As part of maintenance, adjustment of the idle speed, ignition timing and CO concentration is not carried out, since these parameters are continuously regulated by the electronic engine management system.
If, nevertheless, there is a deviation of the actual values of the parameters from the required ones, then the reason lies in the failure of the corresponding elements that need to be replaced. A qualified check of the engine management system is possible using a stroboscope or special diagnostic tools. Connect the strobe lamp according to the manufacturer's instructions. When the engine is idling, direct the strobe beam into a special window and check the position of the ignition mark.