Yep, limp mode and the dreaded "17965 - Charge Pressure Control: Positive Deviation" error.
More details here
http://www.myturbodiesel.com/forum/f23/new-golf-owner-turbo-issues-15477/It's currently at a garage getting a mr muscle turbo clean, vacuum test and egr/intake clean. Hopefully that'll sort it out. I should know in the next day or so.
If I still have any money left after paying the mechanic, I'll let you know.
What sort of bhp gains would I get on the 90 (i'm guessing maybe 10ish) or is it more about a smoother power curve?
Thanks
Martin