Mercedes restoration - KE-Jetronic - Change the lower part of the air flow meter

Rough running of the engine, increased idle speed, engine draws in air.
This is often due to a defective lower part of the air flow meter.
Mercedes vehicles with KE-Jetronic, R107, W126, W124, W140, W201

An air flow meter is a component in an internal combustion engine that measures the amount of air entering the engine. This is important to control the air-fuel ratio and ensure optimal combustion.

False air in the KE-Jetronic is a problem where air gets into the injection system. This can lead to various problems, such as a rough idle, loss of power, increased fuel consumption or unclean combustion.

Causes for false air in the KE-Jetronic can be cracks or leaks in the intake or fuel lines. Leaky seals on the injection valves or on the air filter housing can also cause false air.

To remedy false air in the KE-Jetronic, it is important to identify and repair the leaks. This can be done by visual inspection or by using smoke tests. If there are cracks or leaks, the affected components must be replaced or repaired.
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Work on vehicles requires special expertise. Always commission an authorised workshop for repairs and maintenance. The articles shown here are in no way a substitute for specialist literature and are intended as suggestions and as a means of passing on information.
No liability is accepted for damage of any kind!

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