why wont my truck stay running?

i dont hear it prime sometimes

oooo again it seems to be my lot in life....the black battery cable has a clamp end and a loop end....take the bolt off the loop end and wirebrush it...the chassis tooo....and where the 1/0 cable connects to the engine block too, to insure a steady 12 volts and three hundred or more cold cranking amps~...this way the fuel pump relay will have 12 volts to make the contacts happen....the ignition relay will be happy now that it has steady 12 volts~....get a NEW battery these start to NOT take a charge 10% per year- --(according to NM Qureshi, battery engineer of 40 years){interstate battery}