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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 > AR downpipes installed and smoke burning smell HELP



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      01-28-2013, 11:04 AM   #1
jspecvtec
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AR downpipes installed and smoke burning smell HELP

car was pretty stock and ran perfectly fine before. installed AR catless dps (and a tranny fluid change) a few days ago and just got it back. A lot of burnt smell smoke coming from exhaust tips...has anyone had this problem and know whats going on?

thanks
don

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      01-28-2013, 11:37 AM   #2
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what color is the smoke?

You will smell exhaust burnt fuel(white smoke) pretty much all day with catless dps.
It's a different story if it's burn oil smell (black smoke).
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      01-28-2013, 11:42 AM   #3
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New cats will have a bit of a burning smell for the first 50-100 miles. Also all the oil from the techs hands will be burning off the surface of the pipes.
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      01-28-2013, 11:52 AM   #4
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Quote:
Originally Posted by farb View Post
what color is the smoke?

You will smell exhaust burnt fuel(white smoke) pretty much all day with catless dps.
It's a different story if it's burn oil smell (black smoke).
the smoke is white and smells burnt
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      01-28-2013, 12:19 PM   #5
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Quote:
Originally Posted by BMWN54tech View Post
New cats will have a bit of a burning smell for the first 50-100 miles. Also all the oil from the techs hands will be burning off the surface of the pipes.
He said catless DPs!
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      01-28-2013, 12:20 PM   #6
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oil in the exhaust?
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      01-28-2013, 12:30 PM   #7
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A little burning of smoke is common on a new exhaust component. So the question is how much smoke, what smell, and is it going away as you drive the car more?
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      01-28-2013, 12:42 PM   #8
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Quote:
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A little burning of smoke is common on a new exhaust component. So the question is how much smoke, what smell, and is it going away as you drive the car more?
i hope so but these were a used set.
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      01-28-2013, 12:48 PM   #9
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same happened to me when i installed catless downpipes last month...i used my g5 to adjust the wastegates which stopped the smoking and the smell eventually went away
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      01-28-2013, 04:11 PM   #10
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Quote:
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i hope so but these were a used set.
A used set will smell much less than a new one, unless your tech was really greazy.
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