Constant engine stall on start - perfect after 5 seconds

[2005e90n46320i]

Hi all,


I have a 2005 E90 N46 320i (sold in Australia).

About 5/6 times the car is started it kicks, holds for about a second then drops violently in the revs and stalls. Only a heavy foot on the gas will keep it from stalling. After this period, the car runs perfectly. No rough idle, no stalling, no fluctuation or hesitation of any kind. I never get a code one it's running smoothly and I've cleared the fault code thrown with the start up issue.

When the start up issue happens and the car stalls, I get 2B63 (camshaft sensor exhaust). I was getting this code constantly every 3 seconds before I replaced the camshaft sensors, and it never pops up apart from the start up issue.

Some things to note, I've replaced:

- Valvetronic Motor (and gasket)
- Valve cover gasket
- Eccentric Shaft Sensor
- Ignition coil packs
- Spark plugs
- Both camshaft sensors (genuine)
- MAF


I'm completely lost here, and I've got no where to go. A guru's help would be extremely appreciated.

Thanks.

[relative4]

Wow, the parts cannon is on full auto. What about the VANOS solenoids?