Hi all, I followed the advice of some of the guys on here and had the diverter valve on my 2.0TFSi replaced for the revison D and it made a huge difference. BUT, the car seems to have lost some of the power again and has started to make a slight chatter like it did before the uprated one was fitted? Could it have blown again, or could a pipe have been split while the MD mechanic replaced it? Any ideas? Cheers, Si.