1994 Chevy Truck Engine won't stay running

Electrical problem
1994 Chevy Truck V8 Four Wheel Drive Automatic

I had truck running, turned it off, restarted, turned it off. Now it won't restart. It has a new battery, cables, PCM, I cleaned all connections, battery reads 12.4 volts, when I turn the ignition to start it, the battery sounds like it is dead, will take a jump, starts with initial spray of fuel, then stalls. If someone turns key while I spray fuel into throttle body, truck will stay running, once I stop spraying fuel into the throttle body, the engine stalls. I can hear fuel pump turn on, installed new fuel filter. Throttle body injectors spray once, do not seem to spray afterwards. Fuel pump fuse is good. Fuel pump relay has been changed.

Any input would be appreciated,
John