Misfires

SmAcKs · 05-20-2013, 06:48 PM

I had a jb4 and DCI I WOT from about 30mph to 70mph and I got 2 misfire codes in cylinder 2 and 3 and my car went into limp mode with the service engine light on, but when I turned the car off it was back to normal...

So I took the mods out and took it to the dealership and all they did was change the battery they said it was really really weak it actually died when I dropped it off. I got my car back and I gased it around 30 mph and got no misfire codes.. However I'm afraid to put the tune back in due to misfire's and going into limp mode..

Do you think the change of the battery fix'd my problem and the tune won't misfire anymore?

luv135i · 05-20-2013, 06:54 PM

Change your plugs and see. Thats typically the cause of missfires. How many miles on those?

SmAcKs · 05-20-2013, 08:14 PM

Quote:

Originally Posted by luv135i

Change your plugs and see. Thats typically the cause of missfires. How many miles on those?

About 79k

marv85 · 05-20-2013, 08:15 PM

79k on original plugs lol??

Change your plugs regardless of whether they are the issue.

next check coils!

luv135i · 05-21-2013, 10:46 AM

yup change them for sure. if it still persists, swap the coilpacks and see if the misfires follow the coilpacks. If it does youve found your problem.

05-20-2013, 06:48 PM	#1
SmAcKs Private First Class 9 Rep 96 Posts Drives: BMW 335i BLACK Join Date: Apr 2013 Location: Castaic, California iTrader: (1)	Misfires I had a jb4 and DCI I WOT from about 30mph to 70mph and I got 2 misfire codes in cylinder 2 and 3 and my car went into limp mode with the service engine light on, but when I turned the car off it was back to normal... So I took the mods out and took it to the dealership and all they did was change the battery they said it was really really weak it actually died when I dropped it off. I got my car back and I gased it around 30 mph and got no misfire codes.. However I'm afraid to put the tune back in due to misfire's and going into limp mode.. Do you think the change of the battery fix'd my problem and the tune won't misfire anymore?
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05-20-2013, 06:54 PM	#2
luv135i Major 60 Rep 1,073 Posts Drives: White Join Date: Nov 2009 Location: GA iTrader: (0)	Change your plugs and see. Thats typically the cause of missfires. How many miles on those?
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05-20-2013, 08:15 PM	#4
marv85 Colonel 71 Rep 2,626 Posts Drives: '07 E92 335i MT Join Date: Jun 2010 Location: Bay Area iTrader: (7)	79k on original plugs lol?? Change your plugs regardless of whether they are the issue. next check coils! __________________ '18 F80 M3 Comp 6MT - Stock '07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar. '05 C55 AMG SOLD - '22 Tesla M3P \| '10 E92 335i M, 6MT \| '07 E90 335i, PTF COBB E50, FBO, HFS4
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05-21-2013, 10:46 AM	#5
luv135i Major 60 Rep 1,073 Posts Drives: White Join Date: Nov 2009 Location: GA iTrader: (0)	yup change them for sure. if it still persists, swap the coilpacks and see if the misfires follow the coilpacks. If it does youve found your problem.
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