The PCV system looked a little odd so we removed the inlet manifold, checked all the breather hoses and replaced the PCV valve itself which had a split diaphragm in. However, the idle hasn't really improved.

I tried running with the MAF disconnected but it made no difference so assume that is ok.
I checked the plugs and they appear to be a little sooty but were firing ok and the coils have been tested and are OK.
Autologic does not show any DME fault codes, and the valetronic is not in limp-mode BUT if i unplug the valvetronic actuator motor with the engine running the idle smooths right out and idles perfectly!

I've removed the cam-cover and visually inspected the valvetrain and all appears to be fine.
I've removed the actuator motor and it spins quite freely so is not jammed.

Refitting the motor and doing a "learn valetronic stop positions" with AL you can see the whole assembly driving and stopping OK - everything appears to be working OK but when its all connected it runs really rough - anyone come across this before and offer some advice?

My current thinking is that either the motor isnt man enough to adjust the valvetronic setup when the engine is running, or its being fed duff information from the eccentric shaft sensor and 'putting' the valve opening in the wrong positions - any advice?