Mcaully

Hi I have an a3 8p with a 2.0tdi bkd im looking at replacing the injectors does anyone know if new ones will require coding I’ve heard that apparently they don’t need to be coded but some are saying they do need to be than

Hi I have an a3 8p with a 2.0tdi bkd the car has developed a rough idle but only when the car is up to temperature and juddering quite a lot it doesn’t do it at all when the car is cold there’s white smoke on start up but clears straight away the car smells pretty strong of fuel when your stood next to the bonnet Does anyone have a solution or know what it could be causing this issue thanks