What is the high idle speed of the car?

The reasons for the high idle speed of cars are as follows:

1. The throttle is stuck and not closed correctly.

2, additional air valve failure.

3. Idle speed control valve is faulty.

4. The water temperature sensor is faulty.

5, crankcase forced ventilation valve failure.

6. Air leakage in the air intake system.

7, generator charging voltage is too low.

Related information and solutions:

1. Pull the throttle rocker arm in the closing direction, and the idle speed of the engine can be reduced to normal speed, so the throttle is stuck and cannot be closed loosely. It is necessary to replace the cable and disassemble and clean the throttle body.

2. Replace the additional air valve.

3. Check the action sound of idle speed control valve. If there is no action sound, the control valve is faulty and needs to be replaced.

4. Input the low water temperature signal to the computer.

5. Crankcase forced ventilation valve.

6. Find the leakage point, seal it or replace relevant parts.

7. Overhaul the engine.