Stratus Sedan L4-2.4L VIN X (2003)
Fuel Pump Pickup Filter: Description and Operation
FUEL PUMP MODULE
Description
Fig.9 Fuel Pump Location
The fuel pump module contains the fuel pump, fuel reservoir, level sensor, inlet strainer, fuel pressure regulator, and fuel filter.
Operation
The Chrysler fuel pump module is an in-tank unit with an integral fuel level sensor and pressure regulator. The pump is driven by a 12 volt DC motor
any time the fuel pump relay is energized. Serviceable components on the module include:
-
Inlet strainer
-
Fuel level sensor
-
Pressure regulator
The pump draws fuel through a strainer and pushes it through the motor to the outlet. The pump contains two check valves. One valve relieves internal
fuel pump pressure and regulates maximum pump output. The second valve, in the pump outlet, maintains pump pressure during engine off conditions.
The fuel system use a positive displacement, gerotor, with a permanent magnet electric motor. This fuel system does not contain the traditional fuel
return lines. The regulator contains a calibrated spring which forces a diaphragm against the fuel filter return port. When pressure exceeds the
calibrated amount, the diaphragm retracts, allowing excess pressure and fuel to vent into the tank.
The maximum deadhead pressure is approximately 880 kPa (130 psi). The regulator adjusts fuel system pressure to approximately 400 ±34 kPa (58
psi ± 5 psi).
The inlet strainer, level sensor and fuel pressure regulator are the only serviceable items.
