1998 406 1.9td.25 miles then stops

[captaincaveman1]

my 406 has a running problem, it will start and run even drive for approximately 70 miles then i get an engine management light and the heater plugs light flashing, then it stops. it wont restart,and i get the engine management light on but no heater plugs light. leave it a couple of days then it will start, then the process is repeated. it has been on a diagnostic computer which showed up nothing. can any one help or do i shoot it
now down to 25 miles running before it stops

[oldpug]

Sounds like a wire problem?open up the main harness from the ECU that runs over the engine.I have had a few with broken wires.