Gasoline engine injection system Mercedes A-Class (W168)

General description and precautions
The electronic engine control unit regulates the amount of fuel supplied and controls the ignition system. Electronic engine control systems have their advantages, which...

The principle of operation of the fuel injection system
Fuel is sucked from the fuel tank by an electrically driven fuel pump and fed through a fuel filter installed in the fuel tank into the distribution line. The pressure...

Fuel injectors — checking
Leaky fuel injectors make hot engines difficult to start, cause the engine to run rough, and cause misfires. 1. Start the engine and let it idle. 2. Use a stethoscope...

Fuel distribution line — removal and installation
Removal When working with the fuel supply system, the following rules of cleanliness and safety precautions must be carefully followed: No open flames or sparks near the...

Engine control unit emergency program function
Accelerator Pedal Position Sensor Failure In this case, the control unit switches to receive a signal from the spare (duplicating) sensor. The maximum throttle opening...

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