Tools Required

J 34730-1A Fuel Pressure Gauge

Caution: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

Notice: Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system:

1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical 4.6L.




Caution: Wrap a shop towel around the fuel pressure connection in order to reduce the risk of fire and personal injury. The towel will absorb any fuel leakage that occurs during the connection of the fuel pressure gage. Place the towel in an approved container when the connection of the fuel pressure gage is complete.

2. Install the J 34730-1A to the fuel pressure service connection, located on the fuel rail.
3. Turn ON the ignition, with the engine OFF.

Caution: Do not drain the fuel into an open container. Never store the fuel in an open container due to the possibility of a fire or an explosion.

4. Place the bleed hose of the fuel pressure gauge into an approved gasoline container.
5. Open the bleed valve on the fuel pressure gauge in order to bleed the air from the fuel pressure gauge.
6. Command the fuel pump ON with a scan tool.
7. Close the bleed valve on the fuel pressure gauge.
8. Command the fuel pump ON with a scan tool.
9. Inspect for fuel leaks.

1. Place the fuel pressure gage bleed hose into an approved container and open the bleed valve in order to bleed OFF fuel system pressure.
2. Place a shop towel under the J 34730-1A to catch any remaining fuel spillage.



3. Remove the J 34730-1A from the fuel pressure connection.
4. Drain any fuel remaining in the fuel pressure gage into an approved container.
5. Inspect for leaks using the following procedure:

5.1.	Turn ON the ignition, with the engine OFF for 2 seconds.

5.2.	Turn OFF the ignition, for 10 seconds.

5.3.	Turn ON the ignition, with the engine OFF.

5.4.	Inspect for fuel leaks.

6. Install the cap on the fuel pressure connection.
7. Install the fuel injection sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical 4.6L.