Misfire question... Please help - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)

510135 · 08-11-2012, 11:06 PM

Hello I have already tried the search function and can't find what I'm after.
My car randomly throws a misfire code cylinder 6. Normally in 1st gear full throttle just after traction control starts to kick in, then again today on kick down at 60mph 3rd gear I think.

Any help would be great,

ReyT · 08-11-2012, 11:14 PM

Hows the log? try doing some runs on map 5 while logging and attempting to replicate the misfire.

510135 · 08-11-2012, 11:20 PM

Quote:

Originally Posted by ReyT

Hows the log? try doing some runs on map 5 while logging and attempting to replicate the misfire.

Haven't done a log (my car is stock)

it's really strange because everything has been changed that could potentially be causing it, and it's always cylinder 6.
HPFP was done recently as well.

510135 · 08-12-2012, 01:53 AM

I have been doing some reading and found that vanos can play a part in misfire amongst other things. I have not thrown a vanos code but others have cleaned and swapped solenoids and misfires have gone (even without code thrown). Thoughts?

tedM1 · 08-12-2012, 02:53 AM

I think its actually your Blow off valves. Map 5. pushes the boost pass their holding level. and leaks badly. do you have upgraded Blow off valves?

510135 · 08-12-2012, 03:12 AM

Quote:

Originally Posted by tedM1

I think its actually your Blow off valves. Map 5. pushes the boost pass their holding level. and leaks badly. do you have upgraded Blow off valves?

No just stock , thanks for the reply will look into it.

510135 · 08-12-2012, 05:29 PM

Bump. Anybody else
Thanks

ErvGotti · 08-12-2012, 05:38 PM

Could also be carbon build up, I've seen a couple of threads since I've been on these forums about carbon build up causing misfire's. Since you've changed out your plugs, coils, and injectors I'd give that a shot.

1Fasst1 · 08-12-2012, 10:50 PM

As you have already changed the items that useally cause missfires,I think the next step should be to rule out any issues or problems with your tune. Maybe you could find a friend or someone that would switch with you for a day or so and see if the problem is still there.I may be wrong on this ,but with the diverter valves you just would not hold boost. Not sure if that would cause a missfire on the same cylinder. Even new could be a bad plug or coil. Good luck with your problem.

08-11-2012, 11:06 PM	#1
510135 Captain Drives: 2009 BLK 135i Join Date: Jan 2012 Location: Earth Posts: 699 iTrader: (0)	Misfire question... Please help Hello I have already tried the search function and can't find what I'm after. My car randomly throws a misfire code cylinder 6. Normally in 1st gear full throttle just after traction control starts to kick in, then again today on kick down at 60mph 3rd gear I think. Any help would be great, Last edited by 510135; 12-03-2012 at 12:37 AM.
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08-12-2012, 02:53 AM	#5
tedM1 Private Drives: BMW 135i M sport Join Date: May 2012 Location: Champions Gate, Florida Posts: 50 iTrader: (0)	I think its actually your Blow off valves. Map 5. pushes the boost pass their holding level. and leaks badly. do you have upgraded Blow off valves? __________________ ETS FMIC - Riss Oil Catch Can - E92 Front Sway Bar - AFE dual scoops - DCI - TurboSmart dual port BOV's - AR design down pipes (catted) - N55 mid - Remus quad race exhaust. COBB Stage 2+fmic. V4. PRotune

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08-11-2012, 11:14 PM	#2
ReyT Second Lieutenant Drives: BMW Join Date: Aug 2012 Location: Aus Posts: 250 iTrader: (0)	Hows the log? try doing some runs on map 5 while logging and attempting to replicate the misfire.

08-12-2012, 01:53 AM	#4
510135 Captain Drives: 2009 BLK 135i Join Date: Jan 2012 Location: Earth Posts: 699 iTrader: (0)	I have been doing some reading and found that vanos can play a part in misfire amongst other things. I have not thrown a vanos code but others have cleaned and swapped solenoids and misfires have gone (even without code thrown). Thoughts?

08-12-2012, 05:29 PM	#7
510135 Captain Drives: 2009 BLK 135i Join Date: Jan 2012 Location: Earth Posts: 699 iTrader: (0)	Bump. Anybody else Thanks

08-12-2012, 05:38 PM	#8
ErvGotti Major Drives: 2008 135i 6MT Join Date: Jul 2010 Location: Ohio Posts: 1,089 iTrader: (5) Garage List 2008 135i [3.00]	Could also be carbon build up, I've seen a couple of threads since I've been on these forums about carbon build up causing misfire's. Since you've changed out your plugs, coils, and injectors I'd give that a shot.

08-12-2012, 10:50 PM	#9
1Fasst1 Second Lieutenant Drives: 09 135i, Jet Black 6MT Join Date: Jul 2011 Location: North Carolina Posts: 213 iTrader: (0)	As you have already changed the items that useally cause missfires,I think the next step should be to rule out any issues or problems with your tune. Maybe you could find a friend or someone that would switch with you for a day or so and see if the problem is still there.I may be wrong on this ,but with the diverter valves you just would not hold boost. Not sure if that would cause a missfire on the same cylinder. Even new could be a bad plug or coil. Good luck with your problem.