Injection KE -III-Jetronic and KE-Motronic Audi 100 C4, petrol
Operating principle
The original form of this injection system, K-Jetronic, worked purely mechanically on the principle of "a lot of intake air - a lot of fuel". And such simple...
The original form of this injection system, K-Jetronic, worked purely mechanically on the principle of "a lot of intake air - a lot of fuel". And such simple...
Various modifications
The 4-cylinder engine with an output of 85 kW (AAD) developed in June 1992 is equipped with the KE-Motronic injection system, which in its control unit...
The 4-cylinder engine with an output of 85 kW (AAD) developed in June 1992 is equipped with the KE-Motronic injection system, which in its control unit...
Basic elements
To better understand the full functioning of our injection system, it is first necessary to clarify the most important details and concepts. Throttle valve...
To better understand the full functioning of our injection system, it is first necessary to clarify the most important details and concepts. Throttle valve...
Operating procedure
Interaction of constituent elements Starting: The vacuum created by the engine's intake pistons lifts the shut-off valve in the air flow meter. This causes the...
Interaction of constituent elements Starting: The vacuum created by the engine's intake pistons lifts the shut-off valve in the air flow meter. This causes the...
Lambda regulation
The catalytic converter can only function properly if the air-to-fuel ratio is close to 1, which corresponds to a fuel/air ratio of 14.7/1. To ensure that this...
The catalytic converter can only function properly if the air-to-fuel ratio is close to 1, which corresponds to a fuel/air ratio of 14.7/1. To ensure that this...
Malfunctions and self-diagnosis
The injection system control unit can recognize and record in memory some of the faults that occur during engine operation, and the memory can contain records...
The injection system control unit can recognize and record in memory some of the faults that occur during engine operation, and the memory can contain records...
Do-it-yourself repair
Unfortunately, numerous injection system checks cannot be carried out at home due to the lack of necessary control and measuring devices. However, a certain...
Unfortunately, numerous injection system checks cannot be carried out at home due to the lack of necessary control and measuring devices. However, a certain...
Visual inspection
First, check the air ducts for leaks! You need to check all the hoses - from the thick air intake sleeve to the thin vacuum hoses. Are the seals under the fuel...
First, check the air ducts for leaks! You need to check all the hoses - from the thick air intake sleeve to the thin vacuum hoses. Are the seals under the fuel...
Checking individual elements
Note: When performing all work on the KE-III-Jetronic injection system, you must remember that high pressure is present in the fuel supply system even long...
Note: When performing all work on the KE-III-Jetronic injection system, you must remember that high pressure is present in the fuel supply system even long...
Troubleshooting the injection system
In the following sections, we have looked at troubleshooting options that do not require any special tools or measuring devices at home. If after reading our...
In the following sections, we have looked at troubleshooting options that do not require any special tools or measuring devices at home. If after reading our...
Removal of components
For many components of the injection system, no additional descriptions of disassembly are required. Where explanations are necessary, you will read them in...
For many components of the injection system, no additional descriptions of disassembly are required. Where explanations are necessary, you will read them in...
Idle mode check and exhaust gas analysis
The Audi is equipped with automatic idle speed control. There is no adjustment screw - so there is nothing to adjust. If the idle speed is out of whack, it is...
The Audi is equipped with automatic idle speed control. There is no adjustment screw - so there is nothing to adjust. If the idle speed is out of whack, it is...
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