Anybody got any idea on this one: i was WOT through 3rd gear to 6,500rpm, changed up to fourth gear WOT and huge flat spot! had it once before.....ive got autotech hpfp (was built on new pump and thrust sensor), bkr7iex plugs, induction kit , bluefin stage 3, S3 intercooler. i have replaced coil packs, version D diverter valve and N75 valve.anyone had the same happen to them? any suggestions are welcome.