Power loss Golf 4 TDI 1.9

Hello everyone, I have a VW Golf IV Model 2001 Motor TDI 1.9. And it has no reaction and died at 3100 rpm it only reaches 140 with a lot of effort and is nailed at 3100 rpm. I changed the flow and the problem continues, I changed the emptiness hoses, nothing, I did a cleaning and regulation of injectors and nothing. The vag com plugs and does not show failure, the only thing that indicated was overpricing in Turbo, as more air enters than. Do you cancel the EGR manually but nothing, what do you advise me? The car has only 130000 km and at this time it is in the workshop according to the mechanic the Turbo Tira BN q is going to try another flow ,. Could it be that the catalyst has been covered? Help, Noc what to do and I don't want to continue evil money