5000CD Quattro Wagon (Canada) L5-2226cc 2.22L SOHC Turbo (MC) (1986)
COMPONENTS:
Switch unit (in main relay plate, socket No. 3)
Valve for deceleration cut-off (on air cleaner housing, behind fuel meeting unit) Temperature switch (in cylinder head at front left)
Switch (underneath the throttle valve)
FUNCTION:
The cutting-off of the fuel on deceleration takes place at:
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Coolant temperatures above 30°C
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Engine speeds above 1,200 rpm
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Throttle in idling position
In this operating condition the switch unit controls the deceleration cut-off valve which is then opened by vacuum. Auxiliary air then bypasses the air
flow sensor plate and plate sinks to the rest position.
When engine speed drops below 1,200 rpm the switch unit receives a speed singal from terminal 1 of coil. The deceleration cut-off valve closes and
allows the sensor plate to rise again.