right, i give them my car back and they looked over it. They said the problem was caused by a seized wastegate which they've now cleaned and unseized. I thought i read some where the stilo's don't have waste gates but they could be meaning the overboost valve. Hope this solves the problem, i havn't given it a good hamering yet to see if its cured but the turbo does seem to sound a little sweeter. do you guys think that cleaning it was a good idea or should it have been replaced, i mean as long as its fixed it doesn't really bother me.
cheers for all your help