CEL reduced power problem 08 E92 M3
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10-30-2012, 08:20 PM
BimmerPost Supporting Vendor
Drives: 08 E90 M3 / 400whp Turbo 7
Join Date: Apr 2008
Bad plug, bad coil pack, bad idle control valve, bad throttle actuator..
These would be common issues that would cause that.
If a cylinder went, you'd be in a world of hurt. I doubt it unless you did something out of the ordinary.
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