Q: Vibration in car while idle but not constant

asked by on August 09, 2017

The car vibrates when I'm idling but not all the time. It used to rev while idling but they replaced the EGR valve which was supposed to fix it supposedly but even after it did it once. It doesn't happen anymore I don't think. I have had so much work done on it recently that I am tired of fixing it without understanding the issue.

I have a job that requires that I be idle with the car on for 8 hours or more. Is there any type of preventative maintenance that can be done to avoid future problems.

Thank you. Max

My car has 209155 miles.

Shaking or vibration may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal idling RPM which may also cause the motor to shake or vibrate more than normal. This creates a loss of power that resonates throughout the motor additionally causing other problems with ignition and fuel timing. Anytime a misfire is caused, this causes an imbalance in the motor which will cause the motor to shake or vibrate. Other issues that may cause this type of shaking or vibration might be broken engine mounts or potentially tires that are out of balance or worn improperly. Engine mounts are generally rubber mounted braces that hold the engine in place to the chassis of the car. When these break or become weak or faulty, this may cause the engine to vibrate heavily. When tires are out of balance, as the speed of the vehicle increases, the vibration will become much more noticeable and pronounced. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your vehicle using a scanning tool which will more accurately indicate what specifically may be causing this.

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

Coolant reservoir empties in one trip

If the radiator cap has failed (i.e. it doesn't hold the specified pressure built up in the cooling system when the car is running), the cap will prematurely open while the car is running and coolant will flow into the...

Hit a curb and my steering wheel is now cocked right a little bit. Is this my lower control arm? 2008 Chrysler Aspen

Hello - this task is best handled by a collision repair estimator at a reputable paint and body shop. S/he is trained to evaluate visible and not-so-visible damage, and the costs to repair. Contact a reputable paint and body shop...

after 20 mins of driving my car acts likes its suffercating until it cools down

A faulty air/fuel oxygen sensor may cause the engine to run rough as it send improper information to the vehicles computer. I'm curious if the Check Engine Light is on. If there is a faulty sensor the vehicle can store...

Related articles

The Best Used Cars to Buy If You Get Motion Sickness
For For people that suffer from motion sickness, even on the shortest car trip, riding in a vehicle can prove to be unbearable. What’s great is that there are a number of cars on the market that can help to...
Understanding the Chrysler Oil Change Indicator and Service Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Chrysler Oil Change Indicator lets you know when and what service your car needs.
How to Get Chrysler Dealership Certified
Chrysler car dealerships offer automotive technician jobs to mechanics who are certified through the MOPAR CAP (Career Automotive Program).