I have a 06 GTI with a 6speed manual. With the pedal to the floor the Blow off valve releases pressure at about 3000rpm in 3rd gear, 3500 in 4th, etc etc. If u keep the foot to the floor for a few seconds after pressure is released the car will once again accelerate and build boost. Any ideas what could be the cause ? I recently had the fuel pump replaced, so it shouldn’t be a fuel starvation issue. Please tell me of any ideas of what could be wrong !