E46Fanatics - View Single Post - Limp mode from MAF
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Old 11-29-2012, 04:37 AM   #80
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Join Date: Jul 2012
Location: Liverpool
Posts: 1,524
My Ride: 320i SE Coupe
Originally Posted by Weste46 View Post
This Saturday I'll be having someone watch the live data from my 1.4.0 scanner to see if anything peculiar happens when limp mode engages..

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Pay attention to the cylinder adaptation values. These relate to how well the computer is managing to keep the air/fuel mixture close to the ideal 14.7:1 ratio. It uses the input from the MAF and O2 sensors to adjust the fuel supply to the cylinders. I have attached a useful document on adaptation. It may help in diagnosing which cylinders are faulting.
Attached Files
File Type: pdf BMW_Adaptation.pdf (25.7 KB, 84 views)
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