Fuel Pressure Release: Service and Repair

Fig 1 Intake Plenum Mounting Bolts:

Fuel Pressure Release Procedure - Typical:

WARNING: The fuel system is under constant pressure of approximately 48 psi (330 kPa), even when the engine is OFF.

1. Disconnect negative battery cable.
2. Loosen fuel tank filler cap to relieve fuel tank pressure.
3. Remove cap on fuel rail pressure test port (Fig. 1).
4. Place one end of fuel pressure release hose, tool C-4799-1 (or equivalent), in an approved gasoline container. Connect the other end of this hose to the fuel rail service port. Fuel pressure should bleed off into container.
5. Perform necessary fuel system service procedure.