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      01-30-2022, 10:19 AM   #15
ab987
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Drives: X3M, M3, 335i
Join Date: May 2020
Location: Seattle, WA

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Garage List
2010 BMW M3  [9.50]
2008 BMW 335i  [9.00]
2020 BMW X3 M  [9.25]
2016 Mini Cooper  [0.00]
Quote:
Originally Posted by turbo6justin View Post
I have a few logs, I can't figure out how to share them though. The 02's are pretty locked together at about 15:1 when it starts surging and trying to stall they go leaner and diverge from themselves, not always but the most recent log shows more difference bank 1 to bank 2. Once it settles down they hover around 14.7 like they should.

Through this whole years long ordeal I have not gotten any codes specific to this issue, or anything popping up during this bucking/stalling warm up.

I am still skeptical of anything valve cover related, it's newish, no leaks, no sucking sounds.
Upload your log to data zap if you can. I had similar behavior when I swapped my O2s to test a bad one, the AFRs just diverged and diverged until the car died (understandably so)
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