gra@alh

Hi im hoping somone can help i have in a audi a4 3.0tdi. we have rebuilt the engine and we are now getting fault code P1063 so we have changed the obvious fuel filter,still the same. done a lot of reading but still so many things it could be. i have had all the injectors tested came back fine. changed the fuel pressure sensor on the left bank still the same changed the sensor in the cat still the same. can anyone help