Hi don't know if anyone can help me, I've got a 2.0 TFSI 2006 plate, when the revs hit around 4000 - 4500 rpm and sometimes sooner I get a violent misfire type boost issue like you hit a Rev limiter, I've got fault codes turbo bypass valve malfunction/open circuit and low fuel pressure regulation fuel pressure outside specification, I found my plug off my diverter valve reconnected it but fault still present any ideas would be great! The fault codes are p0033 and p310b! Thanks for your time!

 

Clear the codes and see if they come back. That'll let you know if they were caused by the disconnected DV.