Exhaust smoke problem N54 335i

romeo519 · 04-25-2014, 03:01 PM

My current mods are AFE dual Intake, synapse BOV, AR Design downpipe, Cobb stage 2 aggressive LT, BMS oil catch can. After having the Downpipe installed and cobb stage 2 aggressive 2 weeks ago. Every now and then while driving, heavy smoke comes out of the exhaust for about a minute or two then it completely stops. This occurs after every half hour to an hour of driving around? I'm running 94 Octane from Petro... Is this normal ?

Blaster400 · 04-25-2014, 03:19 PM

Normal with a completely catless exhaust.

Narcosis · 04-25-2014, 03:23 PM

I wouldn't call that normal, unless it's somehow a BMW trait. I put around 50k miles on my last vehicle which had a catless exhaust and never had this behavior.

Blaster400 · 04-25-2014, 03:27 PM

Quote:

Originally Posted by Narcosis

I wouldn't call that normal, unless it's somehow a BMW trait. I put around 50k miles on my last vehicle which had a catless exhaust and never had this behavior.

Well my car did the exact same thing when I went completely catless. Keep in your secondary cats to avoid this.

There are a few threads about this issue and it is normal when you are completely catless.

AK 335i · 04-25-2014, 03:32 PM

meh still not normal.

I was completely catless and mufflerless fbo when i was stock turbos and never had any smoke

except the time i blew a turbo.. there was smoke

romeo519 · 04-25-2014, 03:36 PM

I had a feeling that this could be caused because of the Catless Downpipes I hope that's the reason and nothing serious... That's isn't normal tho? Is there anything that I could do about it?

romeo519 · 04-25-2014, 03:40 PM

Quote:

Originally Posted by AK 335i

meh still not normal.

I was completely catless and mufflerless fbo when i was stock turbos and never had any smoke

except the time i blew a turbo.. there was smoke

I don't think I blew a turbo? I have never had any issues with this car this is the first smoke issue after the catless and cobb..

AK 335i · 04-25-2014, 03:40 PM

Quote:

Originally Posted by romeo519

I had a feeling that this could be caused because of the Catless Downpipes I hope that's the reason and nothing serious... That's isn't normal tho? Is there anything that I could do about it?

i would call it common not normal

not really. ur turbos are prob just old and thats common

AK 335i · 04-25-2014, 03:41 PM

Quote:

Originally Posted by romeo519

I don't think I blew a turbo? I have never had any issues with this car this is the first smoke issue after the catless and cobb..

no if you blew a turbo it would smoke like this

romeo519 · 04-25-2014, 03:43 PM

Quote:

Originally Posted by AK 335i

Quote:

Originally Posted by romeo519

I don't think I blew a turbo? I have never had any issues with this car this is the first smoke issue after the catless and cobb..

no if you blew a turbo it would smoke like this

Oh damn no mines nothing like that!

NOTM3 · 04-25-2014, 06:32 PM

fully cattless and no mufflers, one blown turbo , smoke only out of the blown side.

How many miles are on your car, how long has it been tuned, original turbos???

04-25-2014, 03:01 PM	#1
romeo519 Enlisted Member 3 Rep 39 Posts Drives: 335i BMW N54 Join Date: Mar 2014 Location: Michigan iTrader: (0)	Exhaust smoke problem N54 335i My current mods are AFE dual Intake, synapse BOV, AR Design downpipe, Cobb stage 2 aggressive LT, BMS oil catch can. After having the Downpipe installed and cobb stage 2 aggressive 2 weeks ago. Every now and then while driving, heavy smoke comes out of the exhaust for about a minute or two then it completely stops. This occurs after every half hour to an hour of driving around? I'm running 94 Octane from Petro... Is this normal ?
	Appreciate 0 Tweet Quote

04-25-2014, 03:19 PM	#2
Blaster400 Captain 127 Rep 865 Posts Drives: BMW X3 35i, Porsche Macan S Join Date: Jul 2012 Location: Scottsdale AZ iTrader: (3) Garage List 2018 Porsche Macan S [0.00] 2012 BMW X3 35i [0.00]	Normal with a completely catless exhaust. __________________ MOTIV 750 ST \| MOTIV PI \| 100% E85 \| Fuel-it Stage 4 LPFP \| MOTIV Boost Box + MHD Protune \| Quaife \| Öhlins \| Brembo \| Akrapovic
	Appreciate 0 Quote

04-25-2014, 03:23 PM	#3
Narcosis The dude abides 50 Rep 265 Posts Drives: 2016 F82 Join Date: Jun 2013 Location: Wisconsin iTrader: (2)	I wouldn't call that normal, unless it's somehow a BMW trait. I put around 50k miles on my last vehicle which had a catless exhaust and never had this behavior.
	Appreciate 0 Quote

04-25-2014, 03:32 PM	#5
AK 335i Major 48 Rep 1,290 Posts Drives: black 335i E90 Join Date: Sep 2012 Location: boynton beach iTrader: (0)	meh still not normal. I was completely catless and mufflerless fbo when i was stock turbos and never had any smoke except the time i blew a turbo.. there was smoke __________________ - Proven Power Tampa Built 6466 ST N54 6AT WR 711whp 637wtq -
	Appreciate 0 Quote

04-25-2014, 03:36 PM	#6
romeo519 Enlisted Member 3 Rep 39 Posts Drives: 335i BMW N54 Join Date: Mar 2014 Location: Michigan iTrader: (0)	I had a feeling that this could be caused because of the Catless Downpipes I hope that's the reason and nothing serious... That's isn't normal tho? Is there anything that I could do about it?
	Appreciate 0 Quote

04-25-2014, 06:32 PM	#11
NOTM3 Lieutenant 17 Rep 449 Posts Drives: E90 335i Join Date: Jun 2013 Location: Ft lauderdale iTrader: (3) Garage List 2008 Bmw 335i E90 [0.00]	fully cattless and no mufflers, one blown turbo , smoke only out of the blown side. How many miles are on your car, how long has it been tuned, original turbos??? __________________ Current-E90 335i Past-08 135i,01 c240,03 ram 1500,90 lx stang,91 Crx,97 Del Sol, 94 Del Sol,95 stang Gt,85 stang Gt.
	Appreciate 0 Quote