Important: A fuel system pressure test is a part of several diagnostic tables and symptoms checks. In order to perform this test follow the procedure described below.

Tools Required

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



2. Remove the fuel plug bolt (2) from the fuel rail (1).



3. Install the J 41041 fuel pressure gauge adapter (2) to fuel rail (4).
4. Install the J 34730-1A fuel pressure gauge (3) to the J 41041 fuel pressure gauge adapter (2).

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.

5. Connect the negative battery cable.

Tighten
Tighten the negative battery cable terminal retainer to 15 N·m ( 11 lb ft).

6. Start the engine and check for fuel leaks.
7. Idle the engine at the normal operating temperature.
8. Check the fuel pressure as follows:

•	210-260 kPa (30-37 psi) with the engine idling.

•	250-300 kPa (36-43 psi) the engine is not running and the ignition switch is ON - FUEL PUMP IS RUNNING.

•	Fuel pressure should hold at or above 180 kPa (26 psi) within one minute of the engine not running while the ignition switch is OFF - FUEL PUMP IS NOT RUNNING.

9. If the fuel pressure is not within the correct specifications, refer to Fuel System Diagnosis .

1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .



2. Disconnect the J 34730-1A fuel pressure gauge (3) from the J 41041 fuel pressure gauge adapter (2). Use a shop towel in order to catch any remaining fuel that may leak.
3. Disconnect the J 41041 fuel pressure gauge adapter (2) from the fuel rail (4). Use a shop towel in order to catch any remaining fuel that may leak.




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. Install the fuel rail plug bolt (2) with a new gasket onto the fuel rail (1).

Tighten
Tighten the fuel rail plug bolt to 50 N·m (36 lb ft).

5. Connect the negative battery cable.

Tighten
Tighten the negative battery cable terminal retainer to 15 N·m ( 11 lb ft).

6. Turn ON the ignition in order to pressurize the fuel system.
7. Turn OFF the ignition.
8. Check for any fuel leaks and repair as necessary.