Hey guys Bit of a tricky one here I've currently just taken my a3 To audi for a cambelt and ever since I've had a slightlt rough idle but my mpg has been really good at least 20% better than previously. I've checked the torsion value on vcds and its at -2.50 when warm is this within normal boundaries? The car has always been a bit difficult to start when warm also but that's been for years now. Any experts got any answers? I don't wanna phone Audi if its not a big problem lol.