How to refuse if the idle speed of the car is too low?

The reasons for the low idle speed of the car are: 1, oil storage in the throttle or carbon deposition in the throttle; 2. The air inlet is too dirty; 3. The spark plugs caused by individual spark plug failures are too weak; 4, idle speed control valve failure; 5. The fuel injector is poorly atomized or blocked; 6. Viscosity change of oil. The solutions to the low idle speed of the car are: 1, check whether there is oil or carbon deposit in the throttle; 2. Clean the air inlet; 3. Check the working condition of the spark plug; 4. Check whether the idle speed control valve is faulty; 5, check whether there is a problem with the syringe; 6. Change the oil in time. The reasons for the increase of automobile idle speed are: 1, and the idle switch is not closed; 2. Idle speed control valve is faulty; 3. Air inlet pipe leaks; 4. Wrong gas distribution phase; 5. The fuel injector leaks or is blocked; 6. The exhaust system is blocked.