E90Post
 


N54Tuning.com
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > USA - Northwest > E90:misfiring after replacing spark plug and coil pack (misfiring cylinder)



Reply
 
Thread Tools Search this Thread
      03-04-2013, 07:26 PM   #1
vicjrmndz
Registered
3
Rep
3
Posts

 
Drives: 328i
Join Date: Mar 2012
Location: seattle

iTrader: (0)

E90:misfiring after replacing spark plug and coil pack (misfiring cylinder)

hi guys,
so my 2007 328i started shaking/choking (misfiring i guess) when i come to a stop or just parked in general. I've done a diagnostic check and it said cylinder 6 misfiring.
so i've replaced the coil pack and the spark plug but yet my car is still acting like its misfiring.
if anyone knows what else could the issue be please let me know.

thanks in advance.
Appreciate 0
      03-11-2013, 09:58 PM   #2
Jaron Bell
First Lieutenant
Jaron Bell's Avatar
United_States
8
Rep
329
Posts

 
Drives: 10 M3, 09 335i, 08 Audi RS4
Join Date: Oct 2011
Location: Silverdale, WA

iTrader: (2)

Quote:
Originally Posted by vicjrmndz View Post
hi guys,
so my 2007 328i started shaking/choking (misfiring i guess) when i come to a stop or just parked in general. I've done a diagnostic check and it said cylinder 6 misfiring.
so i've replaced the coil pack and the spark plug but yet my car is still acting like its misfiring.
if anyone knows what else could the issue be please let me know.

thanks in advance.
You may need a carbon blast. My 335 was doing that, it cost 2k. Luckily, I was still under my maintenance plan. It could also be dirty injectors, fuel filter, fuel regulator, or even a bad injector. I recommend using Techron adjective when you fill up next time for a couple of tanks to see if you burn some of the carbons out. It may help. If the fuel injector is bad, the I recommend replacing all 6 injectors, fuel filter and regulator. My RS4 had this problem with the injectors. I had to replace everything and get a carbon blast.
__________________
G-Power/Hamann BMW M3, G-Power Supercharger SKII Club Sport, Eisenmann Race w/Challenge Race X-Pipe, Project Kicks Nero Chrome Lug Nuts, Hamann Body Kit, KW V3, Vorschlag Camber Plates, ARKYM Wheels, Escort Radar and Laser Jammers 9500ci
Appreciate 0
      03-11-2013, 11:27 PM   #3
Wedge1967
Banned
United_States
25
Rep
2,172
Posts

 
Drives: '07 e92 AT Sport Montego Blue
Join Date: Sep 2011
Location: Portland, OR

iTrader: (3)

Quote:
Originally Posted by vicjrmndz View Post
hi guys,
so my 2007 328i started shaking/choking (misfiring i guess) when i come to a stop or just parked in general. I've done a diagnostic check and it said cylinder 6 misfiring.
so i've replaced the coil pack and the spark plug but yet my car is still acting like its misfiring.
if anyone knows what else could the issue be please let me know.

thanks in advance.
Cyl 6 could be caused by a lot of things. 99% of the time it's not the plug or coil pack. When that happens it shuts down the back fuel rail bank and runs on three cylinders. When you shut down the car and restart it, it should run fine. Correct? What were you doing when it coded? Was the car up to temp? Could also be a cam sensor going bad. On the ST MT cars with DMFW, at 6500 rpm the vibration from the DMFW was causing a Cyl 6 misfire. But it's not really a misfire. So like I said, it could be a number of things.
Appreciate 0
      03-11-2013, 11:49 PM   #4
andybui82
Colonel
andybui82's Avatar
United_States
42
Rep
2,474
Posts

 
Drives: 335d
Join Date: Oct 2011
Location: Blop PNW branch

iTrader: (4)

Quote:
Originally Posted by Jaron Bell View Post
You may need a carbon blast. My 335 was doing that, it cost 2k. Luckily, I was still under my maintenance plan. It could also be dirty injectors, fuel filter, fuel regulator, or even a bad injector. I recommend using Techron adjective when you fill up next time for a couple of tanks to see if you burn some of the carbons out. It may help. If the fuel injector is bad, the I recommend replacing all 6 injectors, fuel filter and regulator. My RS4 had this problem with the injectors. I had to replace everything and get a carbon blast.
328 dont need valve cleaning i dont think. its most likely a fuel injector?
__________________
Cars: SGM 325i (Retired) l BSM 135i (Retired) l SS to Gloss White S2000 (Retired) l Arctic White RS4 (Retired) l White GTi (retired) l AW 335d M-Sport
Appreciate 0
      03-12-2013, 11:32 AM   #5
hookandpull
Lieutenant
6
Rep
574
Posts

 
Drives: 2008 335i Sedan
Join Date: Dec 2012
Location: Seattle WA

iTrader: (2)

Quote:
Originally Posted by Jaron Bell

You may need a carbon blast. My 335 was doing that, it cost 2k. Luckily, I was still under my maintenance plan. It could also be dirty injectors, fuel filter, fuel regulator, or even a bad injector. I recommend using Techron adjective when you fill up next time for a couple of tanks to see if you burn some of the carbons out. It may help. If the fuel injector is bad, the I recommend replacing all 6 injectors, fuel filter and regulator. My RS4 had this problem with the injectors. I had to replace everything and get a carbon blast.
Carbon build up on the intake valves wouldn't make the car barely run
__________________
19" DPE GT7's, BMS DCI, AA 3" catless downpipes, AE catless catback, JB4 G5, ETS 7" FMIC, AR Charpipe with dual -10 meth injector bungs, HFS4 Aquamist meth kit, Alpina TCU flash, M3 pedals, LED interior kit...
Appreciate 0
      03-12-2013, 11:36 AM   #6
hookandpull
Lieutenant
6
Rep
574
Posts

 
Drives: 2008 335i Sedan
Join Date: Dec 2012
Location: Seattle WA

iTrader: (2)

What code did you get?
__________________
19" DPE GT7's, BMS DCI, AA 3" catless downpipes, AE catless catback, JB4 G5, ETS 7" FMIC, AR Charpipe with dual -10 meth injector bungs, HFS4 Aquamist meth kit, Alpina TCU flash, M3 pedals, LED interior kit...
Appreciate 0
      03-20-2013, 07:40 PM   #7
dhc905
Private
United_States
0
Rep
73
Posts

 
Drives: 2006 325i
Join Date: Jul 2012
Location: East Bay, SF

iTrader: (4)

I followed the instructions for changing the sparkplugs but since I didn't know when the last time they were changed was, I simply pulled two of them out, looked at them and then put them back in.

Now my car has a funny feeling when crawling along (sort of like a gear change, perhaps the sudden loss of power) and then when I was driving up a hill the service engine soon light came on and the car shook (not violently, but noticeably more than typical) and it seemed like I was running in half power.

The only other piece of useful info in this story is that when I pulled the coil out of one of the cylinder banks the very tip of the rubber part came off (about 1/2") which mean that the rubber part only covered the metallic inner part of the coil, not the extra 1/2" that mates with the plug. Think this is a problem? Should I have glued the rubber back onto the coil?

PLEASE HELP! I'm driving down to LA tomorrow (350 miles) and really don't want to kill my car en route.
Appreciate 0
      03-20-2013, 07:50 PM   #8
hookandpull
Lieutenant
6
Rep
574
Posts

 
Drives: 2008 335i Sedan
Join Date: Dec 2012
Location: Seattle WA

iTrader: (2)

Your coil could very well be shorting against your head instead of applying power to the plug. Glue the boot back together and see if that fixes it
__________________
19" DPE GT7's, BMS DCI, AA 3" catless downpipes, AE catless catback, JB4 G5, ETS 7" FMIC, AR Charpipe with dual -10 meth injector bungs, HFS4 Aquamist meth kit, Alpina TCU flash, M3 pedals, LED interior kit...
Appreciate 0
      04-01-2013, 03:23 PM   #9
dhc905
Private
United_States
0
Rep
73
Posts

 
Drives: 2006 325i
Join Date: Jul 2012
Location: East Bay, SF

iTrader: (4)

Genius. I glued it back together and fixed everything.

Thank you sir.

Quote:
Originally Posted by hookandpull View Post
Your coil could very well be shorting against your head instead of applying power to the plug. Glue the boot back together and see if that fixes it
Appreciate 0
      04-01-2013, 04:55 PM   #10
hookandpull
Lieutenant
6
Rep
574
Posts

 
Drives: 2008 335i Sedan
Join Date: Dec 2012
Location: Seattle WA

iTrader: (2)

Thats why Boeing pays me the small bucks
__________________
19" DPE GT7's, BMS DCI, AA 3" catless downpipes, AE catless catback, JB4 G5, ETS 7" FMIC, AR Charpipe with dual -10 meth injector bungs, HFS4 Aquamist meth kit, Alpina TCU flash, M3 pedals, LED interior kit...
Appreciate 0
      04-03-2013, 11:27 PM   #11
Jaron Bell
First Lieutenant
Jaron Bell's Avatar
United_States
8
Rep
329
Posts

 
Drives: 10 M3, 09 335i, 08 Audi RS4
Join Date: Oct 2011
Location: Silverdale, WA

iTrader: (2)

Quote:
Originally Posted by hookandpull View Post
Thats why Boeing pays me the small bucks
__________________
G-Power/Hamann BMW M3, G-Power Supercharger SKII Club Sport, Eisenmann Race w/Challenge Race X-Pipe, Project Kicks Nero Chrome Lug Nuts, Hamann Body Kit, KW V3, Vorschlag Camber Plates, ARKYM Wheels, Escort Radar and Laser Jammers 9500ci
Appreciate 0
      04-07-2013, 02:53 AM   #12
E90Dyno
Second Lieutenant
E90Dyno's Avatar
United_States
6
Rep
259
Posts

 
Drives: 2010 335i E90
Join Date: Aug 2012
Location: Renton Washinton

iTrader: (0)

I had the same issue two weeks ago and fixed it!Had all six injectors replaced. -_-
__________________
I have two turbos and an exhaust..
Appreciate 0
      04-07-2013, 11:53 AM   #13
hookandpull
Lieutenant
6
Rep
574
Posts

 
Drives: 2008 335i Sedan
Join Date: Dec 2012
Location: Seattle WA

iTrader: (2)

Quote:
Originally Posted by E90Dyno
I had the same issue two weeks ago and fixed it!Had all six injectors replaced. -_-
Sadly I'm due for injectors as well
__________________
19" DPE GT7's, BMS DCI, AA 3" catless downpipes, AE catless catback, JB4 G5, ETS 7" FMIC, AR Charpipe with dual -10 meth injector bungs, HFS4 Aquamist meth kit, Alpina TCU flash, M3 pedals, LED interior kit...
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 04:34 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST