Tdi High Revs/Sticky

Morning Guys,

I need some help, i have a Mk4 Golf GT Tdi 115BHP 6 Speed, its a 2001 X reg.
Basically have owned the car for about 18 months now, and it has had this problem since i bought it, at the time i thought the clutch was on its way out, symtons are when i am driving in any gear the car seems to drive fine until it goes 2000 Revs, the needle shoots up and then the power kicks in a few seconds later, almost as if the clutch is slipping, but its not as i have had the clutch checked. The diags that i have done so far:
1, Replaced the Air Mass which hardly made any difference at all, although when i leave it unplugged although the car drives crap the revs dont shoot around.
2, Had clutch checked - all ok.
3, Tried another working air mass of a working car and still does the same.
4, On VAG computer - no errors reported...

It seems it is defo something to do with the airmass, but what i have no idea? Any ideas?

That sounds weird. If the needle shoots up (I'm assuming the actual engine revs go up too) then if you're not feeling any difference for a few seconds, then I'd think there is something wrong between the engine and wheels, just thinking about it logically.

Does it happen irrespective of which gear you're in at 2000rpm?

Yes mate the engine revs up too, yes does not matter which gear i am....