Hi Rev-head thanks for your reply. So far I have had my car checked by a local Bosch fuel injection firm they found nothing wrong with it they bled hoses and checked for leaks etc and charged me £57. Next i had it checked at a local Audi garage for vaccum hoses again no fault found and charged me £45. Each time they used VAG.COM staitionary and on the move no error codes found.I had the egr valve blanked off so eliminating it. (the blank has since been removed for fear of damaging the engine). Next i took it back to the Audi garage to have the turbo stripped, they had the car all day said there was no fault and didn't touch the car at all. No charge. Am i looking for something that's not there? I mean when it goes it really flies!! Something seems to happen at 2,500 revs but just dies there is no kick in the back whatsoever. A local main Audi dealer told me that audi diesels no longer have a kick in the back feeling saying they have power throughout the full rev band. Is this true? It appears that no-one wants to get involved with it just incase they get lumbered with me going back and forth trying to get it fixed.