Engine cuts out then starts fine until it does it again.

Had this vehicle 2.5 months ago with the same problem. Then I checked and replace the fuel pressure control valve and the pre pump and then found a wire rubbed through at the radiator. I replaced the wire from the ECU controlled relay to the pump and this appeared to fix it then a month ago he rang and said it had started to do it again only once in a while now it could be every klm.