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Fuel System Pressure Release

WARNING: ALWAYS release fuel pressure before disconnecting any fuel injection-related component. Do NOT allow fuel to contact engine or electrical components. Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.
  1. Disconnect the negative battery cable.
    2. CAUTION: Install the fuel pressure gauge fitting above the belt to avoid contact with the belt.
  2. Install the Fuel Pressure Gauge Adaptor (J 34730-262), or equivalent, to the fuel pressure connection, located on the fuel rail.
  3. Place the fuel pressure gauge bleed hose into an approved gasoline container.
  4. Open the valve to bleed the system pressure. The fuel connections are now safe for servicing.
  5. Disconnect the fuel pressure gauge from the fuel pressure connection and install the fuel pressure port cap.
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