Right for anyone out there who's bothered I'd been moaning on the forums about my car going into limp mode, so I sent my car (Audi a3 8p 2.0 TDI) into the garage and he told me I was getting over boost. So straight away I got on the forums looking for help and I came across FORTE which is a turbo cleaner which you add to your fuel take so ........... I've bought some put it in and I'll keep this post up to date and let you guys know what happens !!!!