Truck wont start

The other day on my way home my truck was acting like it was running out of gas. The next moring i got out to start it and it would not crank.. it would turn over but it would not crank. I changed the fuel pump , checked fuel pump fuses but when i turn key on the fuel pump does not hum..
and it still will not start. I sprayed starting fluid in the intake and tried to crank it and it still would not fire up.. ANy ideas..?