Toledo 1900tdi ASV Lost power

Good to everyone, I have a 1900tdi ASV toledo, the car starts well but pulls white smoke, the engine has become noisy and has lost power.
The point has been proven, the pump has been replaced, jolgures and camshaft have been proven.
The problem does not disappear and nobody knows how to give me a solution.
Could anyone please me?
Thank you so much