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Steve
Steve, BMW Expert
Category: BMW
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Experience:  BMW Expert
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Have a BMW 2006 black smoke comes out of the tail pipe some

Customer Question

Have a BMW 2006 black smoke comes out of the tail pipe some times when running setting still do you think this is the engine? has about 100000 miles on it..
Submitted: 1 year ago.
Category: BMW
Expert:  internal88 replied 1 year ago.

Hello, I'm Brandon - BMW tech.

The air fuel ratio is running rich. The fuel injector can be leaking, the air filter could be clogged and the oxygen sensors could be bad.

Typically it is the oxygen sensor 's function to adjust the air fuel ratio.

What kind of oil weight are you using?

Customer: replied 1 year ago.
10w40castoroil
Expert:  internal88 replied 1 year ago.

This engine called for Synthetic Oil 5w-30. Is there reason you are putting 10w-40? The oil is thick.

Expert:  Steve replied 1 year ago.
Hello and welcome,
My name is ***** ***** it will be my pleasure to assist you today.
The previous answer is wrong. This only happens after idling, correct?