Q: Rough idle in cold weather.

asked by on December 18, 2015

Vehicle idles rough when I start it up in cold weather.

Rough Idle could be caused by many things and is hard to diagnose. BMW have a known issue with the vanos solenoid that causes this problem. I would have the car checked for codes and have a technician troubleshoot the rough idle problem. It could also be a bad coil pack as well as a number of other things.

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

When stopped at a light rpm will dip from 600 to 500 can then move back up

Although the idle speed can be adjusted, the idle speed of the engine is optimized by the manufacturer for maximum performance and economy of operation. In practice, therefore, there is no value in making any adjustment. Low and/or unstable idle...

Starter drive flywheel noise

Hey there. It's possible that the teeth on the flywheel (manual transmission) or flexplate (automatic transmission) are worn or banged up sufficiently that the starter drive on the starter won't engage properly. Moving the crankshaft as you mention may realign...

Car sputters when accelerating. Not the spark plugs checked those. Now where do I go from here

Ignition coils will fail and cause a sputtering or a misfire, but there could be other issues as well. Since the car is a 96, you might be able to retrieve trouble codes that will tell you which cylinders are...

Related articles

Top Automotive News & Stories: October 1-7
BMW i5 images leak, an ultra-lux Jeep, hydrogen-fueled Colorado ZH2, Fisker's electric future, record plug-in sales, NHTSA Road to Zero, and more.
A Buyer’s Guide to the 2012 BMW 1-Series
The The 2012 BMW 1-Series, which includes both the 128i and the 135i in both a coupe and convertible options, provides the perfect combination of power, performance and luxury. Designed with a focus on thrilling acceleration and a smooth, elegant...
How Does an Engine Idle High and Low?
A common problem that car owners experience is high or low engine idle. A damaged intake gasket, cold air intake, or PCV valve can cause idle issues.