1987 ford F150 starts and runs fine for about 5 minutes and then dies. I have replaced the fuel filter, fuel pump, fuel lines, the distributor, coil,and all relays and checked all vacume lines.
Check fueltank ventilating
did u change the distributor by yourself if you did you need to time the engine to the camshaft so the rockers will lift the valves at the right time
Does it run as it should for the first five minutes. If so it sounds like a heat related problem on an electronic part.
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