Fuel Pressure: Testing and Inspection

Fuel System Pressure Check - 4.2L/4.4L

Service Repair No - 19.50.13

Special Service Tools














1. Disconnect the battery ground cable.
2. Depressurize the fuel rail.
3. Connect the special tool.
^ Connect to the fuel rail.
^ Connect to the fuel line.
^ Remove the schraeder valve dust cap.

4. Connect the special tool.
^ Connect the schraeder valve and gauge.

NOTE: Naturally aspirated graphic shown.





5. Start and run the engine.
^ Open the valve on the special tool.
^ Note the fuel pressure readings.

WARNING:
^ Do not carry or operate cellular phones when working on or near any fuel related components. Highly flammable vapors are always present and may ignite. Failure to follow these instructions may result in personal injury.
^ Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related components. Highly flammable vapors are always present and may ignite. failure to follow these instructions may result in personal injury.
^ The spilling of fuel is unavoidable during this operation. Ensure that all necessary precautions are taken to prevent fire and explosion.

6. For fuel pressure data, refer to specifications.
7. Close the special tool valve.
8. Remove the special tool.
^ Position an absorbent cloth to collect fluid spillage.
^ Disconnect the special tool from the Schraeder valve.

WARNING:
^ The spilling of fuel is unavoidable during this operation. Ensure that all necessary precautions are taken to prevent fire and explosion.
^ If fuel contacts the eyes, flush the eyes with cold water or eyewash solution and seek immediate medical attention.
^ If taken internally, do not induce vomiting, seek immediate medical attention. failure to follow these instructions may result in personal injury.

9. Remove the special tool.
^ Position an absorbent cloth to collect fluid spillage.
^ Disconnect the special tool from the fuel rail.
^ Use the special tool.
^ Disconnect the special tool from the fuel line.
^ Use the special tool.

10. Install the schraeder valve dust cap to the special tool.
11. Connect the fuel line.
12. Connect the battery ground cable.