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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Misfire issue



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      10-26-2014, 02:16 PM   #1
Rawimage
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Misfire issue

So i may have got a little to happy with the e85 pump and i may have put too much in it and now im getting misfires and cel. i was maybe thinking its the coil pack.
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      10-26-2014, 02:42 PM   #2
ad1996
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could also be the spark plugs
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      10-26-2014, 02:59 PM   #3
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Originally Posted by ad1996 View Post
could also be the spark plugs
i just changed my spark plugs not to long ago
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      10-26-2014, 04:56 PM   #4
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Quote:
Originally Posted by Rawimage View Post
So i may have got a little to happy with the e85 pump and i may have put too much in it and now im getting misfires and cel. i was maybe thinking its the coil pack.
Same thing happened to me I installed the walbro 255 pump filled it up to e60 tried flashing my car to bms e85 flash and it wouldn't work so I was stuck with all this e85 running it on jb4 so my car was running dangerously lean I started getting misfires on 3 and 4 cylinders the same day. My suggestion is to drive normally do not go wot. Burn a couple gallons off then replace with 93 to balance out the gas with the ethanol. As soon as I did that the misfires went away. So im not 100% positive the extra e85 caused the problem or just uncovered my weak coils but it worked for me . Good luck bud
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      10-26-2014, 07:52 PM   #5
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Quote:
Originally Posted by Andrew3424 View Post
Same thing happened to me I installed the walbro 255 pump filled it up to e60 tried flashing my car to bms e85 flash and it wouldn't work so I was stuck with all this e85 running it on jb4 so my car was running dangerously lean I started getting misfires on 3 and 4 cylinders the same day. My suggestion is to drive normally do not go wot. Burn a couple gallons off then replace with 93 to balance out the gas with the ethanol. As soon as I did that the misfires went away. So im not 100% positive the extra e85 caused the problem or just uncovered my weak coils but it worked for me . Good luck bud
imma try that as soon i waste some gas cause im still on a full tank
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