1984 Porsche 928 injector problem is not firing?

If the injectors on a 1984 Porsche 928 are not firing, it could be due to several issues. First, check the electrical connections and wiring to the injectors for any signs of damage or corrosion. Additionally, inspect the fuel pump and fuel pressure regulator to ensure they are functioning properly; low fuel pressure can prevent the injectors from operating. Lastly, consider testing the engine control unit (ECU) for faults, as it controls injector operation.