the car went through a phase of idling erratically and eventually chugged itself out when left sat running, then when driving in heavy stop start traffic, after a period of time the engine would stall when braking and coming to a stop, the idle and timing was altered and it seemed all rosy until today, and again through heavy stop start traffic after a period of time if i didnt fight to keep the revs up the car would cut out and stall and so was a real struggle to get it home, any experience or advice would be useful thanks!