[tmick5jr]

Hey guys so today I did a wide open throttle pull against a m3. After I left him in the dust he mentioned my car had some black smoke coming from the Exhaust during wide open throttle. I?m currently on map 2 jb4 with downpipes and dci. Is a little black smoke bad/abnormal? Since I have a jb4 can I send a log and have my tune adjusted if it needs it? I just want to make sure my car is running fine. I can also upload the data log onto this thread if that works. Thank you

[tylerboland01]

Black smoke is typically unburned fuel. Your running rich, any codes being thrown?

[335e92tx]

Originally Posted by tmick5jr

I can also upload the data log onto this thread if that works. Thank you

lets see it.

[hththt]

black smoke means you have carbon deposit in the exhaust for far too long. the solution is usually more frequent WOTs to clear them out...

on a more serious note, it's normal on a car with DPs. Mine used to smoke a lot more right after I threw on my DPs 4 years ago, not so much anymore after the first few months

[SlimE92]

Same issue. No codes but after a hard pull I can see some smoke out of the rear view

[335e92tx]

Miles on front O2 sensors?
What are fuel trims?

Originally Posted by hththt

on a more serious note, it's normal on a car with DPs. Mine used to smoke a lot more right after I threw on my DPs 4 years ago, not so much anymore after the first few months

Yes to some degree. They do a lot to clean up exhaust but not unavoidable.

But I did have some people telling me right after I got the new IS that it had some 'smoke' out the ext. I got that cleaned out.. ;-)

[tmick5jr]

No codes being thrown. I?ll upload a log today