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      08-28-2012, 08:05 AM   #11
JamesM3M5
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Drives: E92 335i
Join Date: Sep 2011
Location: Northern VA

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Quote:
Originally Posted by =C= View Post
Don't want to hijack thread but I have a similar problem except it's at idle and unknown which cylinder... Not when cold but when warm... ? Ideas?
How many km on your car? Any codes? What have you done to try to troubleshoot it? If it is at idle, there is a "Smooth Running" screen in the diagnostics via GT1 or Autologic that can show which cylinder is acting up. This screen only works at idle, though.

I chased an idle issue that also persisted up to about 2k RPM, light load. Replaced plugs, cleaned intake, cleaned both MAP sensors (which helped significantly, surprisingly), all 6 injectors, and finally both pre-cat O2 sensors. The O2 sensors finally got rid of the problem. I'm running Procede Rev3 with PWM meth, no codes, no problems anywhere else from 2k up to 7k at any load or boost level.
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