air idle valve might be stuck open. drive the car for a bit and see if it settles down, if not you could try resetting the ECU, thus forcing it to re-learn everything.. its possible that the adpative learning has got used to a sticking valve, and now its not is over compensating...
OK story so far,
>
> The car was hard to start from cold - other posts from the group said it was
> the coolant sender or a fault with the Idle stepper motor - so I took both
> off and cleaned (or banged lol)
>
> Now the car started great last night - now its revving to the roof!!! any
> ideas? or is it time for a new stepper motor?
>
> Thanks in advance
>
> Martin
>
>