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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 11-07-2015, 12:07 PM   #1
Joe boy M3 1690
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Join Date: Aug 2014
Location: Irvine
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My Ride: Lagunna blue M3 cab
CYLINDER 2 misfire?

Hi I'm experiencing issue with my e46 m3. 1st while driving car I noticed car had slight misfire, decided to drive it for next 3 weeks, then suddenly car starts sputtering and sounding like a suberu. I turned car off then started it again. It ran fine but with slight misfire. So 2 weeks later car does this again only when you turn it off on on again, it doesn't get better.

Changed inactive coils and replaced plugs, but the car still has a misfire, pulled the codes and got Cylinder 2 Misfire, it's Definetly not the coils, has anyone ever experienced this issue before CYLINDER 2 Misfire
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Old 11-08-2015, 10:57 AM   #2
Commando
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My Ride: '02 325Ci MT '04 M3
Is it firing at all on cylinder 2? Is there a healthy spark?
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Old 11-08-2015, 11:35 AM   #3
Joe boy M3 1690
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Thanks for reply, no cylinder to is not working at all, if you disconnect plugs from coils 13456 there is a noticeable drop in revs meaning there good, however when u disconnect plug on cylinder 2 there's is no drop in revs, nothing happens, my oil breather pipe is blocked could this cause the misfire, as the plug in cylinder 2 is always soaked in oil, where the rest a dry? Any ideas or info would be greatly appreciated thanks
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Old 11-08-2015, 07:07 PM   #4
Commando
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If the plug is soaked on the top side where the cap goes then its only the seal for the cover leaking. Straightforward fix.
If its the electrodes that are oily then check if fuel is mixed in with the oil. If there is fuel you need to confirm the plug is sparking. If its sparking properly then check the compression.
No fuel? Check the injector.
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