Skip the auto shop - Our mechanics make house calls

Q: Car rough idles and worse when engine is warm - 2008 BMW 528i

asked by on

My car has a very rough idle. It has approximately 87,000 miles on it. A decarb has already been performed. When the engine is warm and the car is not in motion (just sitting) is when the rough idling problem is the most noticeable. There is a dip in the idle, but my car does not die. Could you please tell me what is causing this so that I can fix it. Thanks.

A: Hey there. You should first check for any p...

Hey there. You should first check for any problem codes. Next, check for vacuum leaks. Third, check out the idle air control valve - clean it if possible. A professional mechanic, like one from YourMechanic, can help with this diagnosis and repair of your idling issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: My car is having the very same problem but now does not want to turn over it clicks and headlights flash on n out quick...I am soo

Hello. You may have two different issues going on here. If you have a fuel smell then that needs to be checked out first. It is possible that the fuel leak is getting the hoses wet and it is not...

Q: Should I worry about the water pump in my 2011 BMW 328i

Hello. I would not recommend changing the water pump unless there is an issue with it. It is common for the water pump to fail, but it does show signs of leakage first. ANy good mechanic can check it to...

Q: Rough idling

It sounds like your throttle body is dirty. You may want to check it and make sure it is not sticking. Check for loose connections within the system also. Your car may also be idling rough due to your blown...

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 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...