Fuel pump fuse and wiring to fuse box

I'm missing the fuse for the fuel pump in the fuse box which is located in the cab under the dash driver side, slot 15 20 amp fuse. Now I can hear the pump prime ehrn I turn the key sometimes. Not always. But even when I do in not enough fuel to the motor. Unless I step on the gas pedal, which doesn't always work either. I'm thinking I need to readjust the pedal took push it partly down the gas pedal works. I push it all the way down. Car bogs down until I let up. That happens when I drive and I idle.S. I can barely keep the car running at idle. Half the time because of the lack of fuel and which also includes a idle loop as well. Help me.
This car is awesome but it's a pain. I miss my Durango.