DeVille V8-4.6L VIN Y (1998)
Fuel Tank Unit: Description and Operation
Modular Fuel Sender Serviceable Components
Components General Description
The serviceable components on the modular fuel sender are the fuel sender strainer, the fuel level sensor assembly, and the fuel tank pressure sensor.
The strainer acts as a coarse filter to: filter contaminants, separate water from fuel, and to provide a wicking action that helps draw fuel into the fuel
pump.
Fuel stoppage at the strainer indicates that the fuel tank contains an abnormal amount of sediment or water. Therefore, the fuel tank should be removed,
cleaned, and the filter strainer replaced. Refer to Fuel System Cleaning.
Fuel Level Sender Assembly
The fuel level sender attaches to the outside of the reservoir and measures the amount of fuel in the tank. The fuel level sender consists of the following
components: the rheostat, the float, and the float arm. The assembly converts changes in the fuel level to a variable electrical signal used to drive a gauge
in the instrument cluster. An electrical harness attached to the fuel sender cover connects the rheostat to the vehicle's wiring harness.
Fuel Pump
The electric fuel pump is a fuel pump located inside the modular fuel sender. The electric fuel pump operation is controlled by the PCM through two fuel
pump relays.
