Thread: N55 Lean Issues
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      02-11-2020, 02:15 PM   #1
Versauce
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Drives: 2011 BMW 335i
Join Date: Feb 2020
Location: Troutdale, OR

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N55 Lean Issues

Hey guys,

This is my first post, so hopefully I have this in the right place. My 2011 335i w/ 88k miles (MHD Stage 1+, 91 tune running 92 octane) seems to be running lean. I had shadow codes related to the HPFP back in December in which I replaced it with a remanufactured from ECS Tuning along with the rail pressure sensor. Recently I've been getting lean codes 2BC0, 2C42, accompanied with infrequent stalling at a stop, idle fluctuation/surging (not large increments). I ran a smoke test and only found smoke seeping from the air intake hose that connects to the turbo inlet. I've ordered a replacement gasket for that connection.

Spark plugs are under 5k being one-step colder. I dont know if coil packs or injectors were replaced before my ownership.

MHD data logs for a few pulls below.

https://datazap.me/u/versauce/log-1
https://datazap.me/u/versauce/log-2

Any help is greatly appreciated.
Appreciate 0