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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 04-19-2013, 05:13 AM
ncord ncord is offline
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Location: ontario canada
 
Join Date: Nov 2009
Posts: 175
Mein Auto: 2006 X3
Misfire 06 X3 3.0

I have same problem with shuddering (misfire) when engine under load @ 3000 rpm.
There was oil in plug #2 so I replaced VCG & plug gasket .new plugs, 2-pre cat.O2 sensors,&
new coil pack in cyl.with oil leak.
I STILL HAVE THE DAMN MISFIRE WHEN I BOOT IT... What Next???
PS; I have never had a Check Engine light . 88K miles
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  #2  
Old 04-24-2013, 12:16 PM
ncord ncord is offline
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Location: ontario canada
 
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Posts: 175
Mein Auto: 2006 X3
Anymore ideas out there????
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  #3  
Old 04-24-2013, 07:26 PM
Supercourse Supercourse is offline
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Location: British Columbia, Canada
 
Join Date: Feb 2008
Posts: 3,165
Mein Auto: 2004 X3 2.5i
Quote:
Originally Posted by ncord View Post
Anymore ideas out there????
CEL bulb definitely O.K. - displays with ignition position II?

Worth checking for codes (stored or live) with a scan tool anyway?

Possible that oil in plug #2 didn't mean that definitely was the misfiring one?
(Distinction between VCG leak causing oil in spark plug hole and fouled plug tip?)

Any way to boot it a bit harder to see if that forces a CEL? (Unlikely)

Try some Techron or GM/BMW advanced fuel system treatment on off-chance that one or more injectors need some cleaning?

That's all I've got.
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  #4  
Old 04-25-2013, 04:49 AM
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mlukas161 mlukas161 is offline
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Location: WNY
 
Join Date: Oct 2008
Posts: 936
Mein Auto: 03 330i, 04 X3
How are the RPMs when its sitting idle?
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  #5  
Old 04-25-2013, 11:36 AM
ncord ncord is offline
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Location: ontario canada
 
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Posts: 175
Mein Auto: 2006 X3
Car idles good @ approx.800 rpm.I just checked the other coil pacs and there all reading0.8 on my amp meter.Car starts and runs great until I kick it back going up a hill or merge onto a highway. I can`t find Techron up here in Canada,but I use fuel injector cleaner about every 2nd fill up.

Last edited by ncord; 04-25-2013 at 11:40 AM.
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  #6  
Old 05-19-2013, 03:12 AM
ncord ncord is offline
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Location: ontario canada
 
Join Date: Nov 2009
Posts: 175
Mein Auto: 2006 X3
Tried switching coil pac from cyl.#1 thru 6.Misfire still happens under load at approx.3000rpm.
What`s left to try????
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  #7  
Old 05-19-2013, 05:55 AM
bdunn bdunn is offline
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Location: Cincinnati
 
Join Date: Oct 2011
Posts: 32
Mein Auto: 2005 X3 2.5i
Had a very similar situation about a month ago, changed plugs, air filter and problem continued. Then took it to my mechanic who couldn't repeat the misfire. Only code was misfire cylinder 2. Turned out to be a bad tank of fuel, drove me nuts.
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