1987 chevy g-20 van
1987 chevy 3/4 ton 5.7 w/ 350
replaced fuel pump, fuel filter, pump relay switch, ignition module,dist. cap, plug and wires, temp. sensor switch, ignition coil, alternator and battery
starts , runs for couple minutes shuts off, wait few minutes, starts up again, repeat.
what else could it be?
You could have sediment in the tank possibly clogging the pickup. Did you replace the pickup and screen?
its a fuel relay had the same thing. its a small donut with a set of wires that tell the brain how much to send. the relay is on the back of the carb on the block. I replaced mine and what a world of difference.