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Misfires - Engine runs rough when cold, fine when warm
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12-03-2014, 11:38 AM | #1 |
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Misfires - Engine runs rough when cold, fine when warm
I've been having misfires in my 2007 335i for about 6 months. 68k miles.
Symptoms - Runs rough after starting and driving cold, fine once the engine warms up. If I accelerate hard while cold, CEL comes on and the car runs very rough. I can reset the CEL by restarting the car, then I drive gingerly until engine warms up at which time I can drive like normal with minimal issues at worst. What's been done - Replaced plugs. Fine for a day or two then same problems. Autozone codescan said misfire on Cyl 3, so I replaced that coil. No real change. My shop said it had a "fuel code plausibility"...took to dealer hoping for HPFP, but their computer said "Fuel low-pressure" sensor. Was quoted $380 and charged $500 to change the sensor, but problem is still there. BMW dealer also said *all* of my injectors need to be replaced, but they quoted $2k so I said no thanks for now (will have my shop do it if needed). Diagcode in question is D1350_00000000_01_02 - "All fuel injectors in cylinder bank 1 and cylinder bank 2" I have a full set of coils. Should I change them all our or is that 100% not the issue? Thanks for any advice!!! Other fault codes identified by dealer: DME: Combustion misfires, cylinder 3 DME: Misfire at low tank fill level (probably related to that sensor) DME: Combustion misfires, cylinder 1 DME: Combustion misfires, cylinder 2 DME: Combustion misfires, several cylinders |
12-03-2014, 02:28 PM | #5 |
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I think your injectors are having a leaks my friend. It is doable for a DIY. You need to have them coded as well. DIY Section has this I believe.
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12-03-2014, 02:32 PM | #7 |
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Also, a cursory search turned up this on a DIY injector swap (N54):
http://www.e90post.com/forums/showthread.php?p=16958661 |
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12-03-2014, 04:09 PM | #8 |
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Seems my injectors might be covered by a recall, potentially the same one concerning the HPFP.
Can anyone point me to the actual BMW bulletin or recall notice that I can show to my dealer when they inevitably tell me to get lost? |
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12-10-2014, 10:36 AM | #9 | |
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Quote:
http://www.bimmerfest.com/forums/sho...d.php?t=525852 |
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12-30-2014, 01:48 PM | #10 |
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Subscribed....OP any update on this?
I have identical issue to yours except in my case it is either cylinder 1, 2, 3 misfiring OR its ONLY cylinder 1 misfiring. Unfortunately, there is no pattern to it except that I can only reproduce it every morning after it has been standing in cold overnight. Any insight will be appreciated. Note that in my case HPFP and all 6 injectors were replaced a while back and I have not had any issues till now. My thread is @ http://www.e90post.com/forums/showthread.php?t=1070123 Thanks. |
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335i, misfire, n54 |
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