P0306 When Starting Cold

[Michaelj]

2006 3.0 with 67,000 miles. When I start cold I get a p0306 misfire cylinder 6 code. I changed the coil pack, I changed the spark plug. I still got the code with cold starts. I swapped the coil packs and plugs around from cylinder to cylinder and the problem stayed with cylinder 6. If I shut it off and restart it goes away, sometimes if I rev it, it goes away. Then I got a p0365 crankcase position sensor B bank 1. I replaced the sensor and the code cleared. I still get the misfire on cylinder 6 with cold starts though. I took the DISA off and inspected, it seems ok. I see no leaks in the intake boots. Any ideas? Thanks!

[bastereo]

http://www.xoutpost.com/bmw-sav-foru...t-misfire.html

[bastereo]

Well, hope that's not your problem.

[Michaelj]

Thanks for the link. I too hope that I don't have to pull the cylinder head off. Could you see the failure in your gasket when you took the head off?

[bastereo]

Nope, not in the gasket or sealing surfaces of the head or block.
But the tops of 2 pistons were steam cleaned and and looked brand new. The other 4 had some carbon/sludge build up

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