Problem kicked off 2weeks ago,filled up,and drove off,car jolted as if electrics switched off,engine ecu warning light came on,but car still ran,drove into town car park and as engine revs dropped she died on me,took out plugs no spark,towed home,replaced ecu and coil started no probs,then week later started on the button,drove 3 miles and ecu light on again,just got home,then dead again,when shes cold runs no problem,getting fuel pump buzz as usual,done auto data ignition checks,with ign on and a volt meter across the ignition amplifier plug terminals 15 and 1 i cant get a circuit unless its pluged into the amplifier,any ideas gratefully received

 

Crank sensor maybe? They tend to act up when they get warm if they are breaking down.

 

Cps would be my first thing to look at too, when it is running do the wiggle test on all the connectors.
New connectors are only around £3 or so, usually the female side that plays up, but that's about right!!
tabetha