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      12-20-2012, 01:59 PM   #7
SouthShoreM3
Passes everything but the gas station
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Drives: 2010 E90 M3
Join Date: Jul 2010
Location: Boston, MA

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Thanks Mike. So over the last few days it seems the issue is the AFR SENSOR that is in the secondary O2.

In going to weld an extra bung Over the weekend and this should clear things up...hopefully.

Could also be why the AFR is not getting a consistent reading all the time.