my vito 180cdi on a y plate has the EDC light coming on it has just had both pressure sensors fitted on the common rail and also a new diesel filter and filter heater also it runs for a while then the EDC lights comes on and it goes onto limp mode there is sometimes a noise like a rattle of tappets you can be driving it looses power then it can clear any ideas could it be a blockage in the fuel lines or the injectors all help greatly appreciated cheers sparky