Thanks for that, I have a new sensor fitted but still no joy. The harness has been stripped and loomed in with the car loom so I have had a chance to look at it as I taped it up. As I got the engine , ECU and loom in a box I have to say I don't if they all came out of the same car? could that have an effect, I take it they are not all wire the same?

Thanks again for reply.