I Replaced timing belts on this vehicle after tension roller fell apart.The vehicle was still running,though very noise and starting ok. Now after timing belt replacement starting from cold requires a lot of cranking and eventually starting with excess unburnt diesel smoke and smell. Now i know the most obvious reason could be a timing error,but i don't usually make these kind of mistakes. I will re-check the timing . There are no fault codes present but in live data the only items that don't look right are as follows: KEY ON ENG OFF:Main injection advance -3 degrees. ENGINE RUNNING:This moves to +3 degrees Could any one confirm these values ? AIR FLOW METER :Running shows 200 mg/stroke @1.5 volts.This value when engine is revved doesn't increase beyond 2.1 volts,which looks low to me ?Does anybody have any ideas or data to add to this ,please ,Thanks .