bank1 missfires after 4000rpm codes 2c27 2a2b 29e0 getting worse

marconi118 · 01-08-2016, 08:24 AM

My car is FBO running wedge flash 9deg 15psi

It starts misfiring after 4000rpm, always bank 1 cyl 1 2 3 randomly sometimes several cyl at a time

get cel with codes 2c27 2a2b 29e0 and cyl 1 2 3 misfire

it gets worse every day, before was past 5000rpm, now 4000

car has 100Kmiles, new coils, new plugs, walnut blasted and new valve cover gasket, injectors are -9

is it a bad O2 pre cat bank 1?

here a log:

marconi118 · 01-08-2016, 08:26 AM

log

cstmx_ryder · 01-08-2016, 11:30 AM

Have you tried cleaning your VANOS?

marconi118 · 01-10-2016, 12:34 PM

no vanos codes yet, but maybe.. will clean them tomorrow

but strangely it is related only to bank 1

marconi118 · 01-14-2016, 09:56 AM

please help

olly335i · 11-25-2023, 01:51 AM

Find out anything? having very similar problems with my stage 1+ n54

SlowE92 · 11-25-2023, 01:31 PM

Quote:

Originally Posted by olly335i

Find out anything? having very similar problems with my stage 1+ n54

If the misfire is stuck on that bank then it is more than likely 02 sensor.

01-08-2016, 08:24 AM	#1
marconi118 Major 95 Rep 1,184 Posts Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe iTrader: (0)	bank1 missfires after 4000rpm codes 2c27 2a2b 29e0 getting worse My car is FBO running wedge flash 9deg 15psi It starts misfiring after 4000rpm, always bank 1 cyl 1 2 3 randomly sometimes several cyl at a time get cel with codes 2c27 2a2b 29e0 and cyl 1 2 3 misfire it gets worse every day, before was past 5000rpm, now 4000 car has 100Kmiles, new coils, new plugs, walnut blasted and new valve cover gasket, injectors are -9 is it a bad O2 pre cat bank 1? here a log:
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01-08-2016, 11:30 AM	#3
cstmx_ryder Colonel 167 Rep 2,875 Posts Drives: A metal box with a roundel Join Date: Jul 2007 Location: Portland, OR iTrader: (2)	Have you tried cleaning your VANOS? __________________ '08 AW E90 335i PROcede V5 \| BMS DCI \| RR DPs \| ETS FMIC \| FORGE DVs \| Stett CP \| Vanguard \| PSS10
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01-10-2016, 12:34 PM	#4
marconi118 Major 95 Rep 1,184 Posts Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe iTrader: (0)	no vanos codes yet, but maybe.. will clean them tomorrow but strangely it is related only to bank 1
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01-14-2016, 09:56 AM	#5
marconi118 Major 95 Rep 1,184 Posts Drives: 06/07 e93 335i Join Date: Nov 2008 Location: europe iTrader: (0)	please help
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11-25-2023, 01:51 AM	#6
olly335i New Member 0 Rep 13 Posts Drives: 2008 BMW 335i e91 Join Date: Dec 2022 Location: New Zealand iTrader: (0)	Find out anything? having very similar problems with my stage 1+ n54
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