sorry chaps will try again...

the turbo is over boosting - as in out of control etc.. she is reading 5 bar, previously it was at 1.5/2 bar.
when driving it there was a kicking back affect coming from the engine

we did a vacumn test on all the pipes - they were fine. the actuator is 6 months old (dont know if this is anything to do with it). we were thinking a faulty solenoid might be the problem - but we have no means of testing it etc.

what would be the common problems causing this

were told that we were lucky that we didnt blow the engine - then again this same chap is still to call and suss her out!