GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Metro 🢒 Engine 🢒 Engine Electrical 🢒 Fuel Pressure Gage Installation and Removal

Installation Procedure

Tools Required

    • J 34730-1A Fuel Pressure Gauge.
    • J 34730-75 Fuel Rail Adapter.
  1. Relieve the fuel pressure. Refer to Fuel Pressure Relief Procedure .

    2. Object Number: 238387 Size: SH
  2. Disconnect the fuel feed hose (2) from the chassis fuel feed pipe. Use a shop towel in order to catch any remaining fuel that may leak.

    3. Object Number: 243514 Size: SH
  3. Install the J 34730-75 Fuel Rail Adapter (1) to the chassis fuel feed pipe.
  4. Connect the fuel feed hose (2) to the J 34730-75 fuel rail adapter (1), and secure the hose with the hose clamp.
  5. Securely connect J 34730-1A the fuel pressure gauge (3) to J 34730-75 the fuel rail adapter (1).

    6. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Connect the negative battery cable.

    7. Tighten
    Tighten the negative battery cable retainer to 5.5 N·m (49 lb in).

  7. Start the engine.
  8. Idle the engine at normal operating temperature.
  9. Use the following procedure in order to check the fuel pressure:
    10. • 200-240 kPa (28.5-34 psi) with the engine idling.
    • 270-310 kPa (38.5-44 psi) with the engine off and the ignition switch on.
    • The fuel pressure should remain at least 200 kPa (28.5 psi) within 1 minute of key--off and the ignition switch on.
  10. If the fuel pressure is not within the specification, refer to Fuel System Diagnosis .

Removal Procedure
  1. Relieve the fuel pressure. Refer to the Fuel Pressure Relief Procedure .

    2. Object Number: 243514 Size: SH
  2. Remove theJ 34730-1A fuel pressure gauge (3) and the J 34730-75 fuel rail adapter (1) from the fuel feed hose and from the pipe. Use a shop towel in order to catch any remaining fuel that may leak.
  3. Connect the fuel feed hose to the chassis fuel feed pipe, and secure the hose with a clamp.

    4. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Connect the negative battery cable.

    5. Tighten
    Tighten the negative battery cable retainer to 5.5 N·m (49 lb in).

  5. Turn ON the ignition in order to pressurize the fuel system.
  6. Turn OFF the ignition.
  7. Check for any fuel leaks.