Fuel Pump Module
| ITEM | DESCRIPTION |
|---|---|
| 1 | Fuel Fired Booster Heater (FFBH) fuel supply connection |
| 2 | Flange locking ring and O-ring seal |
| 3 | Fuel supply connection |
| 4 | Fuel inlet filter |
| 5 | Fuel level sensor float |
| 6 | Swirl pot |
| 7 | Active fuel level sensor - 'A' |
| 8 | Jet pump connection - left (passive) side of fuel tank |
| 9 | Fuel level sensor electrical connector |
| 10 | Fuel pump electrical connector |
The Low Pressure (LP) fuel pump module is located in the right side of the tank. The fuel pump module flange is sealed to the tank with an O-ring and secured with a locking ring.
The top flange of the fuel pump module assembly provides the internal and external interface for the tank electrical and fuel connections. The top flange comprises a connection for the internal and external fuel tank breather pipes as well. The flange has external electrical connectors that are connected to the active and passive fuel level sensors, and the in-tank fuel pump.
The lower part of the fuel pump module forms the fuel swirl pot, and provides the location for the in-tank fuel pump. The swirl pot provides a constant reservoir of fuel for the engine drawn fuel supply.
The fuel pump provides sufficient fuel is in the swirl pot to supply the High Pressure (HP) fuel pump demands by supplying the fuel to power the jet pump venturis. The rapid flow of fuel through the venturi nozzle creates a depression which draws fuel back across the saddle from the left (passive) side of the fuel tank into the pump (active) side of the fuel tank. The second venturi draws fuel from the pump side of the fuel tank into the swirl pot. Surplus fuel entering the fuel swirl pot overflows into the usable right side of the fuel tank.
Depending on vehicle configuration, vehicles can be equipped with a Fuel Fired Booster Heater (FFBH). The Low Pressure (LP) fuel pump module has a separate pipe connection for the fuel supply line that is connected to the FFBH fuel pump. The FFBH fuel pump is mounted on the exterior right side of the fuel tank. This pipe connection is equipped with a sealed suction tube which draws fuel from the swirl pot. An additional fuel line connects the FFBH fuel pump to the FFBH fuel inlet. For additional information, refer to: FUEL FIRED BOOSTER HEATER .