Fuel pump will not run

Timing could be 180 degrees out try switching plug leads on distributor i.e. 1&3 2&4

You need to check fuel pump relay. Usually located under hood and I believe pass side fender well. That's odd for pump to run all the time unless relay has stuck on or has been jumped to run. (By that I mean someone has wired in run position) the computer usually grounds relay to turn on fuel pump

If you need further help, I’m available over the phone at https://www.6ya.com/expert/rodger_15a879d9d9556eea

ck the inertia switch located on the foot wal under the carpet

It sounds like your fuel pump is overheating. Once it gets too hot the bearings swell and the pump locks up. When it cools, they contract and the pump works again. It is also possible the fuel pump relay is having a thermal failure. You can determine this by hooking a voltmeter into the fuel pump supply wire and keep it where you can see it while it is running. If the voltage goes down and then the truck stalls, it would be the relay, if the voltage goes down after the truck stalls, it would be the fuel pump. Since the pump is only running when the engine is running, once the engine dies it'll turn off the fuel pump so it is important to pay attention to what happens first.

The red wire should be hot. the inertia switch, when the top button is pushed,makes contact from the red wire to the tan wire which goes to the fuel pump.

got 1987 ford f-150 no power to fuel pump, checked fuel cut off swith seems ok, new fp relay still nothe can I run hot wire to pump and if I can which ones the hot wire??

Maybe you need to test the (pcm) power relay, it controls the fuel pump relay. Once the key is turned on the pcm will initialize the power relay, it in turn will turn on the fuel relay for 2 seconds to prime the fuel rail prior to starting. Since the pump runs continuosly, it means the pcm isnt properly grounding the ckt or the relay is faulty.

look at pass. side kick panel and make sure emergency shut off switch was not activated, make sure red button is pushed in all the way

I would change the filter first, if that doesnt help check the fuel pressure. if it doesnt hold around 30psi fuel pump could be bad.

There is a Fuel Pump relay. Not sure if Ford has a Relay Box under the Hood though. There are also Fuses that Control some items of the Fuel System. Try the Relays first and see what you have.