Why does my Pontiac Grand Prix idle so rough,?

Asked by Dawn Oct 04, 2020 at 05:52 PM about the 2001 Pontiac Grand Prix GT

Question type: Maintenance & Repair

The RPM fluctuates up and
down, and wants to die when
idling.  It also hesitates when
giving it gas

2 Answers
180

Artificial_Intellige... answered 3 years ago

Sound like it may be the "idle air control valve" IAC if your car runs good above 35 mph that is where i would start...if your "check engine light is on" have the parts store scan for codes to help verify it...it a simple bolt on part so no need to take it to a shop...I would also check for vacuum leaks, clean the "mass air flow sensor" MAF and replace the air filter if it hasn't been replaced for awhile. Ask me any question you like and keep me posted...Good Luck, Tim

Mark helpful

Your Answer:

Related Questions

  • Why does my Pontiac Grand Prix idle so rough,? 2 Answers

    The RPM fluctuates up and down, and wants to die when idling. It also hesitates when giving it gas

    2001 Pontiac Grand Prix GT

    -

    Maintenance & Repair

  • My 1998 pontiac Grand Prix won't idle 1 Answer

    My pontiac Grand Prix starts but will not idle. It will if I lightly put down the accelerator and it revs up fine but as soon as I take my foot off its clunks out. It's not the fuel pump resistor ...

    1998 Pontiac Grand Prix 4 Dr GTP Supercharged Sedan

    -

    Maintenance & Repair

  • 2004 grand prix rough idle 1 Answer

    I have a 2004 grand prix GTP 3.8 supercharged. When I start it up if it doesn't go into reduced power mode it will go up and down in rpms 100-200 unless I keep it above 1000k. It also smells like i...

    2004 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • Why does the heater hose on my 2007 Pontiac Grand Prix 3.8 liter keep busting? 3 Answers

    heater hose is busting and making my car over heat

    2007 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • 2002 Pontiac Grand Prix 3.1 V6 very rough idle 1 Answer

    My husband and I just got a 2002 Pontiac Grand Prix. (Roughly 225000 miles on it) It worked absolutely perfectly when test driving it and nothing looked obviously wrong, so we got it as we are in ...

    2002 Pontiac Grand Prix

    -

    Maintenance & Repair

Own this car?

Share your experience with others.

2001 Pontiac Grand Prix

Write a car review

Review another car

Shortcuts

Search Pontiac Grand Prix Questions

CarGurus Experts

  • #1
    munron
    Reputation
    8,150
  • #2
    James Sparrow
    Reputation
    7,480
  • #3
    Dorian Hendricks
    Reputation
    6,030
View All

Know more, shop wisely

Search

Related Models For Sale

Used Pontiac Bonneville
4 Great Deals out of 50 listings starting at $1,999
Used Pontiac Firebird
16 Great Deals out of 382 listings starting at $5,950
Used Chevrolet Impala
277 Great Deals out of 4,473 listings starting at $500
Used Pontiac Grand Am
67 listings
Used Chevrolet Camaro
597 Great Deals out of 9,060 listings starting at $4,289
Used Chevrolet Monte Carlo
9 Great Deals out of 220 listings starting at $2,950
Used Chevrolet Malibu
1,057 Great Deals out of 19,586 listings starting at $550
Used Ford Mustang
943 Great Deals out of 22,303 listings starting at $2,000

Used Cars For Sale

2007 Pontiac Grand Prix GT For Sale
5 listings starting at $4,999
2006 Pontiac Grand Prix GT For Sale
2 listings
2005 Pontiac Grand Prix GT For Sale
7 listings

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. Content will be removed if CarGurus becomes aware that it violates our policies.