Hi just an update phoned the customer today as i haddent heard from them and they have fitted the genuine sensor put it all back together and it has sprung into life happy days.

I would like to thank all people with their input and scope traces it was a good exercise.

howerver it would have been nice if the customer had rung to say all was good they would have been quick enough to get on the phone had it not have started,but all thats well ends well.
Thanks again