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Fuel System Pressure Release

SPECIAL TOOL(S)

G04661819Courtesy of FORD MOTOR CO.
Fuel Pressure Gauge
310-012 (T80L-9974-B)
WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel-related component. Highly flammable mixtures are always present and may be ignited, resulting in possible personal injury.
WARNING: Do not carry personal electronic devices such as cell phones, pagers or audio equipment of any type when working on or near any fuel-related components. Highly flammable mixtures are present and may be ignited. Failure to follow these instructions can result in personal injury.
WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before servicing or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved to prevent accidental spraying of fuel, causing personal injury or a fire hazard.
  1. Remove the Schrader valve cap from the fuel rail test port.
    Fig 1: Locating Schrader Valve Cap From Fuel Rail Test Port
    G04661820Courtesy of FORD MOTOR CO.
  2. Install the fuel pressure gauge and slowly open the manual valve to release the fuel pressure.
    • This will allow the fuel pressure to release along with a small amount of fuel from the system. Place the fuel in a suitable container.
      Fig 2: Installing Fuel Pressure Gauge (310-012)
      G04661821Courtesy of FORD MOTOR CO.
  3. When fuel system service is complete, remove the fuel pressure gauge.
  4. Install the Schrader valve cap.
  5. Start the vehicle and check the fuel system for leaks.