misfire cylinder 2.. help me diagnose?

Phlonx · 04-18-2012, 08:59 PM

Hey guys,

The car: 08 135i coupe

The situation:

Had JB4 and DCI only for month or 2. Car has 35k miles, not yet had its big service. BMW just replaced Vanos solenoids due to a CEL (warranty) I had once at WOT in 4th gear on map 1. Directly after that, WOT in 3rd and all of a sudden at about 4k RPM SES came on and threw the car in limp mode. It now does it everytime I go WOT, but only on map 1, map 4 (stock) is just fine. After what felt like a misfire, SES light comes on and any throttle whatsoever makes the car stutter and shake terribly, it won't accelerate. Turn off and back on and everything is fine, no lights, it runs normally.

Found these codes today:

29CE Misfirings, cylinder 2
29D9 Misfirings in case of tank filling level too low

Any ideas?

brusk · 04-18-2012, 09:55 PM

Replace spark plugs. If that doesn't work swap coil packs with another cylinder to see if the problem follows the coil pack.

Houman21 · 04-18-2012, 11:54 PM

I had a similar issue with misfires/shake on my e92/N54. Dealership ended up changing the fuel pump and injectors as well as a SW update.

EFI Logics · 04-19-2012, 07:36 AM

It sounds like you are describing an ignition related issue. I would look into the spark plugs and coil packs first.

-Josh

Simon_135i · 04-19-2012, 10:14 AM

Spark plugs and/or coil packs first!

romak47 · 04-19-2012, 10:47 AM

when u guys change/swap the coil packs, do you have to get them coded or tuned by BMW?

BrokenVert · 04-19-2012, 11:04 AM

fun fact. When my injectors went it started with a misfire in cylinder 2

Muhahahahahahahaha

no thats a lie, it was 3, 4 & 5 that were the troublemakers. However, if it isnt plugs and coil packs the injectors should be your next thing on the list. Its an expensive fix (trust me on that one)

Have you had them checked under the recall yet?

Phlonx · 04-19-2012, 11:50 AM

Thanks guys!

Will check spark plugs then coil packs then injectors. I havn't taken it up with BMW yet because it only misfires w map 1. There are no problems they can replicate stock. Hopefully the spark plugs or coils take care of it so I can move on makin more powa!

BrokenVert · 04-19-2012, 11:52 AM

Quote:

Originally Posted by Phlonx

Thanks guys!

Will check spark plugs then coil packs then injectors. I havn't taken it up with BMW yet because it only misfires w map 1. There are no problems they can replicate stock. Hopefully the spark plugs or coils take care of it so I can move on makin more powa!

Just a thought. With a tune in the car its typically recommended that you half the replacement time on plugs.

Basically youre supposed to replace them every 20-25K miles because the extra stress from the tune consumes them faster.

So if your tune was installed last month and youve been rather aggressive on the throttle, its possible that its simply the last nail being put in your plugs coffin, as they should be changed every 45-50K miles anyway.

Phlonx · 04-27-2012, 06:31 PM

Just to add to the archives for people who search this:

My problem ended up being the coil on cylinder 2. I plugged in my laptop to the JB4 and saw the misfire code on cylinder 2. Swapped coils with cylinder 1 and the misfire appeared on cylinder 1. Replaced only that coil and everything is back to normal. Hopefully I won't have to replace another for a while but hey now I know where to check first

BrokenVert · 04-27-2012, 06:33 PM

glad it was something simple!

ilikebmxbikes · 04-27-2012, 07:04 PM

Quote:

Originally Posted by BrokenVert

glad it was something simple!

Off topic, BrokenVert, how is your title: Resident Hairstylist?

BrokenVert · 04-27-2012, 07:35 PM

Quote:

Originally Posted by ilikebmxbikes

Off topic, BrokenVert, how is your title: Resident Hairstylist?

I drive a vert. I must be a hairstylist!

mineo77 · 04-27-2012, 07:43 PM

plugs

ccdigmann · 04-30-2012, 12:59 PM

I had exactly the same problem in mine but in the 6 cyl.

Y started changing the sparks and misfire remained there. Then I tested with a new coil and it kept in the 6 cyl. Finally, last night I swapped injectors 6 to 1, hoping the error code moves to the 1 cyl, BUT it dissapeared and the misfires too.

And dont know why exactly it dissapeared, but its gone. May be it will appear soon again. I hope in the 1 cyl...

int2str · 04-30-2012, 01:05 PM

Quote:

Originally Posted by mineo77

plugs

Way to read & comprehend a thread and then follow up with an insightful post!

mineo77 · 04-30-2012, 02:05 PM

Quote:

Originally Posted by int2str

Way to read & comprehend a thread and then follow up with an insightful post!

hahaha..too lazy to read it all. these issues have been discussed so many times on this forum. It was the short and sweet reminder to check plugs.

Phlonx · 05-01-2012, 03:52 PM

Ok so now im getting misfires on cyl 2 and 5. Coils are due for replacement nonetheless so im about to get 5 new coils. Will report back soon

04-18-2012, 08:59 PM	#1
Phlonx Second Lieutenant 19 Rep 222 Posts Drives: YMB F82 M4 Join Date: Feb 2012 Location: United States iTrader: (2)	misfire cylinder 2.. help me diagnose? Hey guys, The car: 08 135i coupe The situation: Had JB4 and DCI only for month or 2. Car has 35k miles, not yet had its big service. BMW just replaced Vanos solenoids due to a CEL (warranty) I had once at WOT in 4th gear on map 1. Directly after that, WOT in 3rd and all of a sudden at about 4k RPM SES came on and threw the car in limp mode. It now does it everytime I go WOT, but only on map 1, map 4 (stock) is just fine. After what felt like a misfire, SES light comes on and any throttle whatsoever makes the car stutter and shake terribly, it won't accelerate. Turn off and back on and everything is fine, no lights, it runs normally. Found these codes today: 29CE Misfirings, cylinder 2 29D9 Misfirings in case of tank filling level too low Any ideas?
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04-18-2012, 09:55 PM	#2
brusk Lieutenant 33 Rep 578 Posts Drives: 2008 135i Coupe Join Date: Jan 2012 Location: Cleveland, TN iTrader: (1)	Replace spark plugs. If that doesn't work swap coil packs with another cylinder to see if the problem follows the coil pack.
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04-18-2012, 11:54 PM	#3
Houman21 Captain 30 Rep 949 Posts Drives: Nothin right now Join Date: Jul 2005 Location: L.A. iTrader: (0)	I had a similar issue with misfires/shake on my e92/N54. Dealership ended up changing the fuel pump and injectors as well as a SW update. __________________ 2008 e92 335i Step \| Is Gone - It was fun but not meant to be \| M3 - Cancelled \| 135 Ordered
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04-19-2012, 07:36 AM	#4
EFI Logics 52 Rep 306 Posts Drives: '08 BMW 135i, 08 535Xi Join Date: Feb 2012 Location: Bethel, CT iTrader: (0)	It sounds like you are describing an ignition related issue. I would look into the spark plugs and coil packs first. -Josh
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04-19-2012, 10:14 AM	#5
Simon_135i Collecting dust! 55 Rep 2,009 Posts Drives: 135i Join Date: Apr 2008 Location: San Diego iTrader: (8) Garage List 2008 E82/135i [0.00]	Spark plugs and/or coil packs first!
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04-19-2012, 10:47 AM	#6
romak47 Captain 53 Rep 941 Posts Drives: like a bat out of hell Join Date: Oct 2008 Location: SoCal iTrader: (0)	when u guys change/swap the coil packs, do you have to get them coded or tuned by BMW? __________________ JB4, DCI, Digi boost, CSL eyelids, 5% tint, KW v2's. Bastuck 85mm quad w/ berk resonated mids, LED int ltg, Perf SSK, CF int trim, 19" SF-71 rims, CDV mod, BMS OCC, ER+tial charge pipe. AR DP's, Helix IC,meth, drilled slotted rotors
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04-19-2012, 11:04 AM	#7
BrokenVert Resident Kerbalnaut 477 Rep 10,703 Posts Drives: Topless Brute/Hybrid Boogaloo Join Date: Apr 2009 Location: Fahrvergnügen/NY iTrader: (0)	fun fact. When my injectors went it started with a misfire in cylinder 2 Muhahahahahahahaha no thats a lie, it was 3, 4 & 5 that were the troublemakers. However, if it isnt plugs and coil packs the injectors should be your next thing on the list. Its an expensive fix (trust me on that one) Have you had them checked under the recall yet? __________________
	Appreciate 0 Quote

04-19-2012, 11:50 AM	#8
Phlonx Second Lieutenant 19 Rep 222 Posts Drives: YMB F82 M4 Join Date: Feb 2012 Location: United States iTrader: (2)	Thanks guys! Will check spark plugs then coil packs then injectors. I havn't taken it up with BMW yet because it only misfires w map 1. There are no problems they can replicate stock. Hopefully the spark plugs or coils take care of it so I can move on makin more powa! __________________ YMB M4, work in progress...
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04-27-2012, 06:31 PM	#10
Phlonx Second Lieutenant 19 Rep 222 Posts Drives: YMB F82 M4 Join Date: Feb 2012 Location: United States iTrader: (2)	Just to add to the archives for people who search this: My problem ended up being the coil on cylinder 2. I plugged in my laptop to the JB4 and saw the misfire code on cylinder 2. Swapped coils with cylinder 1 and the misfire appeared on cylinder 1. Replaced only that coil and everything is back to normal. Hopefully I won't have to replace another for a while but hey now I know where to check first
	Appreciate 0 Quote

04-27-2012, 06:33 PM	#11
BrokenVert Resident Kerbalnaut 477 Rep 10,703 Posts Drives: Topless Brute/Hybrid Boogaloo Join Date: Apr 2009 Location: Fahrvergnügen/NY iTrader: (0)	glad it was something simple! __________________
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04-27-2012, 07:43 PM	#14
mineo77 Lieutenant Colonel 123 Rep 1,925 Posts Drives: 2010 135i,1989 PRO3,2001 530i Join Date: Aug 2009 Location: Portland,OR iTrader: (2) Garage List 2010 135i coupe [7.56]	plugs __________________ 135i coupe  6MT  TiAg  ///M sport http://www.rhominnovations.com www.musicarNW.com www.unitedBMWonline.com
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04-30-2012, 12:59 PM	#15
ccdigmann New Member 2 Rep 27 Posts Drives: Bmw 135i Step N54 Join Date: Apr 2012 Location: SCL iTrader: (0)	I had exactly the same problem in mine but in the 6 cyl. Y started changing the sparks and misfire remained there. Then I tested with a new coil and it kept in the 6 cyl. Finally, last night I swapped injectors 6 to 1, hoping the error code moves to the 1 cyl, BUT it dissapeared and the misfires too. And dont know why exactly it dissapeared, but its gone. May be it will appear soon again. I hope in the 1 cyl...
	Appreciate 0 Quote

05-01-2012, 03:52 PM	#18
Phlonx Second Lieutenant 19 Rep 222 Posts Drives: YMB F82 M4 Join Date: Feb 2012 Location: United States iTrader: (2)	Ok so now im getting misfires on cyl 2 and 5. Coils are due for replacement nonetheless so im about to get 5 new coils. Will report back soon __________________ YMB M4, work in progress...
	Appreciate 0 Quote