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      11-24-2021, 04:44 PM   #11
TSHRTS_M4
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Drives: '16 F82 M4 & '17 F15 X5 MSport
Join Date: Jan 2021
Location: Queen Creek, AZ

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Quote:
Originally Posted by Donteflon View Post
Bank 1 STFT is lean while Bank 2 STFT is right on the money with a great lambda. This supports what heitzke was saying earlier.

Additionally, you're getting timing retardation in Cyls 1-2 which is Bank 1, the same bank where your trims are lean.

I don't think this is a coincidence and there is a correlation.

When is the last time the plugs have been swapped? If it comes down to it, I'd inspect plugs, replace if needed, recheck, and then move onto inspecting injectors.
Plugs were done about 10k miles ago when I did the bolt ons and stage 2 tune ...
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