190 and nothing comes more !!!

BJ 1999 tdi pump nozzle 85 kw. It accelerates to 180 without any problems then it takes forever to 190 and then the beard from Nix uach Gar nix. Actually I assumed that it will bring at least 200. The air mass meter can not be because it accelerates in the other gears without PB. Is it braked (what I can’t imagine ) or is it gurgled only 53000 in the years dangers. Already now thanks for your thoughts and V Orschlag Winnie