Fuel Tank: Description and Operation

Fig.3 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 (Fig. 3). The tank is made from High density Polyethylene (HDPE) material.

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.

All models are equipped with one rollover valve mounted into the top of the fuel tank.

An evaporation control system is connected to the rollover 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 the Emission Control System for additional information.