Caution: Place a dry chemical (Class B) fire extinguisher near the area before performing a Fuel Tank Leak Check. Before removing the fuel tank for a suspected leak, make sure that the fuel pipes or the tubes are not leaking onto the tank. Once removed, make sure that the fuel is not leaking around the fuel sender O-ring. Failure to follow these precautions may result in personal injury.

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.

1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .
3. Drain the fuel tanks. Refer to Fuel Tank Draining .
4. Remove the fuel tanks.

Refer to Fuel Tank Replacement .

5. Cap or plug the following on the left fuel tank:

•	The 3 fuel sender assembly pipes

•	The vapor recirculation pipe

6. Cap or plug the following on the right fuel tank:

•	The 2 fuel sender assembly pipes

•	The FLVV pipe

7. Install the EVAP vapor pipe to both fuel tanks.

Notice: Do not submerge the fuel tank assembly in water in order to check for leaks in the fuel tank. Submerging the fuel tank in water may damage the electrical components mounted on the fuel tank.

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.

8. Install the crossover hose to both fuel tanks.

Tighten
Tighten the crossover hose clamps to 4 N·m (35 lb in).

9. Apply a soap solution to the outside of the fuel tanks and the pipe and hose connections.
10. Apply 10 kPa (1½ psi) to the fuel fill hose on the left fuel tank. Air bubbles appearing from the fuel tanks indicate a leak.
11. Replace the fuel tanks if it is leaking.

Refer to Fuel Tank Replacement .