Posted by Steve Harrison on July 22, 2008, 7:30 pm
Sorry for not posting the exact engine code and VIN.
Would be very grateful for any inspiration / suggestions regarding this vehicle.
It has a repeatable misfire at approx 1200rpm. This is slightly less pronounced when cold but is still there. It is like a HT miss on a petrol, quite heavy miss. With the revs higher there is no miss. The vehicle came from another garage who have fitted a new pump ECU (New vauxhall)believing this was the fault. There are no codes stored and I have compared live data to another similar car and nothing seems to be abnormal even when the miss is happening. I have scoped the crank sensor and the pattern is stable and cleaned the EGR as a precaution. The vacuum system runs at 25inhg. The car is owned by a local authority and is filled from there own tank, there is no evidence of petrol. I do intend to substitute an alternative fresh diesel supply but I don't expect it to resolve the miss. I have looked through numerous posts but none seem to match this case.