|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Search | Today's Posts | Mark Forums Read |
|
BMW 3-Series (E90 E92) Forum
>
misfiring in cylinder 5 w/ cobb
|
|
03-06-2013, 08:50 AM | #1 |
Second Lieutenant
17
Rep 223
Posts |
misfiring in cylinder 5 w/ cobb
So last summer I had a misfiring issue in cylinder 5 when running cobb stage 2 I think v401 and I changed the spark plug and everything was working fine and now that summer is right around the corner I figured I would load the tune on for some fun and it started misfiring in cylinder 5 again.
Do you guys think this is a fuel injector issue as opposed to a spark plug issue? The new spark plugs have around 12k miles on them now. I am going to data log tonight, since I live in the city and it just snowed here there are only a few places I can do a 2nd-3rd gear pull on with out running into some traffic. Thanks,
__________________
2008 BMW 335i e92-Agency Power DP's, Cobb stage 2, BMS DCI, BMW Performance Wheels
-Previously Owned- 2005 Volvo S60R (SOLD)-3.5" downpipe, 3" straight pipe all the way out, IPD custom tune, IPD Intake, AEM Methanol Injection Kit, Bell Intercooler, custom 4-guage piller pod.....best 1/4: 12.9 @ 111 |
03-06-2013, 08:57 AM | #3 | |
Second Lieutenant
17
Rep 223
Posts |
Quote:
If you know, how much is a new BMW Coil? Also, i know i have to remove my engine cover and some other stuff to get to the coil but do i have to put that all on again before driving or is it safe to drive with out all that stuff on?
__________________
2008 BMW 335i e92-Agency Power DP's, Cobb stage 2, BMS DCI, BMW Performance Wheels
-Previously Owned- 2005 Volvo S60R (SOLD)-3.5" downpipe, 3" straight pipe all the way out, IPD custom tune, IPD Intake, AEM Methanol Injection Kit, Bell Intercooler, custom 4-guage piller pod.....best 1/4: 12.9 @ 111 |
|
Appreciate
0
|
03-06-2013, 09:04 AM | #4 | |
Brigadier General
562
Rep 3,625
Posts |
Quote:
|
|
Appreciate
0
|
03-06-2013, 09:05 AM | #5 |
Second Lieutenant
9
Rep 270
Posts |
ECS tuning is about $50 ea as well
|
Appreciate
0
|
03-06-2013, 09:14 AM | #6 | |
Second Lieutenant
17
Rep 223
Posts |
Quote:
I think it would be safe to assume that if the misfire continues in cylinder 5 then it has to be the injector because the spark plug is relatively new.
__________________
2008 BMW 335i e92-Agency Power DP's, Cobb stage 2, BMS DCI, BMW Performance Wheels
-Previously Owned- 2005 Volvo S60R (SOLD)-3.5" downpipe, 3" straight pipe all the way out, IPD custom tune, IPD Intake, AEM Methanol Injection Kit, Bell Intercooler, custom 4-guage piller pod.....best 1/4: 12.9 @ 111 |
|
Appreciate
0
|
03-06-2013, 09:27 AM | #7 |
Captain
58
Rep 913
Posts |
If the coil isn't the issue, I suppose you could swap plugs as well just to rule them out...
|
Appreciate
0
|
03-06-2013, 12:47 PM | #8 |
3441
Rep 79,212
Posts
Drives: C6 Z06, 09 335i, 10 335xi
Join Date: Dec 2008
Location: www.TopGearSolutions.com
|
You could also check the gap on the plug. Stock gapping is .04 if I recall correctly.
Over-time that gap increases which causes the misfiring more times then not. |
Appreciate
0
|
03-06-2013, 01:48 PM | #10 |
Second Lieutenant
17
Rep 223
Posts |
I want to say they have around 8k-10k miles on them maybe less.
What is odd is when I changed the spark plug last summer the car ran fine afterwards and the misfire keeps happening in cylinder 5, none of the others have this issue. So knowing that, I would say if its not the coil pack (which I will find out tonight if it is) then it has to be the fuel injector, right? Regards,
__________________
2008 BMW 335i e92-Agency Power DP's, Cobb stage 2, BMS DCI, BMW Performance Wheels
-Previously Owned- 2005 Volvo S60R (SOLD)-3.5" downpipe, 3" straight pipe all the way out, IPD custom tune, IPD Intake, AEM Methanol Injection Kit, Bell Intercooler, custom 4-guage piller pod.....best 1/4: 12.9 @ 111 |
Appreciate
0
|
03-06-2013, 09:38 PM | #11 |
Second Lieutenant
18
Rep 270
Posts |
I had the same symptoms last year and turned out to be the coil. If you have high mileage you may want to swap them all as preventive maintenance. Or you could just keep a couple extras in your garage for when they do fail. Tick tock.
|
Appreciate
0
|
03-06-2013, 11:08 PM | #12 |
Mad Linux Guru On The Loose
1112
Rep 5,391
Posts
Drives: 2008 335i Sedan, 2023 M3
Join Date: Aug 2009
Location: Chicago, IL
|
I don't think mileage has anything to do with it. Its about heat cycles. I have barely 33K miles on my 2008 335i and I've just replaced my first coil.
I've also replaced 2 injectors, but they were old part numbers...
__________________
6MT | COBB | AR | AE | Forge DV | HPF | P3 Gauge | Hybrid Intake | O.S.Giken TCD | All M3 bits | TCKLine | StopTech | UUC | ER | SPEC
|
Appreciate
0
|
03-06-2013, 11:37 PM | #13 | |
Banned
28
Rep 457
Posts |
Quote:
|
|
Appreciate
0
|
03-07-2013, 01:17 PM | #14 |
Second Lieutenant
17
Rep 223
Posts |
My car only has 33k miles on it, I changed the potentially bad coil to another cylinder. Tonight I will find out if it a bad coil or not.
Thanks for all the help. Regards,
__________________
2008 BMW 335i e92-Agency Power DP's, Cobb stage 2, BMS DCI, BMW Performance Wheels
-Previously Owned- 2005 Volvo S60R (SOLD)-3.5" downpipe, 3" straight pipe all the way out, IPD custom tune, IPD Intake, AEM Methanol Injection Kit, Bell Intercooler, custom 4-guage piller pod.....best 1/4: 12.9 @ 111 |
Appreciate
0
|
03-07-2013, 01:40 PM | #15 |
Major General
81
Rep 6,092
Posts |
i just replaced the coil in cylinder #5 for my car this past weekend too. :/
__________________
|
Appreciate
0
|
03-07-2013, 05:38 PM | #16 |
Second Lieutenant
18
Rep 270
Posts |
|
Appreciate
0
|
03-08-2013, 08:13 AM | #17 |
Second Lieutenant
17
Rep 223
Posts |
Turns out it was a bad coil in cylinder 5.
__________________
2008 BMW 335i e92-Agency Power DP's, Cobb stage 2, BMS DCI, BMW Performance Wheels
-Previously Owned- 2005 Volvo S60R (SOLD)-3.5" downpipe, 3" straight pipe all the way out, IPD custom tune, IPD Intake, AEM Methanol Injection Kit, Bell Intercooler, custom 4-guage piller pod.....best 1/4: 12.9 @ 111 |
Appreciate
0
|
03-08-2013, 08:14 AM | #18 | ||
Second Lieutenant
17
Rep 223
Posts |
Quote:
Quote:
Thanks for all the help guys!
__________________
2008 BMW 335i e92-Agency Power DP's, Cobb stage 2, BMS DCI, BMW Performance Wheels
-Previously Owned- 2005 Volvo S60R (SOLD)-3.5" downpipe, 3" straight pipe all the way out, IPD custom tune, IPD Intake, AEM Methanol Injection Kit, Bell Intercooler, custom 4-guage piller pod.....best 1/4: 12.9 @ 111 |
||
Appreciate
0
|
Bookmarks |
Thread Tools | Search this Thread |
|
|