Fuel System Pressure Release
- Turn ignition off. Disconnect negative battery cable. Slowly open fuel tank cap to release pressure in tank. Remove fuel rail pressure test port cap. Place open end of Fuel Pressure Release Hose (C-4799-1) in approved gasoline container.NOTE: Fuel Pressure Gauge (C-4799-A) contains Hose (C-4799-1).
- Connect other end of pressure release hose to test port. As fuel pressure release hose is tightened onto fuel rail pressure test port, fuel pressure will bleed-off into container.