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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > I have black gunk coming out the exhaust



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      02-01-2013, 06:29 PM   #1
TxBeem
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I have black gunk coming out the exhaust

See the pic. What is going on? I have JB4, run about 30-40% ethanol, and catless DP.
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      02-01-2013, 07:39 PM   #2
Fully_Bolted
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Condensation in the exhaust mixed with carbon. Perfectly normal and nothing to worry about.
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      02-01-2013, 07:43 PM   #3
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Quote:
Originally Posted by Fully_Bolted
Condensation in the exhaust mixed with carbon. Perfectly normal and nothing to worry about.
This.
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      02-01-2013, 08:21 PM   #4
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I have the same exact situation with my E92 I run JB4,DCI, and DP's.... I haven't noticed anything wrong in over a year, I think we're good bro, no need to worry.
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      02-02-2013, 06:23 PM   #5
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I have the same issues and honestly I think it is completely normal as well. If you have catless downpipes atleast, then this should be a thing of the norm. If you have stock downpipes then I dont think the car would do this. Nothing to worry about
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