On slight acceleration car shakes but only when small amo...

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 January 09, 2018

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

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

Why would my 4x4 high and low light flash three times when start up and driving in my 2002 Ford Explorer

Hello. Most of the time when this is occurring it is due to an electrical issue with the 4X4 system. I usually remove all of the connections at the transfer case and clean them and add dielectric grease. That may...

Car not starting

If you are having an issue with the security system, the security light on the dash should light up. I would have the battery tested. A dead battery can cause all kinds of computer issues. If you find that the...

My oil light stays on

It is possible that debris from the clean up has found its way to the crankcase and thence onto the oil pump pickup screen partially clogging the sump. Also, you want to make sure that the wiring harness to the...

Related articles

Cadillac Certified Pre-Owned (CPO) Car Program
Drivers Drivers who are shopping around for the perfect used Cadillac may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to...
The Best Used Cars to Buy If You’re a Realtor or Real Estate Agent
If If you make your living as a realtor or real estate agent, you may have a number of considerations when it comes to purchasing a used vehicle. The most common considerations are budget, ability to transport people, and comfort....
How to Buy a Classic Cadillac
Cadillacs are the ultimate in luxurious domestic vehicles and have been for more than century. Classic Cadillacs have been under the General Motors umbrella since 1909 and consistently rank at the top of a list of premier automobiles. Classic...