How to Deal with Idle Vibration When Turning on the AC in an Accord?

[JakeLee]

There are various reasons for idle vibration when turning on the AC in an Accord. Here are the specific causes and solutions: 1. Severe carbon buildup in the engine: When there is excessive carbon buildup inside the engine, the gasoline sprayed by the fuel injector during a cold start is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it more difficult to start. Regularly clean the fuel system, inspect the idle control valve, and clean the throttle body. 2. Ignition system malfunction: Spark plugs are wear-and-tear parts that require regular replacement. If excessive carbon buildup on the spark plugs or excessive ignition gap is found, they should be replaced. Additionally, the wiring should be checked. 3. Oil pressure issue: Simply replace the engine mount bushings.