REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Volkswagen Golf IV (1997 release)

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Volkswagen
	Golf 4
		Instructions
		Engine
		Cooling system
		Fuel System
			Cars with petrol engines
			Cars with diesel engines
				Direct fuel injection
				Fuel tank
				Technical data
				Checking the system of preliminary heating of the diesel engine
				Check glow plugs
				Removing and installing glow
				The system of heating fuel
				Fuel injectors
				The moment of injection of high pressure fuel pump
				The basic malfunctions of the engine management system
		Exhaust system
		Ventilation and heating system
		Coupling
		Transmission
		Suspension brackets and power shafts
		Steering
		Wheels and tires
		Brakes
		Body
		Electrical equipment and wiring

printable version

The system of heating fuel

To increase the yield of diesel fuel at low ambient temperatures must be heated. Heated made further pumping fuel that is returned from the high pressure fuel pump to the fuel tank. Passing through the high pressure fuel pump, the fuel is heated. The fuel return conduit installed control valve, which controls the fuel flow depending on the temperature of the fuel filter. When the outdoor temperature is below + 15 ?� C fuel, warmed high pressure fuel pump is directed to the fuel filter. When the air temperature above + 31 ?� C control valve directs fuel, warmed high pressure fuel pump directly into the fuel tank. Control valve located on the upper side of the fuel filter.

If the engine does not run at low air temperatures due to thickening of diesel fuel, follow these steps:

- Remove the fuel filter and warm up its ferry;
- Replace the fuel filter with a new;
- Warm up the injection device by spraying it with hot water.

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Removing and installing glow

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Fuel injectors