Is it normal to lead the idle speed of 600 rpm?

The reasons for the low driving speed are as follows:

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2. Spark plugs caused by individual spark plug failures are too weak: with the extension of service time, carbon deposition will occur in automobile spark plugs. When carbon deposition is serious, the spark plugs on individual cylinders will be weak, which will affect the performance of the vehicle and lead to the phenomenon of low idle speed of the vehicle. It is recommended to clean or replace the spark plug in time;

3. Failure of fuel nozzle blocking the intake pipe: When the fuel nozzle of the automobile is blocked, the automobile will have oil supply pressure and poor fuel atomization, resulting in unstable or low idle speed of the automobile. When the automobile intake pipe fails, the proportion of mixed gas is out of balance, which may lead to excessive emissions and unqualified annual inspection of the automobile;

4. Related sensor failure: When there is a problem with the related sensor of the automobile, the automobile does not have the correct air-fuel ratio. Common faults of water temperature sensor, oxygen sensor and throttle position sensor lead to high fuel consumption and low idle speed.