Checking the fuel system pressure 4.0L (Discovery 3)

Special tool

Fuel pressure gauge 310-116-01

Fuel Pressure Test Adapter 310-116 (LRT-19-006A)

1. Disconnect the ground cable from the battery.

2. Remove the engine cover. Engine Cover - 4.0L (12.30.50)

3. Release the clamp and disconnect the purge line.

4. Remove the fuel rail Schrader valve cap.



5. Install the special tool on the Schrader valve on the fuel rail.



6. Connect the purge line.



7.

CAUTION: Do not carry or use a cellular telephone when working on or near any fuel related parts. Risk of ignition of flammable vapors. Failure to follow these instructions may result in personal injury.

WARNING: Do not smoke or carry a lighted cigarette or open flame of any type when working on or near fuel-related items. There is a risk of ignition of flammable vapors. Failure to follow these instructions may result in personal injury.

CAUTION: Some fuel will inevitably spill during this operation. Make sure that all necessary precautions are taken to prevent fire and explosion.

Start the engine and let it run.

• Open the valve on the special tool.
• Record the fuel pressure readings.

8. Nominal fuel pressure values are given in the technical specifications.

9. Close the valve on the special tool.

10. Release the clamp and disconnect the purge line.

11. Remove the special tool from the Schrader valve.

12. Place the cap on the Schrader valve.

13. Connect the purge line.

14. Install the engine cover. Engine Cover - 4.0L (12.30.50)

15. Connect the ground wire to the battery.