Q: On slight acceleration car shakes but only when small amount of gas pedal is pressed and speed at the time don't matter

asked by on

When driving at any speed when I even slightly give a small amount of gas and I mean barely even pressing it down the car will shake almost like tires are severely unbalanced but I know it's not the tires and when more gas is given the shaking goes away.. also when I have the air conditioner on or the heat on it seems to be worse the engine runs mint and I don't have no problems with the transmission so only thing I can imagine is either with spark plug issue or coil packs or maybe something with the fuel system but it's really strange that it only happens when I'm barely pressing the pedal down and goes away when more fuel was given...thanks !! And like I said it doesn't matter what the speed is at the time it does it whether I'm going 10 miles an hour or 80 miles an hour as soon as I apply only a small amount of fuel it shakes. I'm 45 years old I've been working on cars since I was 16 and I'm stumped I can usually diagnosed a problem just by the feel and sound of it but not this time

My car has 147000 miles.
My car has an automatic transmission.

Hi Rob. Thanks for the question today. There are literally a dozen or more possible reasons why your DeVille is acting in this way. Sometimes failing wheel bearings will create the vibration you’re explaining, while in other instances, loose motor or shock mounts, a vacuum or exhaust leak or ignition timing issues can create similar conditions. As with any repair or hard to diagnose the issue, having a second set of eyes help you is typically the best way to find the problem.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. On slight acceleration car shakes but only when small amount of gas pedal is pressed and speed at the time don't matter

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Transmission was replaced but not set in right so it won't bolt down believe it's disk between motor and transmission

The problem sounds like the transmission torque convertor is not inserted all the way into the transmission. If you try and force it you will damage the transmission. You need to spin and push in the torque convertor until it...

Q: Why does a crackling , popping sound come from my vents when I turn on the account or heat .

When you command air conditioning or heat there are mode doors that direct the airflow to the requested place. Positions are floor, windshield, vent /floor, and defrost/floor. The doors move in a housing that has a tight fit. These doors...

Q: Exhaust manifold

Hello. Thank you for writing in. This procedure can be difficult to accomplish for several reasons. One, if you are not set up correctly, then you could be working against yourself. Make sure you have the exhaust manifold propped up...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...