Asked by Aug 26, 2011 at 04:31 PM about the 2005 Pontiac Grand Prix Base

Question type: Maintenance & Repair

whenever i am accelerating on the gas in my car, its gives me a bad shake.  As soon as I take my foot off the gas, the shaking stops.  I have had all of my tires replaced and balanced, but it still continues to shake. What could this be??

14 Answers


if it doesnt shake all the time its not your tires. its under acceleration when it shakes? what does that mean? when youre making your engine do more work the car shakes. motor mount? do you have a CEL light on?

5 people found this helpful.

when i was experiencing that, it was because the input clutch plates on my tranny were warped. it's probably just starting, and may not even be your issue. but either way start saving cause that cost me 1400 to fix.

3 people found this helpful.

sounds like you may need spark plugs and wires, as you accellerate this increases the demand on your spark plugs and wires, if thet are worn out ( as they do) your engine will begin to miss. this causes the engine to vibrate, when you release the gas , Other items that WILL need to be checked are your ignition coils and module, these control your spark delivery. . In my experience the coils tend to give out. There are three.

9 people found this helpful.

All of the answers above are valid options as they would all produce your symptoms. Maybe you would like to expand on those comments? I will throw one in there too.. Since it is on acceleration.. Maybe even a bad CV axle.

7 people found this helpful.

i would go with a broken motor nount

3 people found this helpful.

1995 grand am 3.1 179000. I understand what the original ppost is about as I have the same issue. . When driving at a constant speed and i wan to pass another car i hit the gas and it starts to shake violently until i ease up on the gas. now i have done a few things differently to try to get it to stop and it always happens when the trans is in overdrive at a constant speed, when driving in 3rd at a constant speed and i hit the gas in the same way it does not shake. i believe it maybe a problem with the overdrive .

5 people found this helpful.

If you have the ability to take on the task to look at the car yourself or have a knowledgeable person inspect the car. Check the CV joint. Opon acceleration the cars shakes but coasts fine is a clear indication of a bad CV joint. The CV joint may appear fine and the boot may be ok. If you look inside a CV joint, there are 3 main bearings that ride on needle bearings. Those needle bearing will go bad and fall out leaving the main bearing unsupported. This will cause a bad vibration during acceleration. Never judge a book by its cover when inspecting a CV joint. Before you believe anything you read on forums, look into the little things first. Many shops take advantage and will tell you anything.

14 people found this helpful.

Same thing at and idle or when accelerating but once I hit a constant speed it seems to let up. Changed plugs and wires. . . engine light flashes, when at constant speed it just stays lit until I try to speed up then it will flash again

2 people found this helpful.

im having same problem^^ did you fix yours? what was wrong?

1 people found this helpful.

Just fixed the same problem on my 04. It was the CV axles.

3 people found this helpful.

2004 Grand Prix gt when I go in between 60-70mph my car shakes but when I go under that speed or over 70 it stops any ideas ?

1 people found this helpful.

It could be as simple as wheel balancing. I had the same problem - had to change my CV shafts (the bearing that goes into the transmission had some teeth missing - "said in non-mechanical terms)

1 people found this helpful.

Yes i have a 2003 grand am gt my front left tie pops when u turn to deep while drive what can that be n when i pick up speed the left front side bounce

1 people found this helpful.

I replaced both cv axes still vibrates when accelerating, could it be the struts?

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 1,771 nationwide Grand Prix listings starting at $800.


Pontiac Grand Prix Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Impala
448 Great Deals out of 25,776 listings starting at $950
Used Dodge Charger
280 Great Deals out of 32,271 listings starting at $1,850
Used Pontiac Bonneville
334 listings starting at $3,800
Used Chevrolet Monte Carlo
3 Great Deals out of 906 listings starting at $3,498
Used Pontiac Grand Am
726 listings starting at $1,900
Used Pontiac G6
35 Great Deals out of 2,802 listings starting at $699
Used Pontiac GTO
379 listings starting at $7,950
Used Ford Mustang
273 Great Deals out of 37,795 listings starting at $1,350
Used Chevrolet Malibu
465 Great Deals out of 51,837 listings starting at $1,975
Used Buick Regal
83 Great Deals out of 4,008 listings starting at $5,300
Used Honda Accord
539 Great Deals out of 104,189 listings starting at $950

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.