friend at work has 93 f150 that will take awhile to start. starts right up on starting fluid. fuel pump keeps running. it has about 58 psi of pressure and only leaks about 5 psi in a 5 min. whats next step reg,relay?

 

Fuel pressure should be 38 psi. I would say check Fuel pressure regulator.

Craig

 

thank you i told coworker we'll see what happens. is the reg before injectors or after ?

 

A sure sign of a bad PCM (computer)

What engine is this truck equipped with?

 

After...

 

truck has staight 6. to test reg a vacume test should show what psi ? he said if he leaves key on for couple of mins it seems to start up.

 

If the fuel pump keeps running when the key is cycled from the off to run position you have a faulty computer (PCM). Classic failure mode.

 

You can check the fuel pressure regulator for signs of leaking by removing the vacuum line then check for signs of fuel leaking out of the FPR by sight and smell. The 58 PSI reading you got (KOEO) is correct for a 4.9L engine.