2006 330i misfire at cyl 6 does not follow coil stays at cyl 6

[macmachleit]

so i just got a 06 330i and keep getting p0306 cyl 6 misfire so i got a new coil and plugs and same thing so i pulled the coil and put a spark plug in and it is not getting spark at all changed injectors and no change i dont think its getting power to the coil??

- - - Updated - - -

1st bmw im stumped

[Old525i]

I have the same problem. No solution yet.

[macmachleit]

do u think it could be the ecu or ive heard that a burnt valve can cause this

[marvinstockman]

Go to Youtube and look up testing for spark.

Yes, you could definitely have a mechanical problem.

[Old525i]

Mine runs fine until it hits a certain engine load, usually around 2200 rpm. I still have to do a compression test. One of these days.

[Codes2]

When there is enough 'cylinder misfire' occurring, the fuel is shut down for that cyl. I'm not sure about the spark though.
Upon restarting the car, all cylinders are re-enabled for fuel.

Maybe it detects something is wrong (misfires) and then shuts it down.
That would make troubleshooting the spark/fuel quite moot.

Focus on what that cyl does after first power up and start. Is there fuel/spark then?

[macmachleit]

So I've been through everything on the car compression spark fuel the coil it's always Cylinder 6 until I unplug the plug on the top of the valve cover I think it's for the valvetronic the car runs fine I plug it in and it's back to Cylinder 6 misfire

[Old525i]

Interesting. I replaced the Valvetronic Sensor because it was leaking oil through the connector. Now I have this problem with cylinder 6 also. Can you drive with the Valvetronic connector off? In my case, the misfire problem shows up only when you accelerate hard. If you let it misfire for a while, the computer shuts off spark to cylinder six in order to protect the catalytic converter.

However, if I turn the engine off and back on, cylinder 6 operates as normal until I accelerate hard again.

[Old525i]

I found the problem with the engine misfire. The problem is that the spark plugs I bought came with a gap of 0.066. The gap should be 0.044 inches. I adjusted the gap and the problem went away.