Skip the auto shop - Our mechanics make house calls

Q: Engine misfiring in a 2007 BMW 328i

asked by on

Engine indicators are showing a misfire in the engine. I changed the air filter and cleaned the carburetor, but the engine is still misfiring.

Your BMW is fuel injected so I’m guessing you cleaned out your throttle body. The next thing I would look into is the coil for the culprit cylinder, have a certified mechanic, like one from YourMechanic, inspect your vehicle and try swapping it with another cylinder and see if the misfire follows the coil. If so, theres your problem. If not, try the same thing with the spark plug and fuel injector until you can move the misfire.

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: Shaking and revving upon startup.

It is normal for the engine to rev a bit higher than normal when a car first starts up. But, after a few seconds it should come back down to normal. In cold weather, it might stay high for a...

Q: Need the color for the speaker wires in the rear doors in my 2013 BMW 328i

Your rear speaker each contain four wires. The left speak is brown/yellow, red/white, brown/blue, and blue/white. The right speaker is blue/brown, blue/black, red/blue, and brown/white.

Q: second gen motor swap

I would recommend keeping all motor components with the same motor (i.e. ECU, wiring harness, etc.) when doing this kind of a swap to eliminate any potential problems. Although there may be some components that are interchangable, you will save...

Related articles

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...