8000 rpm? That's your problem right there If somebody mentioned the DMF then you must have a manual. The flywheel can get loose and cause problems in timing.
VW TDI forum, Audi, Porsche, and Chevy Cruze Diesel forum
A forum community dedicated to Audi, Volkswagen, Porsche, and all turbo diesel owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, TDI, maintenance, and more!