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Home >> Jaguar >> 2014 >> XFR-S >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (Fuel Tank & Lines (V8 4.2L Petrol/V8 S/C 4.2L Petrol)) >> Fuel Tank And Lines (V8 4.2L Petrol/V8 S/C 4.2L Petrol) >> Description And Operation >> Overview >> Overview

Description And Operation: Overview: Overview

WARNING: This page is about a different car, the 2010 Jaguar XF and 2009 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

The 4.2L V8 fuel system is only available on NAS vehicles from 2010MY.

The fuel system uses an electronic returnless system. The system comprises a pump module mounted in the fuel tank to deliver fuel at variable flow and pressure to the fuel rails which in turn supply fuel to the fuel injectors. Fuel pump operation is regulated by a fuel pump driver module (FPDM) which is controlled by the engine control module (ECM). The fuel pump driver module (FPDM) regulates the flow and pressure supplied by controlling the operation of the fuel pump using a pulse width modulation (PWM) output.

Two fuel level sensors are installed in either side of the saddle tank. The sensors are a MAPPS (magnetic passive position sensor) which provide a variable resistance to ground for the output from the fuel gage.

The fuel system also incorporates an evaporative emission (EVAP) system which is part of the on-board refueling and vapor recovery feature. The function and operation of the system is designed to meet evaporative emission (EVAP) requirements to minimize fuel vapor losses.

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