Why does the Corolla idle shake?

[Jenna]

Vehicle idle shaking refers to noticeable body vibration when starting the vehicle or keeping the engine running while stationary. The causes and specific solutions for Corolla idle shaking are as follows: 1. Cause one: The throttle body is dirty or the fuel injectors have excessive carbon deposits, causing gasoline to be largely absorbed by the carbon deposits and resulting in an overly lean air-fuel mixture during cold starts. Solution one: Clean the fuel system and check the idle air control valve for carbon deposits, cleaning it promptly if present. 2. Cause two: Ignition system issues. Solution two: Inspect the working condition of spark plugs, high-voltage wires, and ignition coils, replacing spark plugs in a timely manner if necessary.