Random misfire no check engine light


Asked by Apr 01, 2015 at 09:28 AM about the 2000 Pontiac Grand Prix GTP

Question type: Maintenance & Repair

Changed MAFS 3x, plugs, wires, O2 sensors, TPS, AIC, MAP, COILS, ignition module,
coolant temp sensor, crank and cam sensor, catilytic converter. If I unplug the MAFS the
random misfire goes away. Also it's misfiring under a load..( drive or reverse). Good fuel
pressure. Anything helps

1 Answer


As far as the check engine light... its throwing a malfunction indicator lamp

Your Answer

Add photo

Related Questions

  • My car jerks and stutters and the check engine light is on 15 answers

    2002 Pontiac Grand Prix GT


    Maintenance & Repair

  • Could it be the MAF?? Please help!! 14 answers

    About 5 months ago after stopping at the gas station for a soda I started the car, it was very rough at idle, put it in reverse and the check engine light came on. It was sputtering and shaking. I o...

    2008 Pontiac Grand Prix Base


    Maintenance & Repair

  • Check gas cap/engine light 4 answers

    My engine light is on and it says check gas cap. I have replaced the gas cap and this has not fixed the problem. Any suggestions?

    2008 Pontiac Grand Prix


    Maintenance & Repair

  • 06 grand prix gxp misfire 1 answer

    I have a 06 grand prix gxp has 135000 and been misfiring and running ruff has it scanned and said number 7 fuel injector was bad changed that still doing the same thing now saying has misfires c...

    2006 Pontiac Grand Prix GXP


    Maintenance & Repair

  • Random Misfire 17 answers

    As much as i like to think i know about cars this one has me stumped. I recently went and drove my car today, and it had acted funny when i started it up. It started backfiring at idle. So i let it wa...



    Maintenance & Repair

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Reputation 3,670
#2 Tom Demyan
Tom Demyan
Reputation 2,450
#3 munron
Reputation 1,950
View All

Related Models For Sale

Used Chevrolet Impala"
891 Great Deals out of 35,538 listings starting at $795
Used Pontiac Bonneville"
863 listings starting at $2,995
Used Chevrolet Monte Carlo"
7 Great Deals out of 2,061 listings starting at $3,850
Used Pontiac Grand Am"
1,968 listings starting at $1,995
Used Chevrolet Malibu"
1,101 Great Deals out of 72,184 listings starting at $1,300
Used Chevrolet Camaro"
810 Great Deals out of 39,038 listings starting at $2,650
Used Ford Mustang"
724 Great Deals out of 41,220 listings starting at $900
Used Nissan Altima"
1,379 Great Deals out of 87,351 listings starting at $1,195
Used Nissan Maxima"
441 Great Deals out of 23,883 listings starting at $1,500

Used Cars For Sale

2005 Pontiac Grand Prix GTP For Sale
58 listings starting at $3,495