So recently bought a 84 Coupe DeVille with the HT4100. Motor turns but will not fire. Replaced the plugs, plug wires, fuel filter, fuel pump, fuel strainer, battery, starter and did oil change. Still will not fire. Double checked all the replaced parts everything checks out. Checked the throttle body to see if it was supplying gas, no gas. Butterfly opens and closes fine no gas from the injectors. Pulled the fuel lines at the throttle body. One was dry the other had fuel in it. So my questions are, could it be the throttle body has gone bad or are the injectors bad?