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Checking the fuel injection system
The fuel injection system on their own, you can check only the main circuits. If normal operation of the engine is broken, first check the condition of wiring and connectors. Check the condition of the air filter element, and the state and the electrode gap of the spark plugs. Check the patency of the crankcase ventilation hose and adjust the accelerator cable. If the engine still works unstably, check the engine compression. If there is a suspicion of bad work of a fuel atomizer, clean it. If the engine still works unstably, check the ignition system components. If the problem still persists, check the fuse and the state of electrical connectors and wiring. On the electrical connectors should not be melted contact, moisture, corrosion, dirt, and other damage. After the self-check address on specialized station "Volkswagen" for the diagnosis of the fuel injection system with special equipment.
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