Possible MAF problem on 99 Grand Prix ?

Asked by May 02, 2009 at 10:44 PM about the 1999 Pontiac Grand Prix

Question type: Maintenance & Repair

My 1999 grand prix died on me last week while driving. I tried starting it a few times, it would start and unless i kept the RPM's up it would die. Even with the RPM's up it ran very rough and rich ( you could smell a heavy gas smell ). I had it towed to the repair shop for it only to start right up.
They couldnt find the problem as it showed no codes.
I drove it away and it ran fine for about 20 miles then died again. I had it towed home this time. Some times it starts and runs fine, other times it start but wont hold an idle and dies.
When it starts, again it will start but not hold an idle without keeping the RPMs up, and it runs very rich.
I had the crankshaft sensor replaced abourt a month ago, so i doubt its that .

Any help would be appreciated.

4 Answers

4,955

one suggestion would be to try using a MAF cleaner can seeing if that makes an improvement. Not positive, but I would think is that if the MAF slowly responds to engine condition changes, drivability will be affected. Sometimes if the engine stalls, the PCM may not catch the fault quickly to store a code.

85

What engine is in it, the 3800 or the 3100?

145

i had the same problem on my 2000 and my cousin had the same problem on her 99. it is the MAF

3,175

To determine if it is your mass airflow sensor or not is to lightly tap on it and if engine idle conditions change then it is the maf. using any sort of cleaning agent is not a fix necessarily. mine went at 88,xxx...tap on it and listen...

2 of 2 people found this helpful.

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,684 nationwide Grand Prix listings starting at $1,500.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,390
  • #2
    Tom Demyan
    Reputation
    2,990
  • #3
    munron
    Reputation
    2,390
View All

Related Models For Sale

Used Chevrolet Impala
479 Great Deals out of 33,615 listings starting at $777
Used Pontiac Bonneville
518 listings starting at $1,799
Used Chevrolet Monte Carlo
16 Great Deals out of 1,304 listings starting at $1,950
Used Pontiac Grand Am
1,066 listings starting at $1,899
Used Ford Mustang
709 Great Deals out of 38,398 listings starting at $895
Used Chevrolet Camaro
384 Great Deals out of 30,498 listings starting at $3,500
Used Chevrolet Malibu
1,071 Great Deals out of 72,017 listings starting at $1,896
Used Pontiac Firebird
10 Great Deals out of 784 listings starting at $2,500
Used Honda Accord
1,031 Great Deals out of 60,523 listings starting at $999

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
12 Great Deals out of 414 listings starting at $1,991
2007 Pontiac Grand Prix For Sale
9 Great Deals out of 370 listings starting at $1,675
2006 Pontiac Grand Prix For Sale
451 listings starting at $3,800
2005 Pontiac Grand Prix For Sale
350 listings starting at $1,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.