Car smokes when in limp mode..

335xiRT1 · 09-16-2010, 08:19 PM

I drive a 135i fully catless with a PROcede,
Recently when the car goes into limp mode (a vanos issue) alot of smoke comes out the exhaust with a burning smell.
Any input would be great, is this normal???
It's never been like this before.
Thanks

OpenFlash · 09-16-2010, 08:32 PM

Nope.. Not normal. I suggest getting your vanos issue sorted out by the dealership as that is a known issue with these engines. Also catless cars will smoke alarmingly if even the slightest amount of oil makes it's way into the exhaust. And some turbos naturally burp more oil than others. Especially after hard runs. Usually it's caused by a semi-clogged oil drain line or leaky seals in the turbos. In these cases, a catchcan can be a useful mod.

335xiRT1 · 09-16-2010, 09:48 PM

Today I changed both Vanos sensors and all spark plugs.
The car use to autotune to 16.5 now I can't get it past the starting point wich is set to 14.5.

09-16-2010, 08:19 PM	#1
335xiRT1 Captain 47 Rep 693 Posts Drives: 2007 335i Join Date: Oct 2008 Location: long island iTrader: (14)	Car smokes when in limp mode.. I drive a 135i fully catless with a PROcede, Recently when the car goes into limp mode (a vanos issue) alot of smoke comes out the exhaust with a burning smell. Any input would be great, is this normal??? It's never been like this before. Thanks
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09-16-2010, 08:32 PM	#2
OpenFlash 1809 Rep 17,960 Posts Drives: A Lot Join Date: Sep 2006 Location: SF Bay, CA iTrader: (0) Garage List 2018 Ducati Panigal ... [0.00] 2016 Mazda CX5 [0.00] 2017 Aprilia Tuono ... [0.00] 2019 BMW M2 Competi ... [0.00] 2015 BMW M5 Competi ... [10.00] 2016 Ducati XDiavel S [0.00] 2016 AMG GT S [0.00] 2011 Ferrari 458 It ... [0.00] 2017 Charger Hellcat [0.00] 2015 KTM Super Duke ... [0.00] 2016 KTM RC390 [0.00]	Nope.. Not normal. I suggest getting your vanos issue sorted out by the dealership as that is a known issue with these engines. Also catless cars will smoke alarmingly if even the slightest amount of oil makes it's way into the exhaust. And some turbos naturally burp more oil than others. Especially after hard runs. Usually it's caused by a semi-clogged oil drain line or leaky seals in the turbos. In these cases, a catchcan can be a useful mod.
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09-16-2010, 09:48 PM	#3
335xiRT1 Captain 47 Rep 693 Posts Drives: 2007 335i Join Date: Oct 2008 Location: long island iTrader: (14)	Today I changed both Vanos sensors and all spark plugs. The car use to autotune to 16.5 now I can't get it past the starting point wich is set to 14.5.
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