I;ve got a focus tddi endura -year 2000,got smoke coming from exhaust(grey) runs a bit rough and theres a kinda knocking seemingly coming from the top left hand side of the engine,like a valve not returning properly,i?ve removed and stripped down the head,decoked and cleaned it all up new valve seals the lot,but the problems still there :(
my engine management light comes on when i start the car but goes off straight away,surely this light should come on and stay on if theres a fault?? any ideas how this management system works,has a fault occured in the sensors or summat????