Fuel Tank Unit: Description and Operation

Operation
The fuel initially enters the module through a flapper valve, located at the bottom of the module, and primes the fuel pump. A portion of the high pressure flow from the fuel pump is diverted to operate a venturi jet pump. The jet pump draws fuel from the fuel tank into the fuel pump module. This design permits optimum fuel pump operation during vehicle maneuvers and driving on steep hills with low-tank full levels.

Features
This assembly includes a check valve which is inside the manifold outlet of the fuel pump module. The function of this valve is to maintain pressure in the system after the vehicle is shut down. The pressure retention helps prevent hot starting concerns.

Location
The fuel pump module is mounted in the module retainer (integral to fuel tank).