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Steve, BMW Expert
Category: BMW
Satisfied Customers: 25228
Experience:  BMW Expert
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My 320d sport 2003 is increasingly getting worse with black

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Hi My 320d sport 2003 is increasingly getting worse with black smoke from exhaust, It hesitates when I accelerate with big black cloud, then pulls strong up the rev range.. its done 146k ?
What diagnostics have been carried out?
Customer: replied 2 years ago.

there is no warning lights on dash, I haven't had any diagnostics plugged in as yet .

I will provide an honest answer. I trust this will be appreciated on a saturday. Please remember that a low rating PUNISHES me for being honest and that I receive nothing for my time until a positive rating is clicked.
Black smoke suggests over fueling, so I would suspect an injector issue, airflow sensor issue, or possibly turbo failure. Ultimately proper hands on diagnostics will be required to verify.
Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.
Customer: replied 2 years ago.

Ok thanks , I have cleaned out the egr valve which was fairly good tbh

also has the vortex type crank case breather fitted , I am concerned about you say possible turbo failure , would this cause black smoke ?

also could it be a Cat issue maybe , as my wife drives very slow lol

about a year ago when I drive car hard after a jouney the smoke would clear , but this has slowly got worse over time . thanks again for your advice ..!

A bad turbo can cause smoking.
Not likely a cat
Again, it must be verified hands on with proper testing
If it clears it could be built up oul or fuel burning off
Please do not forget to click on a positive rating
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