What is causing my rpm' s to drop in my 02 grand prix GT? It will run good then I'll stop at a light then it suddenly stalls

Asked by Apr 08, 2015 at 11:02 AM about the 2002 Pontiac Grand Prix

Question type: Maintenance & Repair

2 Answers

33,555

Bad or dirty IAC. (Idle Air Control) valve. When it stalls out, can you smell gas under the hood? A leaky injector could be causing your stall issue also.

1 out of 1 people think this is helpful.

A vacuum leak can and will cause this. Open hood and listen for a hissing noise if it will idle long enough. Rubber hoses break down and crack over the years causing cracks and leaks.

Your Answer

Add photo

Related Questions

  • What is causing my '02 Grand Prix to shift so hard? 4 answers

    I have an '02 Grand Prix, just bought it about 6 months ago for $2450 and has about 140,000 miles on it. I've noticed lately really hard shifts in the trans, really high RPM's. I'll be coming out of...

    2002 Pontiac Grand Prix GT

    -

    Maintenance & Repair

  • Reduced engine power on a 2008 Grand Prix 74 answers

    I have a 2008 Grand Prix, that worked great until last march when i put it in the ditch. it got all fixed from that. But just this past week i was driving it and it came up with REDUCED ENGINE POWER...

    2008 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • 2004 Pontiac Grand Prix Ask me any questions 33 answers

    I have totally replaced and rebuilt this car. I have experienced some major obstacles and solved them. I have experience with this year model Grand Prix. I may be of some help to others.

    2004 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • Why does it stall after it is warmed up? 11 answers

    I have a 2000 Grand Prix GTP that stalls after it warms up with no error codes. Has this happened to anybody else?

    2000 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 3,770
#2 Tom Demyan
Tom Demyan
Reputation 2,520
#3 munron
munron
Reputation 2,010
View All

Related Models For Sale

Used Chevrolet Impala
929 Great Deals out of 36,399 listings starting at $1,800
Used Pontiac Bonneville
3 Great Deals out of 668 listings starting at $2,298
Used Chevrolet Monte Carlo
16 Great Deals out of 1,731 listings starting at $1,695
Used Pontiac Grand Am
1,718 listings starting at $1,995
Used Chevrolet Malibu
1,098 Great Deals out of 79,566 listings starting at $2,495
Used Ford Mustang
682 Great Deals out of 38,461 listings starting at $1,963
Used Chevrolet Camaro
659 Great Deals out of 39,411 listings starting at $2,995
Used Nissan Maxima
406 Great Deals out of 25,102 listings starting at $1,500
Used Jeep Grand Cherokee
1,136 Great Deals out of 70,014 listings starting at $495

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
13 Great Deals out of 463 listings starting at $1,995
2007 Pontiac Grand Prix For Sale
521 listings starting at $2,000
2006 Pontiac Grand Prix For Sale
7 Great Deals out of 618 listings starting at $2,000
2005 Pontiac Grand Prix For Sale
6 Great Deals out of 437 listings starting at $1,195