E36 328i Bad Misfire, Hard to Start - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 02-19-2009, 03:20 AM
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E36 328i Bad Misfire, Hard to Start

Hi guys,

Im new to this site and would like your help. Ive a 1996 328i coupe, i recently put a new engine in well for the 3rd time to be honest. everything was fine for a day or two now all of a sudden it take longer to crank than normal, theirs a slight misfire when cold just as you push the Accelerator. It drives ok for about 5 mins till it heats up then just goes into a complete spamm. its loses all power and is misfiring continously all the way until around 5000rpm and then might lift slightly. Ive changed the coils with another set i had from previos engine and also the airflow sensor. Any ideas what might cause this irractic behavior.

Many Thanks

Shane
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#2 (permalink) Old 02-19-2009, 11:14 AM
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There are so many possibilities but coolant temp sensor comes to mind for the bad performance at operating temperatures. This appears to be a thermal problem where the ECU is getting bad information but not enough to set a CEL.
Did you convert this to OBD1 and if so did you swap the temp sensor and, immsmc, the oil temp sensor? There are two sensors that use the exact same plug and are easily crossed. You may want to refer to the bentley to be certain. I don't remember the specifics.
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#3 (permalink) Old 02-19-2009, 02:45 PM
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Tryed everything today, changed the inlet manifold, 6 more coils, coolant temp switch, everything bar what i should have changed in the first place, as it was delaying starting. Turned out to be a faulty crank shaft sensor, i swaped it from my old engine and bang it started perfect and is now running 100% no misfire,s nothing.

Thanks again
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#4 (permalink) Old 02-19-2009, 03:01 PM
OMFG another one!?
 
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Glad you solved your issue!

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#5 (permalink) Old 04-21-2009, 11:56 PM
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Faulty Crank Sensor - Any Codes

Did your BMW display any codes or a CEL when it was misfiring?
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#6 (permalink) Old 04-22-2009, 12:29 AM
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#7 (permalink) Old 04-26-2009, 09:40 PM
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ive goot the same problem with my 328is i just bought, here the crank sensor was ganked at the lot that i bought it from before i bought it!!! anyways i cant find where it plugs into! i know where it mounts on the block but i cant find where the lil bastard plugs into the wire harness!

anyone have any pictures??

sorry for the thread jack butt...
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