Hi all am new to the site and have purchased my first td6 which is so much better than my p38a. I have a interesting problem where the car when warm starts to misfire if I switch of the engine most of the time it goes away but returns later you only know if it returns when you come to a stop the car starts to jerk just before you stop or if you place it in reverse again it's not pleasant it jerks. I have taken of the EGR valve and cleaned it but I don't know how or if it's working. I have had a dianostics done and it's saying that the EGR valve P0404 code is showing and DTC 3505 glow device circuit and 1613 smooth running gear any help would be great wife is doing my head in