Replaced fuel rail pressure switch, seems to run for a few minutes and dies. Fuel pump stops prior to the engine stopping. Don't know were fuel pump and eec relays are located. Dual fuel tanks and it doesn't matter which tank is in uses.
I You can get free fusebox layouts at Autozone.com by registering your vehicle.
Try changing the fuel filter. May be too much resistence is causing the fuelpumps to trip their limit switches.
If you have not used a scanner, someone may have one for this old style system. An bad O2 sensor can adjust the fuel mix too lean to run.
If you have a fuelpressure regulator, it may only cycle once for starting and then fail to trigger the fuelpump a second time to restart the fuelpump.
Check with FordF150blog.com or some of the 4x4 truck offroad sites for some pretty good info about problems like yours in the Backwoods and how to fix them.
I hope my solution is helpful.
SOURCE: 1991 ford f-150 fuel pump will not come on
remember the switch only gets power for 1 second when u turn the key on, the common problem is the ignition starter switch comes apart, it is located at top of the steering column near the bottom, drop the column down (2 nuts) and inspect the switch for separation.
SOURCE: 87 F150 wont start. New fuel pump, rail,
try changing the igniton module on the distribuitor in most cases it's the problem if you dont want to buy it you can take the ignition module to a autozone and they will check it for free
SOURCE: 1987 f-150 dual tanks fuel problem
You are right. There are three pumps. It sounds like the transfer pump in the front tank is bad. The in tank pumps just supply the high pressure pump to keep it primed. You need the front pump.
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Tried replacing fuel pump and EEC relay with no improvement.
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