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JB2 JB2 is offline
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Default N55 135i Multiple Misfires and Fuel-related Codes - 09-03-2018, 11:15 AM

Looking for some advice from my fellow N55 friends…

Experiencing multiple cylinder misfires and fuel codes - any insight on the most-likely root issue would be much appreciated.

2012 N55 135i M-Sport

Symptoms:

- long start
- rough idle
- white smoke from exhaust
- sometimes engine barely runs
- onboard computer shows fuel pump error but LPFP and HPFP have both been replaced

Codes:

- 2C90 Blow-Off valve mechanics -- Ignore, tuner code
- 2EFE Combustion misfires, several cylinders detected
- 2F03 Cylinder 5 Misfire Detected
- 2EE0 Combustion misfiring, several cylinders, fuel injection deactivation*
- 2EF1 Combustion misfiring, cylinder 5: Fuel injection deactivation
- 2F00 Cylinder 2 Misfire Detected
- 2EE7 Combustion misfiring, cylinder 2: Fuel injection deactivation
- 2F04 Cylinder 6 misfire
- 2EF4 Combustion misfiring, cylinder 6: Fuel injection deactivation
- 2F02 Cylinder 4 misfire
- 2EED Combustion misfiring, cylinder 4: Fuel injection deactivation
- 2C01 High pressure fuel system, fuel pressure: Minimum pressure undershot
- 2BF5 Rail pressure sensor, plausibility: Minimum pressure undershot
- 2EE2 Combustion misfiring, several cylinders: damaging exhaust gas after start sequence
- 2EF3 Combustion misfiring, cylinder 5: damaging exhaust gas after start sequence
- 2EF6 Combustion misfiring, cylinder 6: damaging exhaust gas after start sequence

Recent Changes:

- Replaced LPFP with Fuel-It Stage 2 LPFP
- Replace HPFP with OEM Remanufactured

Relevant Mods:

- BMS JB4
- BMS Cold Air Intake
- Evolution Racewerks Charge Pipe
- Fuel-It Stage 2 Low Pressure Fuel Pump
- DV+ Performance Diverter Valve
- NGK 5992 / 95770 1-Step Colder Plugs

Logs from today attached.

I am pretty new to this, so any help is greatly appreciated. Thank you!
Attached Files
File Type: csv 2018-09-03 13_28_27.csv (302.3 KB, 112 views)
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JuniorB JuniorB is offline
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Car: 2007 e60 5 series
Default 09-03-2018, 06:19 PM

Looks like the ecu is under attack, don't change anymore parts until you can confirm the mosfets are not fried. The erratic misfiring is a dead giveaway.
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ERIKGARCIA's Avatar
ERIKGARCIA ERIKGARCIA is offline
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Car: M135i
Default 09-03-2018, 07:24 PM

Quote:
Originally Posted by JB2
Looking for some advice from my fellow N55 friends…

Experiencing multiple cylinder misfires and fuel codes - any insight on the most-likely root issue would be much appreciated.

2012 N55 135i M-Sport

Symptoms:

- long start
- rough idle
- white smoke from exhaust
- sometimes engine barely runs
- onboard computer shows fuel pump error but LPFP and HPFP have both been replaced

Codes:

- 2C90 Blow-Off valve mechanics -- Ignore, tuner code
- 2EFE Combustion misfires, several cylinders detected
- 2F03 Cylinder 5 Misfire Detected
- 2EE0 Combustion misfiring, several cylinders, fuel injection deactivation*
- 2EF1 Combustion misfiring, cylinder 5: Fuel injection deactivation
- 2F00 Cylinder 2 Misfire Detected
- 2EE7 Combustion misfiring, cylinder 2: Fuel injection deactivation
- 2F04 Cylinder 6 misfire
- 2EF4 Combustion misfiring, cylinder 6: Fuel injection deactivation
- 2F02 Cylinder 4 misfire
- 2EED Combustion misfiring, cylinder 4: Fuel injection deactivation
- 2C01 High pressure fuel system, fuel pressure: Minimum pressure undershot
- 2BF5 Rail pressure sensor, plausibility: Minimum pressure undershot
- 2EE2 Combustion misfiring, several cylinders: damaging exhaust gas after start sequence
- 2EF3 Combustion misfiring, cylinder 5: damaging exhaust gas after start sequence
- 2EF6 Combustion misfiring, cylinder 6: damaging exhaust gas after start sequence

Recent Changes:

- Replaced LPFP with Fuel-It Stage 2 LPFP
- Replace HPFP with OEM Remanufactured

Relevant Mods:

- BMS JB4
- BMS Cold Air Intake
- Evolution Racewerks Charge Pipe
- Fuel-It Stage 2 Low Pressure Fuel Pump
- DV+ Performance Diverter Valve
- NGK 5992 / 95770 1-Step Colder Plugs

Logs from today attached.

I am pretty new to this, so any help is greatly appreciated. Thank you!
I do not see pressure from LPFP


M135i EWG 2014
[B]Pure Turbo Stage 2 | Port Injection FI | Exhaust |Chargepipe ER | Intercooler Phoenix | Intake BMS | LPFP Stage 2 FI | TMAP N20 3.5 BAR | Pure Inlet Highflow | GFB DV+ | JB4 | BEF Trebila
Hoosier
Your’s Erik🇲🇽

Last edited by ERIKGARCIA; 09-03-2018 at 07:37 PM..
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Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Default 09-03-2018, 10:41 PM

Quote:
Originally Posted by ERIKGARCIA
I do not see pressure from LPFP
No LPFP sensor



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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JB2 JB2 is offline
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Car: BMW 135i M-Sport
Default 09-06-2018, 08:49 AM

I replaced the Fuel Pressure Sensor yesterday - no change.

So now I have a brand new LPFP from Fuel-It, a new OEM remanufactured HPFP, and a new Fuel Pressure Sensor.

The onboard computer still says the Fuel Pump is bad but the 2C01(High pressure fuel system, fuel pressure: Minimum pressure undershot) and 2BF5 (Rail pressure sensor, plausibility: Minimum pressure undershot) are gone.

The white smoke from the exhaust is now even more - a lot of white smoke that smells very strongly like gas - both idling and driving.

Where should I look next? Is it likely that one of the Fuel Pumps I replaced is bad?

What does the massive amount of white smoke that smells like gas tell us?


Current codes:

2EFE Combustion misfires, several cylinders detected
2F03 Cylinder 5 Misfire Detected
2EE0 Combustion misfiring, several cylinders, fuel injection deactivation*
2EF1 Combustion misfiring, cylinder 5: Fuel injection deactivation
2F04 Cylinder 6 misfire
2EE2 Combustion misfiring, several cylinders: damaging exhaust gas after start sequence
2EF3 Combustion misfiring, cylinder 5: damaging exhaust gas after start sequence
2EF6 Combustion misfiring, cylinder 6: damaging exhaust gas after start sequence
2EF4 Combustion misfiring, cylinder 6: Fuel injection deactivation
2F02 Cylinder 4 misfire
2EED Combustion misfiring, cylinder 4: Fuel injection deactivation
00F1
212F
03E0
60F1
222E
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ERIKGARCIA's Avatar
ERIKGARCIA ERIKGARCIA is offline
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Car: M135i
Default 09-06-2018, 09:13 AM

Quote:
Originally Posted by JB2
I replaced the Fuel Pressure Sensor yesterday - no change.

So now I have a brand new LPFP from Fuel-It, a new OEM remanufactured HPFP, and a new Fuel Pressure Sensor.

The onboard computer still says the Fuel Pump is bad but the 2C01(High pressure fuel system, fuel pressure: Minimum pressure undershot) and 2BF5 (Rail pressure sensor, plausibility: Minimum pressure undershot) are gone.

The white smoke from the exhaust is now even more - a lot of white smoke that smells very strongly like gas - both idling and driving.

Where should I look next? Is it likely that one of the Fuel Pumps I replaced is bad?

What does the massive amount of white smoke that smells like gas tell us?


Current codes:

2EFE Combustion misfires, several cylinders detected
2F03 Cylinder 5 Misfire Detected
2EE0 Combustion misfiring, several cylinders, fuel injection deactivation*
2EF1 Combustion misfiring, cylinder 5: Fuel injection deactivation
2F04 Cylinder 6 misfire
2EE2 Combustion misfiring, several cylinders: damaging exhaust gas after start sequence
2EF3 Combustion misfiring, cylinder 5: damaging exhaust gas after start sequence
2EF6 Combustion misfiring, cylinder 6: damaging exhaust gas after start sequence
2EF4 Combustion misfiring, cylinder 6: Fuel injection deactivation
2F02 Cylinder 4 misfire
2EED Combustion misfiring, cylinder 4: Fuel injection deactivation
00F1
212F
03E0
60F1
222E
White smoke I do not think it's due to lack of fuel.


M135i EWG 2014
[B]Pure Turbo Stage 2 | Port Injection FI | Exhaust |Chargepipe ER | Intercooler Phoenix | Intake BMS | LPFP Stage 2 FI | TMAP N20 3.5 BAR | Pure Inlet Highflow | GFB DV+ | JB4 | BEF Trebila
Hoosier
Your’s Erik🇲🇽
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JB2 JB2 is offline
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Default 09-06-2018, 10:14 AM

Quote:
Originally Posted by Dave @ Fuel-it!
No LPFP sensor
Dave,

I replaced the Fuel Pressure Sensor yesterday - no change.

So now I have a brand new LPFP from Fuel-It, a new OEM remanufactured HPFP, and a new Fuel Pressure Sensor.

The onboard computer still says the Fuel Pump is bad but the 2C01(High pressure fuel system, fuel pressure: Minimum pressure undershot) and 2BF5 (Rail pressure sensor, plausibility: Minimum pressure undershot) are gone.

The white smoke from the exhaust smells very strongly like gas - both idling and driving, lots of fuel coming through the exhaust.

Where should I look next? Is it likely that one of the Fuel Pumps I replaced is bad?
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Juan_BIGBOOST_TURBO's Avatar
Juan_BIGBOOST_TURBO Juan_BIGBOOST_TURBO is offline
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Car: 2016 F22 M235i Mineral White
Default 09-06-2018, 10:19 AM

I had a similar issue on a customer's 135i. We changed the HPFP and then the car had the same issues as yours, car would misfire above 12 psi, the issue was a bad remanufactured HPFP, ordered a brand new one from my local dealer and issues gone!


Big Boost, designing world's most innovating and efficient turbo kits!
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10.85 @ 135 1/4 mile


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JB2 JB2 is offline
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Default 09-08-2018, 07:33 AM

Update: Replaced HPFP again yesterday. No change.
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Zygote55 Zygote55 is offline
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Default 12-21-2018, 05:40 AM

Quote:
Originally Posted by JB2
Update: Replaced HPFP again yesterday. No change.
Was there ever a resolution to this? I'm having the exact same problem (same codes, same thick, white fuel-smelling smoke from the exhaust). I've replaced the HPFP and swapped plugs/coils around with no success.
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