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 4 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

Shortcuts

Search Pontiac Grand Prix Questions

CarGurus Experts

  • #1
    munron
    Reputation
    8,230
  • #2
    James Sparrow
    Reputation
    7,520
  • #3
    Dorian Hendricks
    Reputation
    6,170
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Pontiac Firebird
14 listings
Used Chevrolet Corvette
29 Great Deals out of 1,066 listings starting at $15,871
Used Chevrolet Impala
8 Great Deals out of 110 listings starting at $1,500
Used Ford Mustang
62 Great Deals out of 1,288 listings starting at $4,995
Used Pontiac Grand Am
3 listings
Used Chevrolet Camaro
12 Great Deals out of 312 listings starting at $9,499
Used Chevrolet Monte Carlo
8 listings starting at $24,998
Used Chevrolet Tahoe
20 Great Deals out of 927 listings starting at $11,900

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.