THANKS FOR THE ADVICE BUT HOW DO I TEST FOR A PULSE FROM THE POWER AMP.
ALSO DO YOU KNOW IF THE OUTER BRAID TYPE WIRE AROUND THE TWO INNER WIRES IN THE FLYWHEEL SENSOR SHOULD CONNECT TO THE SENSOR BODY,(I HAVE A CONNECTION AT THE PIN IN THE PLUG END ALONG THE WIRE BUT DOES NOT SEEM TO BE CONNECTED AT THE OTHER END).

BYE THE WAY I SEEM TO HAVE FIXED THE PROBLEM,I HAD HALF THE RELAYS OUT TO GET AT THE JETRONIC ONE IN THE MIDDLE OF THE BOARD,OPENED THIS ONE UP CHECKED IT WORKS O.K.,PUT THEM ALL BACK,PULLED THE WIRING HARNESS PLUG OF THE E.C.U. FOUND A BIT OF ALUMINIUM CORROSION HAD SPREAD TO BOTTOM LEFT PIN,WIRE BRUSHED IT OUT PUT IT ALL BACK TOGETHER, BINGO! STARTS FIRST TIME BEEN RUNNING GREAT FOR TWO DAYS (FINGERS CROSSED IT KEEPS GOING).
STILL LIKE TO KNOW ABOUT THE ABOVE TWO QUESTIONS.