06-12-2020, 01:02 PM | #1 |
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Very odd misfire
Hey Folks,
I have an odd case on my hands. 2011 X3 35i with 175k kilometres on the clock. Plugs replaced at 100k with OEM plugs. About 10k kilometers ago I had a few blips in throttle and the check engine light came on. I scanned and got multiple misfire and cyl 6 misfire. I took the plug/coil and moved them to cyl 2 and put cyl 2 into cyl 6. I went back out for a drive and sure enough engine light came on, scanned and the misfire had moved to cyl 2. Purchased a coil, replaced it...no issues since. Last week...same deal...blip blip blip (car has warmed up) under good amount of throttle. Scanned (worried it might be 6) and sure enough it was 6 again. Took 6 plug/coil and swapped with 1. Went back out for a drive...car was fine until about 25 mins later (warmed up). And it began to misfire again. Scanned this time and it was still cyl 6 This morning I took out all the plugs...they all looked fine for having 75k kilometres on them. Even brown glaze...no charring. I cleaned them all up with brake cleaner, wiped them down, installed randomly with coils, but made sure newest coil went to cyl 6. Went back out for a 15 min drive and all was good. With all that said, why do I have a feeling I'm being plagued by the cyl 6 injector issue that's happened to a few with the N55 motor. Any idea's? |
06-12-2020, 02:03 PM | #2 | |
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06-12-2020, 04:06 PM | #3 | |
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https://www.dropbox.com/s/m5kx7bjo62n19jn/IMG_20200612_075107.jpg?dl=0 That's the number 6cyl plug...the others look the same. |
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06-12-2020, 04:35 PM | #4 | |
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https://bmwfault.codes |
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06-12-2020, 04:44 PM | #5 | |
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06-12-2020, 09:49 PM | #6 |
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So the car has been running fine today with no blips at all under 75% throttle. I decided to scan the car anyway and 3 stored codes:
108001 - Intake electrical short circuit positive 140011 - Misfiring - injection cut 108932 - intake:group error I ran them in the BMW code site and I'm a little confused on the intake code...could that be something that's causing a misfire? My idle is great...no hesitation...just the occasional throttle blips followed by check engine light sometimes if I keep my throttle down long enough. |
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06-13-2020, 06:10 PM | #7 |
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So the wife went out...under heavy throttle she noticed blips in response followed by engine light. I scanned it when she got home and following codes:
140010 - misfire several cylinders 140310 - cylinder 3 misfire recognized 140001 - combustion misfires, a plurality of cylinders: injection is switched off 140301 - misfiring cyl 3: fuel injection is switched off 140011 - misfiring: injection cut So my thoughts now would be to purchase a new coil for cyl 3 and go from there...any suggestions? |
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06-14-2020, 08:31 AM | #9 | |
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