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

4,575

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?

135

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

3,015

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 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Possible MAF problem on 99 Grand Prix ? 2 answers

    My 1999 GT died suddenly last week while driving, i could start if but it would died immediately, unless i kept the RPM's up,but it would run rough and run very rich. I had it towed to the shop and it...

    1999 Pontiac Grand Prix 2 Dr GT Coupe

    -

    Maintenance & Repair

  • What is the max milage that a Grand Prix can get? 45 answers

    My grand prix is a 99 and it has 119,000 miles on it. How much longer can it go?

    1999 Pontiac Grand Prix 4 Dr GT Sedan

    -

    Maintenance & Repair

  • 02 grand prix MAF problem has me stumped 4 answers

    Driving car and it dies. Maf sensor is the code. Change it, reset code, and drive it 2 miles and it dies. Won't start until I clear code. Then I drive for a couple miles and it dies again, repeat......

    2002 Pontiac Grand Prix SE

    -

    Maintenance & Repair

  • Why when I replaced MAF sensor did my catalytic converter overheat? 10 answers

    My 2001 Pontiac Grand Prix 3.8L 3800 had a mass air flow sensor code so I bought a new sensor and the catalytic converter overheated. I replaced the new sensor with the old sensor and the problem we...

    2001 Pontiac Grand Prix GT

    -

    Maintenance & Repair

  • 99 grand prix gt and 98 grand prix 2 answers

    just wondering if the 98 grand prix has the same brakes, suspension, gas tank and rad as 99 grand prix gt

    1999 Pontiac Grand Prix

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 3,719 nationwide Grand Prix listings starting at $1,100.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 3,980
#2 Tom Demyan
Tom Demyan
Reputation 2,660
#3 munron
munron
Reputation 2,070
View All

Related Models For Sale

Used Chevrolet Impala
795 Great Deals out of 34,381 listings starting at $799
Used Pontiac Bonneville
5 Great Deals out of 654 listings starting at $1,599
Used Chevrolet Monte Carlo
15 Great Deals out of 1,662 listings starting at $2,000
Used Pontiac Grand Am
1,646 listings starting at $1,995
Used Chevrolet Malibu
1,003 Great Deals out of 85,673 listings starting at $1,995
Used Chevrolet Camaro
282 Great Deals out of 38,308 listings starting at $1,250
Used Ford Mustang
362 Great Deals out of 44,353 listings starting at $1,000
Used Honda Accord
812 Great Deals out of 81,598 listings starting at $899
Used Nissan Maxima
345 Great Deals out of 25,216 listings starting at $1,400
Used Jeep Grand Cherokee
844 Great Deals out of 68,670 listings starting at $864

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
13 Great Deals out of 462 listings starting at $1,200
2007 Pontiac Grand Prix For Sale
5 Great Deals out of 542 listings starting at $3,250
2006 Pontiac Grand Prix For Sale
8 Great Deals out of 606 listings starting at $1,999
2005 Pontiac Grand Prix For Sale
452 listings starting at $5,900