2002 Lincoln LS uses a saddle-type fuel tank consisting of 2 fuel pump modules. A fuel transfer pump in the left side of the fuel tank supplies fuel to the right half, which contains The Fuel Pump Module (FPM). The FPM contains the fuel level sensor and an inlet filter. The FPM is controlled by the Fuel Pump Driver Module (FPDM) which is integrated into the Rear Electronic Module (REM) Fuel pressure is regulated by a pulse-width modulator in the FPDM which cycles the fuel pump on and off at varying intervals depending on engine load and RPM. The FPM supplies fuel under pressure to the fuel injection system supply manifold and a fuel level signal to the fuel gauge on the instrument panel.
It is recommended that if one of the fuel pumps fail that BOTH pumps be replaced as a set to avoid repeat repairs. (If one pump has been running for 1500 hours and the motor is worn out, the other pump also has been running for 1500 hours and is very likely to fail shortly thereafter.)
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