1988 Chevy Astro van 4.3L 215 K, 65k since rebuilt engine installed. I have fuel to the Throttle body but the 2 injectors will not work, when I jump power to the injectors they pump fuel continuously. I have replaced, fuel pump and filter all sensors except knock sensor, new distributor cap and electronic ignition module in distributor cap it has a new ECM electronic control module. There is plenty of fuel pressure to lthrottle body but it stops at the injectors. Where does the signal or power to the injectors come from?
Thanks for your help you guys are great.