Hi im new to the site and have some issues with fuel delivery i replaced the fuel pump and filter had it running yesterday this morning had trouble starting i check the test point on feul rail and no luck i check the filter and gas is running through any help is appriciated 1993 f150 5.0 2wd

 

Do you have an under hood Fuse/ Relay box?

 

Yes, ive checked the fuses and swapped the relay

 

Fuel Pump Relay:

If it's located hanging off the back side of the air filter housing next to the PCM relay, it's the "green" based relay.




Or:

 

open your door and turn the key on but dont start it, you should beable to hear the fuel pump kick on for about 3 seconds. then shut back off.

is it harder to start the first start of the day/after it has been sitting for a while? meaning once it starts you can shut it off it will fire right back up?
if this is your symtoms, then you flow valve in the pump is bad, letting fuel flow back off the motor back into the tank.

or the pump might be kicking on but is to weak to flow enough fuel for the demand of the motor.

both of these symtoms are common on our trucks.

 

Ive got the box setup

 

I can hear the pump kick in and usually starts right up

 

get a fuel pressure gauge.

hook it up. bleed the system then go from there.

 

If fuel pressure at rail, but no start, could be secondary fuel problem. ECU not telling the injector's to fire.

 

No there is no feul or pressure in fuel rail test point