OK time to try again to sort this out as its annoying the hell out of me

The Idle Speed Control Valve has been cleaned and replaced so it not it thats the prob.

Basically once the car has warmed up you can feel a hesitation when keeping the same speed or reducing speed.

Acceleration gets rid of it.

The lower the speed the more lumpy it gets until its very bad at around 25/30mph - or the lower the revs basically.

Its been into Ford and they found nothing wrong I got one of those STAR tester things and it found nothing wrong either!

Havent yet noticed it while the car is cold - the longer the car runs the worse it gets.

Help