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      10-22-2011, 04:40 PM   #16
Singletrack
4th down; 4th quarter? Renegade.
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Drives: 09 SSII E92 M3; 19 FG M5C
Join Date: Aug 2008
Location: Pittsburgh, PA

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Quote:
Originally Posted by Mike Benvo View Post
It's got nothing to do with driving the car hard, in fact, that will actually prolong the time before the CEL triggers. Drive 3-5 miles at 20-40 mph. Drive 10 miles between 60 and 80 mph. Don't exceed 3000 rpm. No hard fluctuations in throttle in-between. You’ll get the CEL if your sensors are working properly. You shouldn't use extenders, and normally they wont work. The best way to correct the problem is turning off the cat efficiency checking in the software. The Delete-R is a tool which clears the cat efficiency code periodically so the light is not set. You will not pass emissions because the readiness codes will not be set (clearing the codes restarts all of the tests again).

The more erraticly you drive, the more times you will restart certain cat checking routines which set the readiness codes. Your car hasn't set those codes because it hasn't completed all of the cycles. I hope this helps.
Not sure why extenders caused an issue here, but the fabspeed ones work perfectly with their HFC exhaust. Not aware of any negative effects of using them either.
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