New fuel pump still no fuel

Lets say you have power and fuel is pumping it goes from pump to fuel rails in one long line if fuel is at port on rail then ck injectors for hot and ground hot with key on ground with engine turning injectors get ground from ecm ,if no ground ck for bad ground wires then ck ecm ,. if no power to pump ck fuse and fuel pump relay and wire system. some times replacement parts are bad.