Misfire after hard acceleration
01-22-2018, 02:15 PM
#11
New Members
Thread Starter
Join Date: Mar 2016
Location: mi
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 520xi
If you are quite certain you have eliminated all possibility that it is not due to coil/plug/injector then
1) It is still something specific to that cylinder, such as
DME circuits that drive that coil/plug?
coil pack wires
valves
cylinder
??
2) Or it is not just specific to cyl 6 but seems like it is because it is the one that keeps misfiring first.
I would get it out on the road and force the misfire numerous times to try and determine if it is indeed always and only a cyl 6 problem.
1) It is still something specific to that cylinder, such as
DME circuits that drive that coil/plug?
coil pack wires
valves
cylinder
??
I would get it out on the road and force the misfire numerous times to try and determine if it is indeed always and only a cyl 6 problem.
01-22-2018, 02:40 PM
#12
Super Moderator
Join Date: Jul 2011
Location: Augusta, GA
Posts: 3,599
Likes: 0
Received 311 Likes
on
298 Posts
My Ride: 05 530i M54
Model Year: 05 530i
Engine: 3.0 M54
Ok your problem seems to be the injector/seal, decoupling clip or 02 sensor. May I ask what brand injector/type you used? Also if you replaced all injectors did you try to use an old good injector on cyl 6? I am sure all did not go bad.
Make sure the clip on the injector is install correctly or installed at all and check seal. After check your 02 sensors pre-cat bank 2 it could very well give you a misfire. If your engine is running rough after this then check for a vacuum leak.
You should find your issue with the troubleshooting steps i gave and correcting what is found. I put them in this order due to the problem being only at 6 cyl. Let us know what you come up with.
Make sure the clip on the injector is install correctly or installed at all and check seal. After check your 02 sensors pre-cat bank 2 it could very well give you a misfire. If your engine is running rough after this then check for a vacuum leak.
You should find your issue with the troubleshooting steps i gave and correcting what is found. I put them in this order due to the problem being only at 6 cyl. Let us know what you come up with.
Last edited by seanjordan20; 01-22-2018 at 02:43 PM.
01-22-2018, 03:09 PM
#13
New Members
Thread Starter
Join Date: Mar 2016
Location: mi
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 520xi
Ok your problem seems to be the injector/seal, decoupling clip or 02 sensor. May I ask what brand injector/type you used? Also if you replaced all injectors did you try to use an old good injector on cyl 6? I am sure all did not go bad.
Make sure the clip on the injector is install correctly or installed at all and check seal. After check your 02 sensors pre-cat bank 2 it could very well give you a misfire. If your engine is running rough after this then check for a vacuum leak.
You should find your issue with the troubleshooting steps i gave and correcting what is found. I put them in this order due to the problem being only at 6 cyl. Let us know what you come up with.
Make sure the clip on the injector is install correctly or installed at all and check seal. After check your 02 sensors pre-cat bank 2 it could very well give you a misfire. If your engine is running rough after this then check for a vacuum leak.
You should find your issue with the troubleshooting steps i gave and correcting what is found. I put them in this order due to the problem being only at 6 cyl. Let us know what you come up with.
Last edited by skeester; 01-22-2018 at 03:11 PM.
01-22-2018, 06:55 PM
#14
Super Moderator
Join Date: Jul 2011
Location: Augusta, GA
Posts: 3,599
Likes: 0
Received 311 Likes
on
298 Posts
My Ride: 05 530i M54
Model Year: 05 530i
Engine: 3.0 M54
Ok. Seems you have done quite a bit to figure this issue out. What i listed should be the only things that give you a misfire. Have you tried swapping injectors 5 and 6. I don't know if you did the injectors yourself to know how to program them but I would give that a try. Maybe the 6 is a bad reman. It doesn't make since for it to start in 2nd and 3rd if something is actually wrong. It would happen all the time. You can't have a mosfet issue (wrong model for that). Have you done a test on you O2's. I can't see anything else giving you the issue other than a DME software problem.
01-23-2018, 05:01 AM
#15
Senior Members
Join Date: Oct 2009
Location: Indiana, USA
Posts: 1,380
Likes: 0
Received 3 Likes
on
3 Posts
My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
01-25-2018, 04:21 AM
#16
New Members
Thread Starter
Join Date: Mar 2016
Location: mi
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 520xi
01-25-2018, 07:50 PM
#18
Senior Members
Join Date: Oct 2009
Location: Indiana, USA
Posts: 1,380
Likes: 0
Received 3 Likes
on
3 Posts
My Ride: 2007 530xi: Sport, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, HD Radio, SAT, Custom NCS coded options 2008 535xi: Sport, Night Vision, NAV, PDC, HUD, Cold Wthr, CA, Logic 7, SAT, Custom NCS coded options, Rear Seat Heat Retrofit, Passport 9500ci
Model Year: 2008
Engine: N54
01-26-2018, 10:26 AM
#19
New Members
Thread Starter
Join Date: Mar 2016
Location: mi
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 520xi
No. Was very odd that I could move coils around and the misfire stayed with cyl 6. Picked up a set of coils from eBay for $50 so they were cheap enough.
Thread
Thread Starter
Forum
Replies
Last Post
pavrom
E60, E61 Parts, Accessories and Mods
1
04-21-2014 02:35 PM
skhalifeh
E60 Discussion
14
10-16-2013 02:57 PM