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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 > White Smoke Rough Idle



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      11-14-2012, 01:33 AM   #1
Blk33zeroxi
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White Smoke Rough Idle

Having an issues with the car tonight. Went to go start it up after work and it was a very very rough start took awhile for the car to turn over once it did really rough idle then clouds of white smoke out of the exhaust and well as my CEL went off and i could smell lots of gas kinda smelt liek a gas station... For awhile the car idled really rough and the smoke was coming out turned off the JB4... after about 2 miles the rough idle stopped as well as the white smoke... As some of you may know NJ is having some gas issues it was hard to get 93 oct gas but i did get some perhaps it was a bad batch? got it form BP so far ive driven 82 miles on it. What can be causing this issue? is there any way to read the codes with the JB4... as of right not car is acting normal still getting stock boost and is driving normal it just had the CEL on now i should mention mods are bov charge pipe catback exhaust as well as JB4 and i only run map 1
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      11-14-2012, 01:45 AM   #2
WesleyC
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You can read codes via the jb4 in-dash controls.
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      11-14-2012, 01:49 AM   #3
n54gte
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Get the usb cable and look it up with your laptop. It might be the gas quality?
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      11-14-2012, 02:23 AM   #4
Blk33zeroxi
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ok just used JB4 to ready them off the speedo def not the easiest thing its said i was throwing 6 codes but it only read 5 here was i got


2F6C Exhaust fumeflap, input signal
EXPLANATION: Unplugging actuator valve in trunk for added exhaust noise.
FIX: Plug back in and clear code. Code will not appear if you disconnect and plug the vacuum line on the exhaust flapper directly.


2A17 DMTL diagnosis module tank leakage, system failure
EXPLANATION: Vapor escaping gas tank.
FIX: Dealer it.

29D2 Misfire Cyl 6

29BB ????

29D0 Misfirings, cylinder 4
so it seems my car in misfiring like crazy... what would cause all of this?
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      11-14-2012, 10:25 AM   #5
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It's the misfires that are concerning. Does it always smoke and sputter at cold start?
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      11-14-2012, 09:25 PM   #6
Blk33zeroxi
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Quote:
Originally Posted by eric@helix View Post
It's the misfires that are concerning. Does it always smoke and sputter at cold start?
nope never i just cleared all the codes drove about 150 miles today and nothing car is driving 100% normal i still havent put it map 1 yet still keeping it on map 0
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      11-14-2012, 09:38 PM   #7
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its a typical oil burning...try to use thicker engine oil next time.
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      11-25-2012, 02:45 PM   #8
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Hi, I'm having the same problem with my car but my car does not have any mods, first noticed it weds 11/14/12 but after driving it around for 15-20 miles it went away. Now today it's happening again but will not go away. I tried driving it around but it's very sluggish and will shut off when It's coming to a stop. I just had the 100k service done at the dealer around the end of October. I think it's bad workmanship on the mechanics part since they did a tune up and replaced the spark plugs.
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      11-27-2012, 11:48 AM   #9
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