97 civic dx

i have a 97 civic dx . it started breaking down on me like it wasnt getting gas. i tryed listening for the fuel pump and heard nothing. i replaced the fuel pump and it started and ran for a day or two. now it is doing the same thing and will not start. there are 2 swithes in the main relay ,they close when the key is turned tellin the fuel pump to pressurize the gas lines to the motor. when relieving the pressure in the fuel system to change the fuel pump there was no gas or even really anypressure built up. could it be the relay or might it be something else?