1993 Chevy Cheyenne throttle body injectors

Engine Mechanical problem
1993 Chevy Cheyenne V8 Two Wheel Drive Manual 206 th miles

Hey, I have a 5.7 engine and the injectors wont spray. I changed fuel pump, gas lines, put a differant throttle body on it, and still it's doing the same thing. I checked the throttle control censor, not oxygen censor, but could the trucks computer have somthin to do with the injectors not working? I am just at a loss and would love to get the truck running again. Gas go's to throttle body but wont come out the injectors. THANKS.