fuel system/

i have an 88 s10 2.5 and im lost on a fuel problem. the fuel gets to the carb but it wont go through the injector. ive replaced it but it still doent work. is there some switch or something that causes the injector to open and close and what could be the problem?

the computer opens and closes the injectors. check the wires to the injectors and make sure your getting 12volts to them. the ecm controls the ground to the injectors. make sure your check engine light is coming on when the ignition is on but engine off. if your check engine light is not on then you have a ecm, ecm relay, wiring problem, etc.

First you say carb then you say injector ???