Operating principle The original form of this injection system, K-Jetronic, worked purely mechanically on the principle «a lot of intake air - a lot of fuel». And such simple...
Various modifications Created by June 1992 4-cylinder engine with a power of 85 kW (AAD) equipped with the KE-Motronic injection system, which in its control unit controls the...
Essential elements In order to better understand the full functioning of our injection system, it is first necessary to explain the most important details and concepts. Throttle...
Operating procedure Interaction of constituent elements Starting: The vacuum created by the engine suction pistons lifts the check valve in the air mass meter. Due to this, the...
Lambda regulation The catalytic converter can only work correctly if the air ratio is close to 1, which corresponds to a fuel/air ratio of 14.7/1. In order to put this into...
Malfunctions and self-diagnosis The control unit of the injection system can recognize and record in the memory a part of the faults that occur during engine operation, and the memory store...
Self repair Unfortunately, numerous inspections of the injection system cannot be carried out at home due to the lack of necessary instrumentation. However, a certain...
Visual check First, check the air ducts for leaks! It is necessary to check all the hoses - from the thick sleeve of the air intake to the thin vacuum hoses. Are the seals...
Checking individual elements Note: When carrying out all work on the KE-III-Jetronic injection system, you must bear in mind that there is high pressure in the fuel supply system even long...
Troubleshooting in the injection system In the following sections, we've looked at troubleshooting options that don't require any special tools or gauges at home. If you, after reading our list of...
Removing components For many components of the injection system, no further disassembly descriptions are necessary. Where explanations are needed, you will read them in the...
Idle check and exhaust gas analysis Audi is equipped with automatic idle control. There is no adjustment bolt, so there is nothing to adjust. If the idle speed goes astray, it is simply checked....