Its sounding like air ingress into the system, mine had it last week, I couldnt get any power between 1000rpm and 2k until turbo kicked in and then would shoot away. I would have a look at the fuel lines, or get a bit of clear pipe and run it between filter and pump so that you can see if any airbubbles getting in. Get yourself a Vagcom lead and check for any errors on your ECU, mine started kicking out a valve pump error, been bugging me for ages. I found it to be a small pin hole in the line between the filter and pump as the hot pipe above it melted into it. Hope that helps Rob Many thanks for your advice