Vehicle diesel fuel system Audi 80 B4

Working principle of diesel engine
Unlike a gasoline engine, in which a ready-made air-fuel mixture enters the combustion chambers, in a diesel engine, only air is sucked in during the intake...

Power supply system for TD diesel engines Distribution injection pump — principle of operation
After air is admitted into the combustion chambers, it is compressed to 28-34 bar and only at this moment fuel is injected. Naturally, injection can be carried...

Cold start accelerator
A cold start accelerator is sometimes compared to a choke control. However, this is not true. And although when starting a cold engine, you have to pull the...

Valve injectors
Valve injectors are the final component of the diesel engine power system. They are designed to inject fuel into the vortex chamber with its simultaneous...

Power system — repair
The following are the types of repair work related to the diesel engine power system available to the motorist. This list may be wider, for example, it is...

Start of injection pump supply — adjustment
Adjustment of the start of injection pump supply is required, for example, after work during which the toothed belt was removed. For adjustment, a special...

Accelerator cable — removal and adjustment
Withdrawal The accelerator cable is very sensitive to kink. If, when removed by negligence, it is placed at the wrong angle, then only this can lead to a...

Cold start accelerator cable — removal and adjustment
If the cold start accelerator cable is broken, then this does not cause a particular problem. At low temperatures, a cold engine starts even without the use of...

Idling — check
The instruments available to the motorist for measuring the number of revolutions are of little use for fine tuning. In this case, special instrumentation is...

Power system — TDI diesel engines
General description Unlike the diesel engine with swirl chamber fuel injection, TD1 engines have electronically controlled direct injection. It is based on the...

TDI diesel fuel system sensors
Accelerator pedal position sensor TDI engines do not have an accelerator cable. Information about the position of the accelerator pedal is transmitted to the...

Fuel injection system of TDI engines — check
The electronic control unit of the fuel injection system of TDI engines can recognize and register 21 malfunctions of parts of the injection system and engine...

TD Engine Preheat System
Each type of AUDI 80 engine has its own preheating system. The TD engine preheat system consists of the following main parts: A) glow plug relay. The relay not...

TD Engine Preheat System — Check
Glow plugs - check The fact that one of the glow plugs is defective is usually noticeable when starting a cold engine. For all cylinders with serviceable glow...

TDI engine preheating system
Due to the nature of the design of direct injection engines, preheating is different. These engines start without preheating at temperatures below 0°C. And if...

TDI engine preheating system — check
A defect in the preheating system of the TDI engine is only noticeable at temperatures below -10°C, because it is difficult to start. A malfunction of the...

Turbocharger
The process of preparing and burning the air-fuel mixture in the combustion chambers of a diesel engine is quite long compared to a gasoline engine. For this...

Turbocharger — removal and installation
The strictest cleanliness must be observed when working on the turbocharger. Thoroughly clean all removed parts and lay on a clean lining. Cover exposed parts...

Boost Air Cooler
Air entering through the air filter is accelerated and compressed in the turbocharger. Compression of the air and the fact that the turbocharger is driven by...

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80(B4, 1991-1996)

80(B3, 1986-1991)

80(B3, 1986-1991, petrol)

80(B2, 1979-1986)