Misfire reoccur??

Chrisred · 05-13-2012, 05:27 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, 05:44 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, 06:37 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, 07:24 PM

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

Eracer76 · 05-13-2012, 07:35 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, 07:38 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, 04:11 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, 05:27 PM	#1
Chrisred Captain 21 Rep 741 Posts Drives: BMW 335xi coupe Join Date: Jan 2010 Location: Montreal, Canada 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, 06:37 PM	#3
GeorgiaTech335coupe Lieutenant Colonel 33 Rep 1,882 Posts Drives: Black BMW 335i coupe Join Date: Mar 2007 Location: USA 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, 07:24 PM	#4
Chrisred Captain 21 Rep 741 Posts Drives: BMW 335xi coupe Join Date: Jan 2010 Location: Montreal, Canada 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, 07:35 PM	#5
Eracer76 First Lieutenant 19 Rep 328 Posts Drives: 2009 E89 Z4 35i Join Date: Nov 2011 Location: IL 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! __________________ 2009 Z4 35i 6mt, Spec 3+ clutch, Mfactory SMFW, MHD 100% E85 Wedge tune, Fuel-it TBI w/Bluetooth ethanol sensor, AR downpipes, Custom turbo Inlets, MMP outlets, BT intercooler, Stett Chargepipe, Tial BOV, H&R coils, 19" 2-piece wheels, Potenza RE-11 tires 235 & 275/19's Sold>2008 E92 335xi FBO+ ran 11.988@114.080 MPH
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05-14-2012, 04:11 PM	#7
Chrisred Captain 21 Rep 741 Posts Drives: BMW 335xi coupe Join Date: Jan 2010 Location: Montreal, Canada 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
	Appreciate 0 Quote

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