Diesel engine fuel system Volkswagen Passat B4

Features of the power supply system of engines «1Y», «RA», «SB», «AAZ»
Model engines "1Y", "RA", "SB" and "AAZ" have a power supply system with a mechanical drive. Engines "RA", "SB" and "AAZ" have a turbocharging system. The plastic fuel tank is...

Power supply system with mechanical drive of engines «1Y», «RA», «SB», «AAZ»
The fuel supply system is shown in Fig. 3-32. The fuel supply system details of different types of diesel engines are shown in Fig. 3-33, 3-34 and 3-35. Fig. 3-32. Fuel supply...

Removal and installation of fuel injection pump
To remove, disconnect the wire from the negative terminal of the storage battery. Remove the hatch cover in the upper part of the clutch housing. Turn the crankshaft until the...

Adjusting the fuel injection advance angle
This adjustment requires an indicator with a 5 mm scale, equipped with a leg at least 95 mm long with a flat tip, as well as a stand for attaching the indicator (for example, like...

Diesel Idle Speed Adjustment
. This adjustment must be performed on a warm engine (oil temperature not less than 60°C), with the fuel injection advance angle correctly set, with clean filter elements of the...

Adjusting the fast idle speed of the diesel engine «AAZ»
Check the correct adjustment of the crankshaft speed at idle. Pull the cold engine start handle to the first fixed position. The speed should increase by 60 rpm. Pull the cold...

Adjusting the maximum engine speed without load
Start and warm up the engine (oil temperature not less than 60°C). Briefly press the fuel supply control pedal all the way down and check the crankshaft speed, which should be...

Adjusting the residual fuel supply
The position of the residual fuel supply adjusting screw is set at the factory and should not be changed during operation. Violation of the screw position may result in the...

Removal and installation injectors
To remove, disconnect the high-pressure fuel lines from the injectors. Disconnect the fuel drain line. Unscrew the injectors with a socket or open-end wrench (Fig. 3-42). Remove...

Disassembly and inspection of the technical condition of injectors
The injector device is shown in Fig. 3-44. Fig. 3-44. Nozzle: 1 — drain pipe nipple; 2 - sealing ring; 3 — body; 4 - spray nozzle nut; 5 - spray needle; 6 - sprayer; 7 — spacer....

Checking the operation of the injector needle valve
1st method When fuel is supplied under pressure from the high-pressure fuel pump to the injector, the injection pressure changes between the start of injection and the end of...

Checking and adjusting the injection start pressure of the injectors
Warning: When checking the injection start pressure, take measures to protect your hands from the high-pressure fuel jet, which may cause serious injury. Attach the injector to a...

Draining sediment from the fuel filter
Remove the holders of the check valve 1 (Fig. 3-49) of the fuel filter. Remove the valves from the filter without disconnecting the fuel lines from the valve. Remove the fuel...

Removal air from the fuel system
After each depressurization of the fuel system, it is necessary to remove air from it as follows: place a container under the fuel filter to collect the fuel; unscrew the purge...

Diesel pre-heating system
The engine preheating system (Fig. 3-50) includes single-pole starting plugs connected in parallel, to which voltage is supplied from the storage battery through the spark plug,...

Malfunctions of the diesel fuel system
Note The most common cause of incorrect fuel injection advance angle is incorrect installation or loose tightening of the fuel injection pump mounting bolts. Formation of wax...

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