Tool Required
J 34730-1A Fuel Pressure Gage
Caution: Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.
- Turn the ignition OFF.
- Disconnect the negative battery cable in order to avoid possible fuel discharge if an accidental attempt is made to start the engine. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
- Loosen the fuel filler cap in order to relieve the fuel tank vapor pressure.
- Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
- Connect the J 34730-1A to the fuel pressure connection at the left front of the fuel rail. Wrap a shop towel around the fitting while connecting the gage in order to avoid spillage.
- Install the bleed hose of the gage into an approved container.
- Open the valve on the gage to bleed the system pressure. The fuel connections are now safe for servicing.
- Drain any fuel remaining in the gage into an approved container.
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
