Car gasoline injection system Audi 80 B4

Fuel injection system Mono-Motronic
General description The AUDI 80 petrol engines have a fuel injection system through one nozzle under the throttle valve, developed by BOSCH and named...

Operation of the Mono-Motronic system
Starting a cold engine The electronic control unit of the fuel injection system receives information about the engine temperature from the coolant temperature...

Fuel injection system — check
It is impossible for a car enthusiast to perform all types of fuel injection system checks on their own due to the lack of the necessary control and measuring...

Idle speed and CO content in exhaust gases — check
Idle speed adjustment is not required for engines with the Mono-Motronic fuel injection system, because its adjustment, if necessary, is performed by the...

Gas cable — replacement
The gas cable, which is the drive from the accelerator pedal and the throttle valve, is very sensitive to bending. When working in the engine compartment, be...

Digifant fuel injection system
General description In terms of the accuracy of the air-fuel mixture supply, the fuel injection system through one nozzle under the throttle valve is inferior...

Functioning of the Digifant system
Starting a cold engine When starting a cold engine, the idle stabilization valve increases the intake air through a separate channel. At the same time, the...

Fuel injection system — check
It is practically impossible to check the Digifant fuel injection system yourself, because it requires, first of all, appropriate measuring instruments and a...

Injectors — removal and installation
1. Disconnect the vacuum supply hose to the brake booster from the intake manifold. 2. Disconnect the idle speed control valve together with the holder. 3....

Idle speed and CO content — check
Idle speed adjustment is not necessary on cars with the Digifant fuel system, because this system is "self-learning". This means that the electronic control...

Fuel injection system KE-lll-Jetronic
Petrol engines equipped with a fuel injection system take in and inhale clean air. The injection system mixes a certain amount of fuel into it. Fuel is...

Functioning of the KE-III-Jetronic fuel injection system
When the engine is started, the air flow meter shut-off valve is deflected. The distribution piston opens the holes for fuel movement to the injectors. When...

Fuel injection system KE-III-Jetronic — check
A car enthusiast is not able to perform the overwhelming majority of possible injection system checks on his own, because these checks must be performed using...

Idle speed and CO content — check
AUDI 80 cars with a five-cylinder engine have automatic idle speed control. It is not possible to adjust the idle speed. It can only be checked. If the test...

Multi-point fuel injection systems MPI and MPFI
General description The AUDI 80 with a 2.8 - liter six-cylinder engine has a multi-point injection system MPI. The abbreviation MPI is derived from the first...

Operation of the MPI/MPFI fuel injection system
When the engine is running, air is sucked into the cylinders as a result of the pistons moving. When the accelerator pedal is fully depressed, the engine sucks...

Fuel injection system — check
The electronic control unit is capable of recognizing approximately 30 faults in ignition and fuel injection system components. Messages about faults that have...

Idle speed and CO content — check
Six-cylinder engines have automatic idle speed adjustment. Manual idle speed adjustment is not possible. Engine operation in idle mode can only be checked. If...

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80(B4, 1991-1996)

80(B3, 1986-1991)

80(B3, 1986-1991, petrol)

80(B2, 1979-1986)