Description and operating principle of the fuel supply system (Focus 1)

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Description and operating principle of the fuel supply system


Pos.Spare Part NoName
1 Fuel filter - all except diesel vehicles
2 Fuel Pump Module/Fuel Level Sensor
3 Fuel filter - vehicles with diesel engines 75 hp or 90 hp.
4 Fuel filter - common rail injection vehicles
5 Water drain valve - vehicles with common rail injection system
6 Inertial Fuel Shutoff Switch (IFS)
7 Fuel Line Ground Clamp - 1.4L, 1.6L, 1.8L, 2.0L or Diesel Vehicles
8 Fuel Line Ground Clamp - 2.0L Duratec ST Engine Vehicles
9 Fuel composition correction module - vehicles with fuel composition correction
10 Fuel tank filler pipe
11 Fuel tank

Fuel pump module


The fuel pump module is used on all vehicles except vehicles with diesel engines.

Fuel is supplied under high pressure to the fuel injectors through the fuel manifold, which is equipped with a fuel pressure regulator.

Fuel level sensor


The fuel level sensor is used only on vehicles with a diesel engine.



Cars with diesel engine 75 hp or 90 hp.


Fuel is drawn from the fuel tank by the high pressure fuel pump, which then delivers the high pressure fuel to the fuel injectors.

Vehicles with common rail fuel injection systems


Fuel is drawn from the fuel tank by the high pressure fuel pump, which then delivers the high pressure fuel to the fuel rail, which then delivers the fuel to the fuel injectors.

Cars with 2.0L Duratec ST engine


The vehicle is equipped with an electronically controlled returnless fuel system. The benefits of a returnless fuel system include improved control of fuel vapors, reduced fuel temperature, and reduced amounts of fuel vapor in the fuel tank. A fuel pressure sensor mounted in the fuel rail provides a signal to the general electronic module (GEM). Using this pressure information, the GEM adjusts the voltage supplied to the fuel pump module, which in turn varies the fuel flow delivered by the pump.

Fuel composition correction module - vehicles with fuel composition correction


The fuel pump module wiring harness on vehicles with fuel trim is equipped with a fuel trim module that converts DC voltage to AC voltage. The conversion is necessary to prevent galvanization of the fuel sensor "map" integrated into the fuel pump module when ethanol-based fuel is used.

All cars


The IFS switch cuts power to the fuel pump in the event of a collision.

Fuel lines (fuel lines) are made of metal, but have flexible connections.

The fuel lines are supplied as a kit and are clamped to the brake lines.



The fuel line ground clamp is the only ground path for discharging static electricity from the fuel lines. If the clamp is missing or broken, a new Ford clamp must be installed.

(The original article is available on the website: www.fordbook.ru)






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