BMW M3 Forum (E90 E92) - View Single Post - 2008 E92 M3 intermittent misfire on multiple cylinders! 👎🏼

M3Richard · 04-02-2019, 03:08 PM

Apologies for this plea for help being my first post, but I'm struggling with the following:

I've currently got a 2008 e92 m3 with just under 76k miles and wondering if anyone else had similar issues.

I picked the car up in Wales and drove it all the way home to Northern Ireland with no issues what so ever. A few hundred miles later and having been left parked up in airport carpark over a weekend I was less than half a mile from home (50-60 mile trip) when I felt it hesitate before EML came on and it went into limp mode. I nursed it home as it began misfiring and got progressively worse. I turned it off and then attempted to start it again but it didnt. It was very smokey from exhaust.

I scanned it for faults, which showed misfiring on all but 2 cylinders code 2B47 - Misfiring cylinder 6, exhaust deteriorate permanent being one and the respective code for each of the other cylinders.

I had the car transported to an Indy BMW specialist who suspected it may be a crank shaft sensor and replaced it. The car was driven for another 150ish miles without issue before the same symptoms repeated, however was stopped sooner this time. Again the car was transported to mechanic who said it started first time and wasn't missing a beat from when it arrived with him.

Mechanic has changed nothing since and I now have the car home again. Having washed it during the week I turned it on and allowed it to warm up to temperature before turning off and leaving a few hours. I then tried the same again to see if the symptoms occurred again; they did... At 75 degress EML on and misfiring occurred. I knocked it off and on 30mins later to find it was running fine again.

I scanned codes later that evening to find the following:
2B35 - DME misfire with cut off cyl. 1
2B36 - DME misfire with cut off cyl. 2
2B37 - DME misfire with cut off cyl. 3
2B38 - DME misfire with cut off cyl. 4
2B39 - DME misfire with cut off cyl. 5
2B3A - DME misfire with cut off cyl. 6
2B3B - DME misfire with cut off cyl. 7
2B3C - DME misfire with cut off cyl. 8
2B41 - DME misifire with cutout several cylinders

There were a couple of historic faults and if believed may be of relevance I can post those too.

04-02-2019, 03:08 PM	#1
M3Richard New Member 4 Rep 18 Posts Drives: E92 2008 BMW M3 Join Date: Apr 2019 Location: Northern Ireland iTrader: (0)	2008 E92 M3 intermittent misfire on multiple cylinders! 👎🏼 Apologies for this plea for help being my first post, but I'm struggling with the following: I've currently got a 2008 e92 m3 with just under 76k miles and wondering if anyone else had similar issues. I picked the car up in Wales and drove it all the way home to Northern Ireland with no issues what so ever. A few hundred miles later and having been left parked up in airport carpark over a weekend I was less than half a mile from home (50-60 mile trip) when I felt it hesitate before EML came on and it went into limp mode. I nursed it home as it began misfiring and got progressively worse. I turned it off and then attempted to start it again but it didnt. It was very smokey from exhaust. I scanned it for faults, which showed misfiring on all but 2 cylinders code 2B47 - Misfiring cylinder 6, exhaust deteriorate permanent being one and the respective code for each of the other cylinders. I had the car transported to an Indy BMW specialist who suspected it may be a crank shaft sensor and replaced it. The car was driven for another 150ish miles without issue before the same symptoms repeated, however was stopped sooner this time. Again the car was transported to mechanic who said it started first time and wasn't missing a beat from when it arrived with him. Mechanic has changed nothing since and I now have the car home again. Having washed it during the week I turned it on and allowed it to warm up to temperature before turning off and leaving a few hours. I then tried the same again to see if the symptoms occurred again; they did... At 75 degress EML on and misfiring occurred. I knocked it off and on 30mins later to find it was running fine again. I scanned codes later that evening to find the following: 2B35 - DME misfire with cut off cyl. 1 2B36 - DME misfire with cut off cyl. 2 2B37 - DME misfire with cut off cyl. 3 2B38 - DME misfire with cut off cyl. 4 2B39 - DME misfire with cut off cyl. 5 2B3A - DME misfire with cut off cyl. 6 2B3B - DME misfire with cut off cyl. 7 2B3C - DME misfire with cut off cyl. 8 2B41 - DME misifire with cutout several cylinders There were a couple of historic faults and if believed may be of relevance I can post those too.
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