The idle speed and the amount of CO in the working mixture are regulated electronically and cannot be checked and adjusted without using the fault recorder. Idle speed can be measured with a special tachometer. Idle speed adjustment must be carried out only at the service station, if they do not correspond to the norm.
To correctly measure the idle speed, follow these recommendations:
- warm up the engine to its operating temperature. It must be at least 80°C;
- turn off all electrical consumers;
- turn off the air conditioner, if any;
- the exhaust system must be in good condition;
- measure the proportion of CO using a special device. The connection point for the CO meter is located next to the throttle body and is integrated into the downpipe. The permissible share of CO is from 0.3 to 1.2%.
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