Misfire reoccur??

Chrisred · 05-13-2012, 04:27 PM

Can a misfire reoccur on same cylinder if all spark plugs been replaced and that same injector and coil have also been replaced.

Changed cyl 2&3 coils and injectors like 8 months ago. Just reinstalled tune and now a misfire on cyl 3 plus loss of power on wot with increased boost. Also sounds like. Subaru with exhaust lol

skim7x · 05-13-2012, 04:44 PM

Quote:

Originally Posted by Chrisred

Can a misfire reoccur on same cylinder if all spark plugs been replaced and that same injector and coil have also been replaced.

Changed cyl 2&3 coils and injectors like 8 months ago. Just reinstalled tune and now a misfire on cyl 3 plus loss of power on wot with increased boost. Also sounds like. Subaru with exhaust lol

You might have to change spark plugs again... I had my plugs replaced by BMW and only about 12,000 miles later, I started getting misfires. Replaced spark plugs and misfires are completely gone. And the plug that was in the misfiring cylinder was visibly worn down more than the other spark plugs.

GeorgiaTech335coupe · 05-13-2012, 05:37 PM

Could be fuel pump too. But to answer your question, yes, it could be one of the same parts again. It sucks, but it could happen.

Chrisred · 05-13-2012, 06:24 PM

Could bad O2 sensors also cause this?? I also get random shaking while driving....

Eracer76 · 05-13-2012, 06:35 PM

Who installed the parts? Do you know for sure if the injectors were coded properly, or if the coupler rings were installed on the injectors? You'd be surprised how even BMW dealers miss those things. Because even a non coded injector with a missing coupler ring will still work ok for awhile, but throw a tune on it, and will go bad quickly... Dont ask me how I know... Let's just say now that my car is out of warranty, it's never going back to a dealer again!

Chrisred · 05-13-2012, 06:38 PM

Quote:

Originally Posted by Eracer76

Who installed the parts? Do you know for sure if the injectors were coded properly, or if the coupler rings were installed on the injectors? You'd be surprised how even BMW dealers miss those things. Because even a non coded injector with a missing coupler ring will still work ok for awhile, but throw a tune on it, and will go bad quickly... Dont ask me how I know... Let's just say now that my car is out of warranty, it's never going back to a dealer again!

BMW mech actually

Chrisred · 05-14-2012, 03:11 PM

Update. Did a couple pulls today on map 5. I got that reduced power feeling and CEL flashing. Codes are misfires on 4 5 6 cyl and on multiple cyl plus the obvious lambda codes. Yesterday the misfire was only on cyl 3. Weird.....

05-13-2012, 04:27 PM	#1
Chrisred Captain Drives: BMW 335xi coupe Join Date: Jan 2010 Location: Montreal, Canada Posts: 719 iTrader: (0)	Can a misfire reoccur on same cylinder if all spark plugs been replaced and that same injector and coil have also been replaced. Changed cyl 2&3 coils and injectors like 8 months ago. Just reinstalled tune and now a misfire on cyl 3 plus loss of power on wot with increased boost. Also sounds like. Subaru with exhaust lol __________________ JB4 cp-e IC AMS exhaust BMS DCI AR DP's METH 19" VMR VB3 Stoptech BBK TC KLINE VORSHLAG
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05-13-2012, 05:37 PM	#3
GeorgiaTech335coupe Lieutenant Colonel Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA Posts: 1,884 iTrader: (0)	Could be fuel pump too. But to answer your question, yes, it could be one of the same parts again. It sucks, but it could happen. __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(e90post.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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05-13-2012, 06:24 PM	#4
Chrisred Captain Drives: BMW 335xi coupe Join Date: Jan 2010 Location: Montreal, Canada Posts: 719 iTrader: (0)	Could bad O2 sensors also cause this?? I also get random shaking while driving.... __________________ JB4 cp-e IC AMS exhaust BMS DCI AR DP's METH 19" VMR VB3 Stoptech BBK TC KLINE VORSHLAG
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05-13-2012, 06:35 PM	#5
Eracer76 Second Lieutenant Drives: 2008 E92 335xi Join Date: Nov 2011 Location: IL Posts: 234 iTrader: (5)	Who installed the parts? Do you know for sure if the injectors were coded properly, or if the coupler rings were installed on the injectors? You'd be surprised how even BMW dealers miss those things. Because even a non coded injector with a missing coupler ring will still work ok for awhile, but throw a tune on it, and will go bad quickly... Dont ask me how I know... Let's just say now that my car is out of warranty, it's never going back to a dealer again! __________________ Click>> 2008 BMW 335xi E92: 11.988 @ 114.080 MPH BMS JB4 G5, WW meth kit, OCC ~ Stett CAI ~ Helix FMIC ~ ER Charge Pipe w/Tial BOV ~AR Catless DP~ Aero Front Lip ~ BMS LED Angel Eyes ~ Black Kidney Grills ~ Painted Lower Grills Painted Reflectors ~ Aluminum Pedals ~ 35% window tint ~ Painted Calipers/Rotors ~ KW V1 Coilovers ~ 19" Avant Garde M310's 235/35 & 275/30 G-Max AS-03 tires
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05-14-2012, 03:11 PM	#7
Chrisred Captain Drives: BMW 335xi coupe Join Date: Jan 2010 Location: Montreal, Canada Posts: 719 iTrader: (0)	Update. Did a couple pulls today on map 5. I got that reduced power feeling and CEL flashing. Codes are misfires on 4 5 6 cyl and on multiple cyl plus the obvious lambda codes. Yesterday the misfire was only on cyl 3. Weird..... __________________ JB4 cp-e IC AMS exhaust BMS DCI AR DP's METH 19" VMR VB3 Stoptech BBK TC KLINE VORSHLAG
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