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Swlp Swlp is offline
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Car: E90 335i
Default Misfires cylinder 6 - 09-11-2019, 05:03 AM

Hey people,

Having a misfire in cylinder #6 at high rpm (6000-6500) under high boost. Car is a 08 n54 auto.

Codes I get upon misfire
-29D2 Misfirings cylinder 6
-2C7B Lambda probe behind catalytic converter 2, signal (just started to get this one)

I've replaced the following.
-New index 12 injectors
-New hpfp
-New 2 step colder ngk spark plugs
-New bosch coil packs

I'm clueless as what to do next. I've tried to move the coils around with no difference as well. Seems as it started once I put in the jb4 for the meth. When it misfires it goes into safety for AFR Lean.
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Swlp Swlp is offline
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Default 09-11-2019, 06:50 AM

Here are some logs
Attached Files
File Type: csv 2019-09-11 13_09_22_Map-3.csv (7.9 KB, 13 views)
File Type: csv 2019-09-11 13_14_17_Map-3.csv (6.7 KB, 10 views)
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Default 09-12-2019, 04:30 PM

Anyone ?
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HKD126 HKD126 is offline
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Car: 2014 335i
Default 09-12-2019, 06:11 PM

What size methanol nozzle and what mixture? I had the same thing happening until I cleaned my methanol nozzle (cm10) and increased my methanol content from 50/50 to 70/30.

How do your intake valves look? Walnut blast/clean them recently?
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Default 09-12-2019, 06:14 PM

Yes I have walnut blasted them around 1000km ago & I have two cm7 with 100% methyl hydrate.
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Default 09-12-2019, 06:14 PM

I have been posting around on Facebook groups and people are saying it’s false knock from the transmission chatter
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HKD126 HKD126 is offline
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Default 09-12-2019, 06:18 PM

Stock turbos? Two CM7’s is a lot of flow.
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Default 09-12-2019, 06:21 PM

Pure stage 1 & it does it without the meth aswell if I put it on my custom tune without the meth it does the same thing.
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HKD126 HKD126 is offline
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Default 09-12-2019, 06:30 PM

O2 sensor need to be replaced?
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Default 09-12-2019, 06:32 PM

I just started to get a code the other day for one. I’m actually going to replace both post *** sensors within the next hour at a buddy’s shop
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Default 09-15-2019, 11:08 AM

Replace o2 & do an o2 reset



http://www.fuel-it.biz/

e92 AT 335xi 2.0
Doc Race Kit 6062
Fuel-It!Platinum DIY PI Kit + Stage 2BL
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