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Old 09-19-2012, 09:36 AM
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idjit idjit is offline
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Location: Fredericton area, New Brunswick, Canada
Join Date: Feb 2012
Posts: 147
Mein Auto: 2003 525i
Is this typical of Vanos?

Now that the colder weather is back I have the same issue as I did last fall and winter.

At temperatures starting somewere below 15C-20C (60F-65F), when I start in the morning I get missfire on cylyinder 3 (with cutoff). Just #3. No other codes.

After warmed a bit an "off/on" will often completely clear the rough idle. If I just start driving, usually the light doesn't come on. If I idle for it to warm up it does. Either way it's missing. Sometimes worse than others

The plugs have been replaced since last year and I swapped the number 3 coil with number 1. Also a new DISA unit this summer and there are no vacumm leaks. Thorough smoke testing was done as hoses ccv, etc were all replaced last January.

Always #3 and never any other. Is that typical?

Thanks, -Bob

Last edited by idjit; 09-19-2012 at 09:38 AM.
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