Idle speed and CO content

Adjustment

1. Warm up the engine to operating temperature.

2. Turn off all electrical consumers.

3. Disconnect the radiator fan temperature sensor connector and close both contacts with a jumper to turn the fan on permanently.

4. Check ignition start setting.

5. Connect a tachometer to the engine (with the ignition off) and gas analyzer. On an engine with a displacement of 1.3 dm³, the gas analyzer is connected to the intake pipe in the engine compartment, which is located on the exhaust pipe and is closed with a plug.

6. Increase the engine speed to 3000 rpm and hold it for 30 seconds, and then turn the engine to idle.

7. Take instrument readings.



8. If the idle speed deviates from the norm, the screw for adjusting the amount of mixture (1) set the desired speed.

9. If the CO content deviates, remove the protective cap from the mixture quality screw (2), increase the engine speed to 3000 rpm and hold it for 30 seconds, and then turn the engine to idle and, turning the screw, set the required CO level.

10. When changing the idle speed, adjust them with the mixture adjustment screw.

Attention! It is possible to take instrument readings and make adjustments only after stabilization of the readings of measuring instruments.

11. In the absence of a gas analyzer, approximate adjustment of the quality of the mixture can be made as follows. With the engine running, turn the mixture quality screw inward until the idle speed begins to noticeably decrease, then unscrew the screw slightly in the opposite direction until the engine runs smoothly.