Chevrolet Repair: 1992 S/10 4x4/ 4.3 TBI, fuel pump relay, crank sensor

Question
i stopped to fill up w/gas and when i went to start the truck all it would do is just turn over and never start. the truck was running a little ruff before i stopped/ i have replaced the fuel pump relay, fuel filter, distributar cap and rotar button. pulled off one spark plug getting good spark. no fuel to the injectors, i think. PLEASE HELP. THANKS  

Answer
Hi Blan,
I assume the reason you replaced the relay is because you tested it and found no power getting to the fuel pump?
You should be able to hear the pump run for about three seconds after turning the key to run.
If it runs, then check for pressure...you need a full 14 PSI at the fuel rail.
If you have that, check the injector fuse. You should have already checked the fuel pump fuse.
If you have power to the injectors, then a crank sensor may be the problem.
There is also the possibility of just a loose connection in the wires, or a bad ground near the tank.
Van