Misfiring at idle only...burnt valve/cylinder?

maui86 · 04-15-2010, 11:03 PM

im on the original injectors and software 34.x i believe. mine started after i messed up the wires(routed wrong and wires touched the turbo when hot) to bank2 sensor1 o2. haha. did any of you guys do datalogs of the issue? i get lean spikes when it happens.

watever617 · 04-15-2010, 11:49 PM

Car is at the dealer at the moment. I had a tech in the car with me so he can feel the vibration/shutter. I drove it hard for like 2 mins and put it in park. He was able to feel the hiccups and said that it was not normal. Just waiting for a reply back as they had to keep it overnight. Still no codes btw.

CBR335 · 04-16-2010, 01:48 AM

I honestly think that the unusually rough idle is due to irregular fuel pressure. These issues were always worse when I was "close" to HPFP failure, which is always around the corner in these cars. I've had two pumps in 16,000 mi and the idling was very irregular for a couple thousand miles before the last one died until I started throwing fuel pressure codes where rough startups began. The roughness got progressively worse toward pump failure, but was eliminated after the new pump was installed.....for a while.

The roughness is now back again after 14,000 mi and what do you know? Long cranks just started and .......fuel pressure at injection release codes.

My 2 cents, but who knows. Injectors, coils, VANOS, etc., etc.

TriniJots · 04-16-2010, 11:05 AM

I still have the 881 pump, and I also have the new software update. Is this what may cause it, I will be taking my car into the dealer soon. Scanned it, but I see no codes, I hope they would be able to do something

watever617 · 04-19-2010, 11:29 AM

Dealer stated they want to replace HPFP but waiting on BMW approval. I just noticed that everytime it backfires my vacuum will fluctuate dunno why it does that. Spark issue?

twenzel · 05-25-2010, 09:09 PM

I am having these same issues but mine seem to be more dramatic than what you guys are seeing... codes from scan are below. I have had all the latest DME updates this month, plus the dealer replaced all injectors and sparkplugs.... nothing seems to be working. The dealer has said they will not trouble shoot anymore unless I remove my downpipes and intercooler which I am doing so I can bring it back in. I am not running any tune or any other mod except the FMIC and DPs.

2D2E:
2D2E Angle of throttle valve - intake pipe underpressure, correlation
Error will cause a warning light
Error is currently present
Test conditions have not been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 54632kms 33946miles
Engine speed 2,368.00 rpm
throttle valve sensor 1 7.47 °TPS
suction pipe pressure 77.00 kPa
relative load 0.00 %

Event 2Odometer 54640kms 33951miles
Engine speed 2,688.00 rpm
throttle valve sensor 1 3.73 °TPS
suction pipe pressure 32.00 kPa
relative load 0.00 %

Event 3Odometer 54648kms 33956miles
Engine speed 768.00 rpm
throttle valve sensor 1 3.73 °TPS
suction pipe pressure 82.00 kPa
relative load 0.00 %

2A2C:
2A2C Fuel mixture control 2
Error will cause a warning light
Error is currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 54640kms 33951miles
speed 704.00 rpm
suction pipe pressure 68.00 kPa
relative load 0.00 %
matching throttle valve model (factor) 1.00 -

2A2B:
2A2B Fuel mixture control
Error will cause a warning light
Error is currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 54640kms 33951miles
speed 1,344.00 rpm
suction pipe pressure 50.00 kPa
relative load 0.00 %
matching throttle valve model (factor) 1.00 -

29CF:
29CF Misfirings, cylinder 3
Error will cause a warning light
Error is currently present
Test conditions have been completed
Timeout

Freeze Frame Information
Event 1Odometer 54640kms 33951miles
Engine temperature 102.00 °C
load value for misfire detection 15.63 %
Engine speed 832.00 rpm
Lambda integrator group 1 33.59 %

Event 2Odometer 54648kms 33956miles
Engine temperature 101.25 °C
load value for misfire detection 12.50 %
Engine speed 768.00 rpm
Lambda integrator group 1 33.59 %

Event 3Odometer 54648kms 33956miles
Engine temperature 103.50 °C
load value for misfire detection 14.45 %
Engine speed 864.00 rpm
Lambda integrator group 1 33.59 %

29D0:
29D0 Misfirings, cylinder 4
Error will cause a warning light
Error is not currently present
Test conditions have been completed
Timeout

Freeze Frame Information
Event 1Odometer 54640kms 33951miles
Engine temperature 102.00 °C
load value for misfire detection 15.63 %
Engine speed 832.00 rpm
Lambda integrator group 2 33.59 %

Event 2Odometer 54648kms 33956miles
Engine temperature 101.25 °C
load value for misfire detection 12.50 %
Engine speed 768.00 rpm
Lambda integrator group 2 33.59 %

29CC:
29CC Misfirings, several cylinders
Error will cause a warning light
Error is currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 54640kms 33951miles
ambient temperature 30.75 °C
rail pressure 48,906.64 hPa
voltage Kl. 87 13.71 V
counter recognition bad road 0.00 -

Event 2Odometer 54648kms 33956miles
ambient temperature 29.25 °C
rail pressure 48,906.64 hPa
voltage Kl. 87 13.20 V
counter recognition bad road 0.00 -

Event 3Odometer 54648kms 33956miles
ambient temperature 29.25 °C
rail pressure 48,906.64 hPa
voltage Kl. 87 13.91 V
counter recognition bad road 0.00 -

29CD:
29CD Misfirings, cylinder 1
Error will cause a warning light
Error is currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 54648kms 33956miles
Engine temperature 103.50 °C
load value for misfire detection 15.63 %
Engine speed 800.00 rpm
Lambda integrator group 1 33.59 %

29CE:
29CE Misfirings, cylinder 2
Error will cause a warning light
Error is currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 54648kms 33956miles
Engine temperature 103.50 °C
load value for misfire detection 15.63 %
Engine speed 800.00 rpm
Lambda integrator group 1 33.59 %

watever617 · 05-28-2010, 01:03 PM

Dealer change all my injectors, spark plugs, fuel pump and updated software. Doesnt misfire anymore at operating temps during idle.

Glad it was nothing major as I went WOT one nite and it peaked over 22PSI!! thought i blew/burnt a cyclinder or something.

joec500 · 05-28-2010, 01:46 PM

Quote:

Originally Posted by watever617

Dealer change all my injectors, spark plugs, fuel pump and updated software. Doesnt misfire anymore at operating temps during idle.

Glad it was nothing major as I went WOT one nite and it peaked over 22PSI!! thought i blew/burnt a cyclinder or something.

uhhhh 22psi...that's not good.

04-15-2010, 11:03 PM	#23
maui86 Captain 38 Rep 738 Posts Drives: 07 335i Join Date: Nov 2007 Location: paradise iTrader: (1)	im on the original injectors and software 34.x i believe. mine started after i messed up the wires(routed wrong and wires touched the turbo when hot) to bank2 sensor1 o2. haha. did any of you guys do datalogs of the issue? i get lean spikes when it happens. __________________ http://videos.streetfire.net/video/s...rays_37268.htm gotta do what i gotta do to get them donuts 04 spec-v: rip dec07
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04-15-2010, 11:49 PM	#24
watever617 Private First Class 17 Rep 161 Posts Drives: bicycle Join Date: Sep 2009 Location: U S of A iTrader: (1)	Car is at the dealer at the moment. I had a tech in the car with me so he can feel the vibration/shutter. I drove it hard for like 2 mins and put it in park. He was able to feel the hiccups and said that it was not normal. Just waiting for a reply back as they had to keep it overnight. Still no codes btw.
	Appreciate 0 Quote

04-16-2010, 01:48 AM	#25
CBR335 Private First Class 12 Rep 178 Posts Drives: 2009 E92 335 Join Date: Jul 2009 Location: San Diego, CA iTrader: (0)	I honestly think that the unusually rough idle is due to irregular fuel pressure. These issues were always worse when I was "close" to HPFP failure, which is always around the corner in these cars. I've had two pumps in 16,000 mi and the idling was very irregular for a couple thousand miles before the last one died until I started throwing fuel pressure codes where rough startups began. The roughness got progressively worse toward pump failure, but was eliminated after the new pump was installed.....for a while. The roughness is now back again after 14,000 mi and what do you know? Long cranks just started and .......fuel pressure at injection release codes. My 2 cents, but who knows. Injectors, coils, VANOS, etc., etc. __________________ JB4 FTW
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04-16-2010, 11:05 AM	#26
TriniJots Driver 104 Rep 659 Posts Drives: 2021 M340i Join Date: Feb 2010 Location: South Florida iTrader: (3)	I still have the 881 pump, and I also have the new software update. Is this what may cause it, I will be taking my car into the dealer soon. Scanned it, but I see no codes, I hope they would be able to do something
	Appreciate 0 Quote

04-19-2010, 11:29 AM	#27
watever617 Private First Class 17 Rep 161 Posts Drives: bicycle Join Date: Sep 2009 Location: U S of A iTrader: (1)	Dealer stated they want to replace HPFP but waiting on BMW approval. I just noticed that everytime it backfires my vacuum will fluctuate dunno why it does that. Spark issue?
	Appreciate 0 Quote

05-25-2010, 09:09 PM	#28
twenzel Captain 55 Rep 754 Posts Drives: 15 Audi S3 Join Date: Aug 2008 Location: Austin TX iTrader: (2)	I am having these same issues but mine seem to be more dramatic than what you guys are seeing... codes from scan are below. I have had all the latest DME updates this month, plus the dealer replaced all injectors and sparkplugs.... nothing seems to be working. The dealer has said they will not trouble shoot anymore unless I remove my downpipes and intercooler which I am doing so I can bring it back in. I am not running any tune or any other mod except the FMIC and DPs. 2D2E: 2D2E Angle of throttle valve - intake pipe underpressure, correlation Error will cause a warning light Error is currently present Test conditions have not been completed Short circuit or signal interruption Freeze Frame Information Event 1Odometer 54632kms 33946miles Engine speed 2,368.00 rpm throttle valve sensor 1 7.47 °TPS suction pipe pressure 77.00 kPa relative load 0.00 % Event 2Odometer 54640kms 33951miles Engine speed 2,688.00 rpm throttle valve sensor 1 3.73 °TPS suction pipe pressure 32.00 kPa relative load 0.00 % Event 3Odometer 54648kms 33956miles Engine speed 768.00 rpm throttle valve sensor 1 3.73 °TPS suction pipe pressure 82.00 kPa relative load 0.00 % 2A2C: 2A2C Fuel mixture control 2 Error will cause a warning light Error is currently present Test conditions have been completed Short circuit or signal interruption Freeze Frame Information Event 1Odometer 54640kms 33951miles speed 704.00 rpm suction pipe pressure 68.00 kPa relative load 0.00 % matching throttle valve model (factor) 1.00 - 2A2B: 2A2B Fuel mixture control Error will cause a warning light Error is currently present Test conditions have been completed Short circuit or signal interruption Freeze Frame Information Event 1Odometer 54640kms 33951miles speed 1,344.00 rpm suction pipe pressure 50.00 kPa relative load 0.00 % matching throttle valve model (factor) 1.00 - 29CF: 29CF Misfirings, cylinder 3 Error will cause a warning light Error is currently present Test conditions have been completed Timeout Freeze Frame Information Event 1Odometer 54640kms 33951miles Engine temperature 102.00 °C load value for misfire detection 15.63 % Engine speed 832.00 rpm Lambda integrator group 1 33.59 % Event 2Odometer 54648kms 33956miles Engine temperature 101.25 °C load value for misfire detection 12.50 % Engine speed 768.00 rpm Lambda integrator group 1 33.59 % Event 3Odometer 54648kms 33956miles Engine temperature 103.50 °C load value for misfire detection 14.45 % Engine speed 864.00 rpm Lambda integrator group 1 33.59 % 29D0: 29D0 Misfirings, cylinder 4 Error will cause a warning light Error is not currently present Test conditions have been completed Timeout Freeze Frame Information Event 1Odometer 54640kms 33951miles Engine temperature 102.00 °C load value for misfire detection 15.63 % Engine speed 832.00 rpm Lambda integrator group 2 33.59 % Event 2Odometer 54648kms 33956miles Engine temperature 101.25 °C load value for misfire detection 12.50 % Engine speed 768.00 rpm Lambda integrator group 2 33.59 % 29CC: 29CC Misfirings, several cylinders Error will cause a warning light Error is currently present Test conditions have been completed Short circuit or signal interruption Freeze Frame Information Event 1Odometer 54640kms 33951miles ambient temperature 30.75 °C rail pressure 48,906.64 hPa voltage Kl. 87 13.71 V counter recognition bad road 0.00 - Event 2Odometer 54648kms 33956miles ambient temperature 29.25 °C rail pressure 48,906.64 hPa voltage Kl. 87 13.20 V counter recognition bad road 0.00 - Event 3Odometer 54648kms 33956miles ambient temperature 29.25 °C rail pressure 48,906.64 hPa voltage Kl. 87 13.91 V counter recognition bad road 0.00 - 29CD: 29CD Misfirings, cylinder 1 Error will cause a warning light Error is currently present Test conditions have been completed Short circuit or signal interruption Freeze Frame Information Event 1Odometer 54648kms 33956miles Engine temperature 103.50 °C load value for misfire detection 15.63 % Engine speed 800.00 rpm Lambda integrator group 1 33.59 % 29CE: 29CE Misfirings, cylinder 2 Error will cause a warning light Error is currently present Test conditions have been completed Short circuit or signal interruption Freeze Frame Information Event 1Odometer 54648kms 33956miles Engine temperature 103.50 °C load value for misfire detection 15.63 % Engine speed 800.00 rpm Lambda integrator group 1 33.59 %
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05-28-2010, 01:03 PM	#29
watever617 Private First Class 17 Rep 161 Posts Drives: bicycle Join Date: Sep 2009 Location: U S of A iTrader: (1)	Dealer change all my injectors, spark plugs, fuel pump and updated software. Doesnt misfire anymore at operating temps during idle. Glad it was nothing major as I went WOT one nite and it peaked over 22PSI!! thought i blew/burnt a cyclinder or something.
	Appreciate 0 Quote