1993 Ford Ranger 2.3L fuel pump question

[OconeeDawg]

I have a 1993 ford ranger my fuel pump doesn't always come on when I turn the key. I replaced the pump and inertia switch. It still doesn't come on everytime.. I can turn the ignition on and let it sit for a few minutes and it will usually come on after a few minutes. I also replaced the plug on top of the fuel pump. Any ideas? Could it be my ECM?

 

[adsm08]

Could be the computer, could be the relay, could be the wiring. You will have to test everything before you can be sure what is causing the problem.