Chevrolet Repair: 90 Chev k1500 5.7l, knock sensor, pump fuel

Question
Robert
I am at my wits end with my truck. Cranks like a demon but not fuel.  Have replace the following; fuel pump(last year, used napa pump), fuel filter, plugs, wires, modual, cap, rotor, ESC, ECM, temp sensor, knock sensor, pump relay and coil.
Any ideas would be greatly appreciated. Oh yeah the fuse for the injectors is good.
Thanks
Ted

Answer
Hi Ted.... well start at the begining,,, if it cranks do you have spark...if you have spark do you have fuel, if you spray some fuel down the throttle body does it fire... if it does have you checked the fuel pressure, does it have fuel at the throttle body. if not does the pump come on when you turn key on... should come on and run for 3 seconds...if it doesn't check the relay. if relay is good and pump still doesn't run check for power at the pump. if no power at the pump repair the open in the fuel pump circut. if you do have power at the pump and it still doesn't pump check pump ground...if ground ok and no pump..replace it. hope this helps