I have a escort mk6 1.6 zetec e and have run into a big problem, i was riding one day and all of a sudden it would jerk every now and then almost as it was fuel starvation,so i put new fuel pump in and the problem was still there but getting worse. Then it would start cutting out, and the rev counter jumps irradiculy, if you turn the ignition off and turn it back on without starting the engine its fine the rev counter.I thought it might be the coilpack so replaced that and problem still persists,i thought maybe it was computer box so i got another one and problem still the same, now what i cant understand is the longer i leave the car off the more i can drive before it starts to missfire and jerk and cut_out then the rev counter jumps all over again,almost like problem happens when hot. Please help me. thank you

I dont know if this is right but i unplugged icv and engine cuts out and they say if that happens that means its not broken?