RPMs "shaking"?

Asked by Jan 06, 2015 at 11:07 PM about the 2002 Pontiac Grand Am GT

Question type: Maintenance & Repair

I have a 2002 Pontiac Grand Am GT. When I drive, the RPMs shake a little, as in they
jump a little and then go back down and can't settle on one spot, and the car tends to
shake with the RPMs. It started out happening just when it was shifting gears, but now
it can happen at any speed. It goes away on its own, but I'm worried about serious
damage. I've taken it to three mechanics, but none can give me answers. Does
anyone know what could be happening?

5 Answers

70,355

Is the check engine or service engine soon light flashing while this is going on? If so the engine is misfiring. I'd try a tune up first. HTH. -Jim

The service engine light went on and stayed on when this started happening, but ever since it started getting worse, the light went off and hasn't come back on again. Even when the cruise is set, it does it. And whenever I'm going up a hill, it'll do it.

70,355

Visit your local auto parts store and have them scan your computer. Most stores will do it for free. Post the trouble codes and we can help you further. HTH. -Jim

5,205

Could also be your transmission "hunting" for the proper gear.

315

Is the trac-on light on it could be a misfire, possibly the coil pack, also the fuel pressure, fuel filter or fuel pump. Definitely get a code scan (OB-2) check (for free at Auto Zone & Advanced Auto, but not as reliable sumtimes).

Your Answer

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 1,077 nationwide Grand Am listings starting at $1,899.

ZIP:

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    7,790
  • #2
    John Saffrahn
    Reputation
    1,610
  • #3
    Tom Demyan
    Reputation
    1,530
View All

Related Models For Sale

Used Pontiac Grand Prix
30 Great Deals out of 2,725 listings starting at $1,491
Used Pontiac Firebird
11 Great Deals out of 780 listings starting at $4,300
Used Ford Mustang
674 Great Deals out of 37,864 listings starting at $895
Used Chevrolet Camaro
403 Great Deals out of 30,700 listings starting at $3,550
Used Pontiac Bonneville
3 Great Deals out of 531 listings starting at $1,799
Used Chevrolet Impala
512 Great Deals out of 34,083 listings starting at $950
Used Pontiac Sunfire
316 listings starting at $2,100
Used Chevrolet Malibu
1,037 Great Deals out of 70,644 listings starting at $2,499
Used Honda Accord
1,073 Great Deals out of 61,273 listings starting at $1,099

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.