1989 Chevy Blazer No throttle respond or fuel from injector

Check th vacuum hose going to the map sensor. If it's soft replace it. Then check your connections from and around the distributor. If there are no distributor pulses, the injector quits working. You may have a badwire or connection or maybe the ecm in the dist may be getting hot and needs some dielectric compuond on the ecm where it bolts down to the dist housing. It goes under the ecm. Also check the pickup coil wires as it moves all the time so it may not be giving the ecm a signal.