Fuel system (gasoline) of the car Audi 100 C4

Electric fuel pump
1 Inner part of the fuel intake housing 2 Connecting flange 3 Fastening clamps 4 Fastening bolt 5 Wire 6 Wire clamp 7 Fuel hose The fuel pump is mounted on the...

Fuel filter
The filter is designed to last a long time, so it does not need to be replaced as part of normal maintenance. Only when it becomes clogged should it be...

Fuel tank sensor
Replacement of the sensor (1) is carried out according to the instructions for removing the fuel pump until the connecting flange is removed. Now put your hand...

Air filter
It is recommended that the air filter element be replaced every 60,000 km, however, it is suggested that the filter be removed and blown out with compressed...

KE-Motronic injection system parts
Throttle valves In one of the intake manifold pipes there are two throttle valves. The smaller of these valves is connected by a cable to the gas pedal in the...

Functioning of the KE-Motronic injection system
Launch The vacuum created by the engine pistons lifts the air measuring plate. At the same time, the distributor piston opens the fuel supply to the injectors....

Self-diagnosis of faults in the KE-Motronic injection system
Many types of testing can only be performed with special devices. Since the devices that a car enthusiast has for personal use may not be accurate enough and...

Troubleshooting individual components of the KE-Motronic injection system
Below are described troubleshooting tasks that do not require special tools or devices. Checking the injectors Lock the ignition. To check if fuel is reaching...

Removal the injector of the KE-Motronic injection system
Disconnect the fuel lines and carefully move them to the side. Pull out the injector together with the cartridge using pliers. Care should be taken to ensure...

Adjusting the idle speed and CO content in the KE-Motronic injection system
With the KE-Motronic system, there is no option to adjust the speed. The CO content, on the other hand, is adjustable. This requires an accurate gas analyzer....

Malfunctions and self-diagnosis of the KE-Motronic injection system
The control unit can recognize faults and remember them. If there is a suspicion of a fault in the ignition system or injection system, you can interrogate the...

Querying the memory device of the KE-Motronic injection system
Perform a test drive for at least five minutes. The engine must be warmed up. The engine must be accelerated above 300 rpm, the accelerator pedal must be fully...

Diagnostics of faults of the KE-Motronic injection system

General structure of the Monomotronic fuel injection system
Control unit It is located on the right side of the gutter and receives information from the following parts via a multi-pin plug: From the Hall sensor in the...

Preliminary checks of the Monomotronic injection system
Procedure The control unit cannot be tested at home. In practice, it very rarely fails. Sensors, switches and plugs break much more often, so if there is a...

Malfunctions and self-diagnosis of the Monomotronic injection system
Detected faults are stored in the control unit's memory. When servicing in the workshop, the fault store (memory) is queried. This is done using a special...

Checking the elements of the Monomotronic injection system
Disconnecting the injection system connector cover Remove the cover over the waterproof housing in the engine compartment. Press the locking clip and...

Adjusting the idle speed and CO content of the Monomotronic injection system
These adjustments are unnecessary if there is an injection system, since this task is performed by the control unit. Only in case of doubt is the idle speed...

General structure of the KE-III-Jetronic fuel injection system
There are various modifications of injection systems based on the principle of the K-Jetronic system and installed on various engines. The KE-III-Jetronic...

Functioning of the KE-III-Jetronic fuel injection system
Only the differences from the mechanical system are described here. Launch After starting the engine, an increased amount of fuel is supplied for a few seconds...

Self-diagnosis of faults in the KE-III-Jetronic injection system
Unfortunately, it is impossible to independently detect many faults in the injection system, since this requires deep knowledge of the subject, as well as the...

Search for faulty components of the KE-III-Jetronic injection system
If you have any doubts about the serviceability of any part, you can check it. Checking the injectors Switch off the ignition as described in the relevant...

General description and safety precautions when working with the Motronic fuel injection system
The Motronic fuel injection system is an electronic system with a pre-programmed range of injection conditions, an ignition system controlled by the above...

Operation of the KE-III-Jetronic injection system
Although there is little work that can be done on the injection system, it is worth briefly mentioning the main parts and how they work in the system. the...

Possible malfunctions of the KE-III-Jetronic injection system
The injection/ignition systems are equipped with a fault diagnostic system. This means that any faults that occur are diagnosed and stored in the memory. This...

Work on the KE-III-Jetronic injection system
The work described can be performed with or without measuring instruments. Checking the pressure regulator To accurately measure the fuel pressure, a special...

Throttle actuator of the KE-III-Jetronic injection system
Basically, the throttle actuator is quite sensitive. When working in the engine compartment, you need to make sure that the "gas" rod does not break. Although...

Technical characteristics of the KE-III-Jetronic injection system

General structure of MPI and MPFI fuel injection systems
Basic Elements of MPI and MPFI 1 Battery 2 Gas cable 4 Brake fluid reservoir 5 Expansion tank cap 6 Fuse box 7 Power steering pump reservoir 8 Windscreen...

Precautions for MPI and MPFI injection systems
When working with the fuel system, it is very important to ensure safety. Safety can be ensured by following these rules: To avoid the possibility of fire and...

Measuring the pressure in the fuel line of the MPI and MPFI injection system
The multi-point fuel injection system uses electric injectors. Using electrical tools VW 1318 or similar pressure sensor 17 bar), connect the sensor to the...

Fuel injector of MPI and MPFI injection system — removal and installation
6-cylinder engines Disconnect the wire from the negative battery terminal. Relieve the fuel pressure. Remove the right and left support brackets, then the air...

Checking the injectors of the MPI and MPFI injection system
Checking resistances Disconnect the injector plug (1-3). Between the injector contacts, use an ohmmeter (2) to measure the resistance. The required value is 15...

Technical characteristics of MPI and MPFI injection systems

Operating principle of turbocharger of MPI and MPFI injection system
1 Activated carbon filter 2 Ventilation line from the fuel tank 3 Check valve for activated carbon tank 4 Exhaust-driven turbocharger 5 Fuel pressure regulator...

Malfunctions of the turbocharger of the MPI and MPFI injection system
If the turbocharger is not working properly, this can be determined by a loss of power or failure to reach top speed, assuming the fuel injection system is...

Removal and installation of turbocharger of MPI and MPFI injection system
As is known, the engine after a long trip at high speed should not be turned off immediately, but allowed to idle for a while. The reason for this is as...

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100(C4, 1990-1994)

100(C4, 1990-1994, petrol)

100(C3, 1982-1990)

100(C3, 1982-1990, petrol)

100(C3, 1982-1990, diesel)