Q: Vibration in car while idle but not constant

asked by on

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
  1. Home
  2. Questions
  3. Vibration in car while idle but not constant

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: I had my oil pan gasket replaced and car is still leaking oil

Hello, thank you for writing in. An oil leak like this can be tricky. First know that the oil pan, by design, is the lowest component in the oil system, so that gravity will collect the oil in the pan...

Q: I have a 2004 Chrysler PT Cruiser turbo. The car starts right up, but after a few seconds starts to lose power and want to die unt

It is not clear if the poor engine operation you were experiencing is somehow linked to the present no start condition. In any event, before the engine can be diagnosed, it has to be running and so that is the...

Q: My power steering light is on. How much to fix it

Hi Mavis. Thanks for writing in today. When the power steering light is illuminated, it can be caused by multiple component failures, ranging from a faulty or loose sensor, to electrical or mechanical failures including a damaged power steering pump,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...