335d power loss at WOT

Mustard3 · 09-20-2012, 06:36 AM

Update to previous thread:

http://www.e90post.com/forums/showthread.php?t=735804

in case it's of any help to anyone with the same problem.

I took the car into PMW at Chelmsford (would highly recommend) and they diagnosed a faulty exhaust back pressure sensor, which was causing the DPF to not regenerate.

I thought it was odd that I'd never felt it regen in the 6 months I'd owned the car.

As a consequence the DPF had become partially blocked, showing 50mb below maximum pressure. I'm told a first attempt to force a regen failed but a second attempt and extended roadtest did succeed and brought the back pressure to 180mb below maximum.

So all happy again now, they also carried out a smoke test on the vacuum system, confirming no leaks.

superflyguy9 · 09-21-2012, 01:21 PM

:-)

09-20-2012, 06:36 AM	#1
Mustard3 Lieutenant 100 Rep 403 Posts Drives: F31 340i Join Date: Sep 2011 Location: UK iTrader: (1)	335d power loss at WOT - FIXED Update to previous thread: http://www.e90post.com/forums/showthread.php?t=735804 in case it's of any help to anyone with the same problem. I took the car into PMW at Chelmsford (would highly recommend) and they diagnosed a faulty exhaust back pressure sensor, which was causing the DPF to not regenerate. I thought it was odd that I'd never felt it regen in the 6 months I'd owned the car. As a consequence the DPF had become partially blocked, showing 50mb below maximum pressure. I'm told a first attempt to force a regen failed but a second attempt and extended roadtest did succeed and brought the back pressure to 180mb below maximum. So all happy again now, they also carried out a smoke test on the vacuum system, confirming no leaks.
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09-21-2012, 01:21 PM	#2
superflyguy9 Private 2 Rep 54 Posts Drives: 335d F30 xdrive 2016 Join Date: Feb 2012 Location: Manchester, UK iTrader: (0)	:-) __________________
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