Misfire after remap

huesey1974 · 09-20-2015, 02:30 AM

Hi,
Had my 2007 335i remapped on Friday and all was well, However yesterday when I hit 4000rpm the car started misfiring and is running like a pig, Check engine light came on and my code reader is calling a code for multiple misfires, The tuner told me to change the plugs and gap them to 0.6mm. The recommended plug comes with a 0.7mm gap and im not sure if you can adjust them. Anyone else had this issue?
Thanks

hondarayblue · 09-20-2015, 06:36 AM

Like I said on the other forum; take it back and let them fix it free of charge of course.

Boland01 · 09-20-2015, 09:14 AM

Any DME performance enhancement you do such as a JB4 or Cobb has the potential to expose any weaknesses your car already has such as the spark plugs, coils or HPFP pretty quickly. As hondaray blue writes have the codes read and or run some logs and post it on the other forum.

Rob335i · 09-20-2015, 02:22 PM

Having the same problem with mhd stage 1 flash misfire on cylinder 3 I reflashed back to stock now it's fine

huesey1974 · 09-21-2015, 12:23 PM

Hi,
Just to let you know I changed the plugs and the old ones were terrible, Looked through my full BMW history and they have never been changed even though they are only good for about 40K and the car is at 56K now. Anyway the car pulls like a train now!!
Thanks

hondarayblue · 09-21-2015, 12:33 PM

Glad you got it sorted.

09-20-2015, 02:30 AM	#1
huesey1974 Private First Class 50 Rep 132 Posts Drives: 2013 M5 competition Join Date: Apr 2015 Location: Glasgow iTrader: (0)	Misfire after remap Hi, Had my 2007 335i remapped on Friday and all was well, However yesterday when I hit 4000rpm the car started misfiring and is running like a pig, Check engine light came on and my code reader is calling a code for multiple misfires, The tuner told me to change the plugs and gap them to 0.6mm. The recommended plug comes with a 0.7mm gap and im not sure if you can adjust them. Anyone else had this issue? Thanks
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09-20-2015, 06:36 AM	#2
hondarayblue Private 3 Rep 60 Posts Drives: E90 330i M Sport Join Date: Sep 2015 Location: Greenford, England iTrader: (0)	Like I said on the other forum; take it back and let them fix it free of charge of course.
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09-20-2015, 09:14 AM	#3
Boland01 Lieutenant 149 Rep 460 Posts Drives: 2010 535ix, 2008, 2007 335i Join Date: Sep 2013 Location: Magnolia, TX iTrader: (0)	Any DME performance enhancement you do such as a JB4 or Cobb has the potential to expose any weaknesses your car already has such as the spark plugs, coils or HPFP pretty quickly. As hondaray blue writes have the codes read and or run some logs and post it on the other forum.
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09-20-2015, 02:22 PM	#4
Rob335i Enlisted Member 2 Rep 22 Posts Drives: 06 335i Join Date: Sep 2015 Location: Perth scotland iTrader: (0)	Having the same problem with mhd stage 1 flash misfire on cylinder 3 I reflashed back to stock now it's fine
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09-21-2015, 12:23 PM	#5
huesey1974 Private First Class 50 Rep 132 Posts Drives: 2013 M5 competition Join Date: Apr 2015 Location: Glasgow iTrader: (0)	Hi, Just to let you know I changed the plugs and the old ones were terrible, Looked through my full BMW history and they have never been changed even though they are only good for about 40K and the car is at 56K now. Anyway the car pulls like a train now!! Thanks
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09-21-2015, 12:33 PM	#6
hondarayblue Private 3 Rep 60 Posts Drives: E90 330i M Sport Join Date: Sep 2015 Location: Greenford, England iTrader: (0)	Glad you got it sorted.
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