the diagnostic says its the throttle bodie as its not boosting right and its having a bit of a hissy fit now and again when driving,replaced throttle bodie,mass air flow,checked all breathers etc and its still doing same and also same fault of throttle bodie coming up on diagnostic.can anyone help?spent over £8oo at audi and they cannot fix it and spent a few hundred at garages and they can find fault?

 

Have they tested the throttle position sensor?

 

Intermittent or continuous problem? If intermittent, it may be caused by your ECU relay starting to fail. I originally got intermittent CCA open circuit faults, later throttle body malfunction, all because my ECU relay 165 906 381 was starting to go bad.