Fuel Tank: Description and Operation

FUEL TANK
The fuel tank is constructed of a plastic material Its main functions are for fuel storage and for placement of the fuel pump module.

All models pass a full 360 degree rollover test without fuel leakage. To accomplish this, fuel and vapor flow controls are required for all fuel tank connections.

A fuel tank check valve(s) is mounted into the top of the fuel tank (or pump module). Refer to Fuel Tank Check Valve information.

An evaporation control system is connected to the fuel tank check valve(s) to reduce emissions of fuel vapors into the atmosphere. When fuel evaporates from the fuel tank, vapors pass through vent hoses or tubes to a charcoal canister where they are temporarily held. When the engine is running, the vapors are drawn into the intake manifold. Certain models are also equipped with a self-diagnosing system using a Leak Detection Pump (LDP). Refer to Emission Control System for additional information.

Fig.28 Fuel Tank Check Valve Location:

FUEL TANK CHECK VALVE
The fuel tank is equipped with 2 interconnected fuel tank valves The valves are located on the top of the fuel tank (Fig 28)

The fuel tank check valves will prevent fuel flow through the fuel tank vent (EVAP) hoses in the event of an accidental vehicle rollover. The EVAP canister draws fuel vapors from the fuel tank through these valves.

The valves are not serviced separately. If replacement is necessary, the fuel tank must be replaced. Refer to Fuel Tank Removal/Installation.