Hi, I am pretty stumped. My car (54plate 2.0tdi) has been juddering really badly but I just got my dmf, clutch and gearbox sorted and its improved it massively. But there is still the occasional judder under full load. I got an error code saying I needed my egr valve cleaning too which I haven't done yet, should that be all I need to do now to finally stop the juddering? Thanks in advance and advice will be very appreciated.