1992 Chevy S-10 fuel system problems

My 92 S-10 will start up and run but when your driving and come to a stop it quits. We have checked to see if it is getting fuel to the throttle body by removiing fuel line and turning it over. One time when you turn the key you will hear pump turn on other times it wontbut we have replaced fuel pump twice now thinking maybe we got a bad fuel pump but t still does the same thing. In addition to replacing fuel pump we have also replaced the fuel filter, fuel pump relay, idle air control valve and throttle position sensor. This problem began when we had an intake manifold gasket replaced its been doing this ever since so I dont know if when the intake was taken off if something maybe happened with the wiring to throttle body unit