Misfiring on all cylinders, residue coming from exhaust

Dmacc · 05-06-2012, 03:13 PM

About five days ago I started seeing some rough idling bouncing between 600-800 on cold starts, the car literally would shake like it was struggling, but once it warmed up, it was completely fine. Two days ago I took it to my buddy at a shop and he suggested it could be faulty o2 sensors.

Today the car took a turn for the worse though, I cold started this morning, saw the crazy idling, but it started to misfire, and eventually finally threw codes. They all read as misfires on all cylinders. Also, as it was misfiring, it started to spew some brownish residue (I suspect oil) but it wasn't pure, it was watered down.

In the next few days I'm going to go back to stock and see if I can get the car to BMW. I have a procede rev 2 but the issue persisted when the procede was removed. Any ideas as to what this could be? Someone also mentioned it could be a bad coil pack?

Any help is much appreciated

jpsimon · 05-06-2012, 03:17 PM

When one of my injectors died I had these kinds of symptoms. At first just a rough idle then eventually it misfired like crazy at idle.

BigBambu · 05-06-2012, 03:41 PM

^

Recently, I too experienced misfires on cylinder 5. Faulty injector was the culprit.

robc1976 · 05-06-2012, 04:16 PM

Ditto!

Dmacc · 05-06-2012, 05:34 PM

Thanks for the replies, I'll update this thread again once I hear back from BMW

05-06-2012, 03:13 PM	#1
Dmacc Colonel 200 Rep 2,799 Posts Drives: 2011 BMW 1M Join Date: Mar 2010 Location: So Cal iTrader: (1)	Misfiring on all cylinders, residue coming from exhaust About five days ago I started seeing some rough idling bouncing between 600-800 on cold starts, the car literally would shake like it was struggling, but once it warmed up, it was completely fine. Two days ago I took it to my buddy at a shop and he suggested it could be faulty o2 sensors. Today the car took a turn for the worse though, I cold started this morning, saw the crazy idling, but it started to misfire, and eventually finally threw codes. They all read as misfires on all cylinders. Also, as it was misfiring, it started to spew some brownish residue (I suspect oil) but it wasn't pure, it was watered down. In the next few days I'm going to go back to stock and see if I can get the car to BMW. I have a procede rev 2 but the issue persisted when the procede was removed. Any ideas as to what this could be? Someone also mentioned it could be a bad coil pack? Any help is much appreciated __________________ thanks to MGallop
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05-06-2012, 03:17 PM	#2
jpsimon Team Zissou 3065 Rep 10,197 Posts Drives: 2022 AWD M3 Comp - SMB Join Date: Dec 2006 Location: CT iTrader: (7)	When one of my injectors died I had these kinds of symptoms. At first just a rough idle then eventually it misfired like crazy at idle.
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05-06-2012, 03:41 PM	#3
BigBambu Private 2 Rep 93 Posts Drives: E90 335xi Join Date: May 2011 Location: CT iTrader: (0)	^ Recently, I too experienced misfires on cylinder 5. Faulty injector was the culprit. __________________ Loudest wastegate in the NorthEast
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05-06-2012, 04:16 PM	#4
robc1976 DIYER 614 Rep 5,521 Posts Drives: E90 335i Join Date: Mar 2012 Location: Illinois iTrader: (14)	Ditto! __________________ JB4 G5, Stage 3 LPFP, Stage 2 MOTIV PI, VM 6466 ST, Custom OCC W/ SS lines, ER FMIC, ER CP W/HKS BOV, M3 control arms, M3 guide rods, M3 upper links, M3 front & rear sway-bars, HPA rear toe arms, Wavetrac LSD, HPF Gen 2, DEFIV kit, KW clubsport, Delrin solid SF bushings, stoptech rotors, Rogue Tranny Mounts, 1M bumper, M3 CF hood, M3 fenders, M3 OEM sideskirts, Mtech rear bumper, CSL trunk, MORR VS8.2 rims 245/295
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05-06-2012, 05:34 PM	#5
Dmacc Colonel 200 Rep 2,799 Posts Drives: 2011 BMW 1M Join Date: Mar 2010 Location: So Cal iTrader: (1)	Thanks for the replies, I'll update this thread again once I hear back from BMW __________________ thanks to MGallop
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