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