Just in case this fault happens to anyone else, i found the fault, the crank sensor housing are different from model to model, so all you need to do is unbolt the old housing and put the original on. On mine the engine came out of an automatic, all that was needed was to swop them over, unfortunately though you have to drop the gearbox and remove clutch and flywheel. but sorted. Thanks for those who helped
Regards
Mick