
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    Default Re: No CEL when MAF sensor going bad

    I have a spare oem sensor lying around, so if you need one, just pm me.

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