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      04-02-2013, 06:32 AM   #22
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Drives: Goggomobil
Join Date: Jul 2007
Location: Kangaroo land

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Garage List
2014 BMW X5 30d  [0.00]
2007 E92 M3  [0.00]
Originally Posted by thekurgan View Post
My only guess would be you're running a bit on the rich side? Lots of stop-and-go situations? Short distances when cold? O2 sensors starting to age? I'll put up a photo of mine, done at 22k or so, they didn't look that bad.
What's the cause of the rich running? I've had BPM tune for about three months or so, and I don't think the build up is from that three-month period. If it's rich then how do I rectify it? I also have a BMC air filter.

2007 E92 6MT - Silverstone II with /// Performance Exhaust with ACM Test Pipes and BPM Sport Stage II Dev-Tune - Proper engine warm up, 12-monthly oil change, Castrol TWS 10w-60
2014 F15 X5 3.0d