1992 mazda b2600i extended cab will not get fuel through injectors

If the pump is working as designed you should have fuel in the fuel rail. Next is to dignose why the injector is not firing, did they lose power or ground. Pull off an injector wire, one wire should be HOT all the time (12 Volts should be present at ALL 4 injector wires) If 12 volts is not there you will need to find the main relay that control the power to them. If power is ther then its a little more difficult as the negative side is control by you cars computer and signals to it. You would have to check inputs into the computer and shoul dbe check by a techniciamn with appropriate tools.