Warm up the engine (oil temperature not less than 60°C), make sure that the idle switch and coolant temperature sensor are in good technical condition.
Disconnect the air supply hose from the central injection unit. Start the engine at idle speed and check the fuel spray jet from the injector. Increase the crankshaft speed to more than 3000 rpm, release the accelerator pedal sharply and make sure that the spray jet of fuel is interrupted for a short time.
Checking the forced idle system (VW Passat B4)
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The text has been checked: Kolesnikov Artem
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Passat B6
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