As regards the ICV, do you have a breather filter attached to it on that short section of pipe? If you do make sure its not restricting the airflow.. this was the problem I had and although my car still feels like its holding back, when I had the breather filter fitted it was absolutely horrific, completely gutless!
I'm pretty sure my problem is the MAP sensor or at least sensor/electrical related, to the point where you can almost feel the ECU receiving duff readouts! Its definately not mechanical as such as there are points throughout the rev range where it just takes off and others where a moped would pull away from me
The only thing I still cant get my head round is how, when it does start hesitating, it still revs up smooth and fast.. just doesn't put its power down? Infact all the symptoms of a worn clutch, just without the burning and unmistakable slipping feel/sound?
Offer still stands for any local "6" owners to come help me source the problem, beer and cash waiting ftw