Riviera V6-3.8L SC VIN 1 (1995)
Fuel Pump
The fuel pump is an electric twin turbine high pressure pump mounted inside the modular fuel sender assembly. The fuel is pumped to the engine
at a specified flow and pressure by the fuel pump. Excess fuel is returned to the fuel sender by a return pipe. The fuel pump delivers a constant
flow of fuel to the engine even during low fuel conditions and aggressive vehicle maneuvers.
The fuel pump operation is controlled by the Powertrain Control Module (PCM) through a fuel pump relay. Refer to Computers and Control
Systems / System Diagnosis / Diagnostic Chart A-3. for further description and a wiring diagram of the fuel pump relay.
Fuel Pump Strainer
A woven plastic fuel pump strainer is attached the bottom of the fuel sender assembly. The functions of the fuel strainer are to filter contaminants
and to wick fuel.
The life of the fuel pump strainer is generally considered to be that of the fuel pump. The fuel pump strainer is self cleaning and normally requires
no maintenance. Fuel stoppage at this point indicates that the fuel tank contains an abnormal amount of sediment or water. In which case the fuel
tank should be thoroughly cleaned. If the fuel pump strainer is plugged, replace it with a new one.
Fuel Level Sensor
The fuel level sensor is attached to the side of the modular fuel sender assembly. Fuel is sensed by the position of the float and float arm, and a
signal is sent to the display in the vehicle instrument cluster.
