I have a 2000 Ranger with a 2.5 l4. It will not start. It just cranks and cranks. I checked the relays and they are good. A fuel pressure test gauge confirms that it's a fuel issue. Upon turning the key on, I can hear the fuel pump come on and I get 10 psi. On the second click of the relay, it immediately drops back to zero psi. I briefly jumpered the relay to keep the fuel pump on and I got a max psi of 15. I got the truck to fire up, but it ran like crap for about five seconds and then died. Is this typical of a bad pump, or could it be something else?

 

Welcome to the forum

Typical is that the pump doesn't run at all

Assuming you don't smell gasoline or have a pool of it under the fuel filter area then the problem will be in the fuel pump assembly

So you will need to lift or pull the bed back
Then you can test voltage at the pump, should be battery voltage

There are two fuel lines at the gas tank
OUT from the Pump
IN from the filter
The IN line has a fuel pressure regulator inside the tank on the assembly, round disc shape, it could fail, but not sure it can be replaced without buying the whole assembly
The OUT just has a hose to top of assembly but it can crack.

Generally speaking its almost 20 years old so.................replacing the whole assembly probably wouldn't be out of line

I would use Motorcraft but its expensive, reason I would is because its a hard part to swap out
3rd party parts are way cheaper, but often fail, under warranty, but still a pain to swap

 

So I pulled the pump assembly after removing the bed. For those who haven't done it yet, it's very quick and easy to remove the bed. I noticed that the short rubber fuel line that goes from the top of the pump to the steel line out had a 1 inch split/crack in it. I had already purchased a Denso pump, so I swapped it out and it came with a new short rubber fuel line. I quickly slapped it all back together and it fired right up.

 

Good work

Thanks for posting the FIX