Fellow N54 friends, I would like input and ideas. I'm new to the form and this problem is driving me insane. My car is currently experiencing a mixture control problem on bank 1 ONLY. Under boost stft will go to -32%, even under light acceleration. It is also Throwing corresponding misfire codes for bank one.
Here is what is done to my car:
MSD80, 335xi
Custom Motiv Flex fuel tune from CKI@Motiv
VRSF factory side inlets
AEM LPFP pushing 75 + psi
Duel cone intake
ECS tuning charge pipe and BOV
ECS tuning Oil catch can
Pushing 22 psi under optimal conditions, E60 ish
95k miles
stock turbos
stock Down pipes
Stock inter-cooler
Stock everything else
Here is what I have done:
Changed injectors and replaced seals on injectors with proper tools
Checked injectors for leaks
New NGK spark plugs (I tried .022 and .018 gap)
New Delphi ignition coils
Replaced all Mosfets
Cleaned and inspected intake manifold
Plugged fuel tank vent port on TB
New intake and TB gaskets
Plugged intake ports in valve cover.
New valve cover gasket
Cleaned map sensor
Replaced both upstream oxygen sensors.
Compression check, 180 psi +- 5psi on all cylinders
When the problem started, It was like a switch was flipped and then it ran like crap since.
I have attached data logs using mhd covering this problem for those willing to review them. I've communicated with Chris CKI@Motiv about this, but hes a busy guy.
I'm running out of ideas. I'm going to pull the turbo inlet on bank one and check the turbine, but I have no smoke or water coming out the exhaust.
The car idles fine, but almost makes a sound like it has a huge vacuum leak under any driving condition. Thoughtful input is appreciated
Here is what is done to my car:
MSD80, 335xi
Custom Motiv Flex fuel tune from CKI@Motiv
VRSF factory side inlets
AEM LPFP pushing 75 + psi
Duel cone intake
ECS tuning charge pipe and BOV
ECS tuning Oil catch can
Pushing 22 psi under optimal conditions, E60 ish
95k miles
stock turbos
stock Down pipes
Stock inter-cooler
Stock everything else
Here is what I have done:
Changed injectors and replaced seals on injectors with proper tools
Checked injectors for leaks
New NGK spark plugs (I tried .022 and .018 gap)
New Delphi ignition coils
Replaced all Mosfets
Cleaned and inspected intake manifold
Plugged fuel tank vent port on TB
New intake and TB gaskets
Plugged intake ports in valve cover.
New valve cover gasket
Cleaned map sensor
Replaced both upstream oxygen sensors.
Compression check, 180 psi +- 5psi on all cylinders
When the problem started, It was like a switch was flipped and then it ran like crap since.
I have attached data logs using mhd covering this problem for those willing to review them. I've communicated with Chris CKI@Motiv about this, but hes a busy guy.
I'm running out of ideas. I'm going to pull the turbo inlet on bank one and check the turbine, but I have no smoke or water coming out the exhaust.
The car idles fine, but almost makes a sound like it has a huge vacuum leak under any driving condition. Thoughtful input is appreciated
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2018-05-25 16_21_28 I8A0S V2.00_Motiv_FlexFuel_Ross_OEM_FBO.bin.csv80.8 KB · Views: 250
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2018-04-29 16_19_56 I8A0S V2.00_Motiv_FlexFuel_Ross_OEM_FBO.bin.csv15.1 KB · Views: 198
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