As soon as the idle speed drops below 700 rpm. for example, due to additionally switched on energy consumers, the double-port valve I increases the speed back. Valve II equalizes the speed when the air conditioner is on.
Valve I is controlled by the control device for increasing the speed, which is located on the additional relay board on the left under the switch panel in location 11 (KE-Jetronic). Valve II is activated when the air conditioning system is turned on.
Warm up the engine. The oil temperature should be around +80°C.
Connect the tachometer with the ignition off according to the instructions.
Start the engine and let it idle.
Turn off the air conditioner.
Valve test I
Turn on all electrical consumers (air conditioner stays off).
Screw in the idle speed adjusting screw. At 700 rpm valve I should open and the speed should increase.
Pinch hose -1- with pliers. RPM should drop.
Set the number of revolutions with the clamped hose using the adjusting screw 900 rpm.
Remove with pliers, the speed should increase to 1050 rpm.. then the valve closes and the speed drops to the required
Valve test II
Pinch hose -1- with pliers. The number of revolutions must not change.
Turn on the air conditioner and check. The number of revolutions with a pinched hose should drop.
Attention: Check the correct position of the hose connector. The larger hole must face valve II.
Visitor comments