my car has a flat spot when you come on boost the car sort of holds back and won't accelerate. it clears up at after the about 10sec's and goes like stink.
it gets worse in higher gears
it holds boost fine.i must find the fault soon cos i'm going crazy
i had put the car in for a tune up and got told they have taken ma dump vavle off and it seems a little better but still the same


do use think it is the turbo thats gone or any ideas folks would be great