What are the reasons for the high idle speed when the car is warm?

[McJuliet]

The reasons for the high idle speed when the car is warm are: excessive fuel injection, excessive air intake during idle, and incorrect engine control signals. The method to warm up the car is: after starting the vehicle, let it idle for 1 to 2 minutes to allow the engine coolant to reach normal temperature, then you can drive. Solutions for high idle speed: 1. Adjust or replace the throttle position sensor; 2. Clean or replace the idle control valve, and use a decoder to perform a basic idle speed setting; 3. Find the leak, reseal or replace the relevant components; 4. Check the timing marks and readjust the valve timing according to the standard; 5. Clean and check the fuel injection quantity of each injector and ensure there is no blockage or leakage; 6. Replace the three-way catalytic converter; 7. Remove carbon deposits on the EGR valve or replace the EGR valve.