Fuel Pressure Release: Service and Repair
CAUTION: Fuel supply lines will remain pressurized for long periods of time after engine shut down. This pressure must be relieved before servicing of the fuel system is begun. A valve is provided on the fuel charging assembly for this purpose. Remove the air cleaner. Attach Tool T8OL-9974-A or equivalent to the fuel diagnostic valve on the fuel charging assembly Pressure in the fuel system may now be released.