Its AGG mate, yea I scanned it with my cheapo VAGscanner it coming up with a fault that isnt in my handbook, but is around a similar number to the throttle body potentiometer faults. No vac leaks was running perfect yesterday other than the jerkyness (which isnt a missfire and I have changed all engine mounts). Left battery disconnected for 1hr then did the switch ignition on for 30 secs, then start for 30 secs then start again and it was fine again for a while then started doing same fault again. Thinking I'm going to swap to anouther throttle body and maybe invest in VAGcom to recalibrate it?