Thanks for the reply MB Doc, I have traced a cable from the module to the rear of the engine before, but very difficult to see where it connects to the sensor. I presume its mounted on the bell housing, ie where the engine bolts to the gear box. I tested the ignition timing with a stobe light when warm at idle 650rpm and it read 20deg btdc., I think it should be 7-11 deg. This is resulting in backfires at start up and a hesitant acceleration. Have replaced fuel pumps, filter, distributer cap, leads and plugs. have also checked fuel pressures at cold, hot, driving and stationary.So it seems I am back to ignition problems.
I might just add that this problem occured overnite, so its leading me to believe that its some electronic wizadry has had it.
Thanks again for the help.
Any tests I can Do?
Mike