Warm up the engine (oil temperature not less than 60°C), make sure that the idle switch and the coolant temperature sensor are in good technical condition.
Disconnect the air supply hose from the central injection unit. Start the engine at idle and check the fuel spray jet with the injector. Increase the engine speed to more than 3000 rpm, release the accelerator pedal sharply and make sure. that in this case the jet of atomized fuel is interrupted for a short time.
Passat B2 (1981-1988)
Passat B3 (1988-1993)
Passat B4 (1988-1996)
Passat B5 (1996-2005)
Passat B6 (2005-2010)
Checking the forced idle system
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