What Causes Engine Vibration When the Air Conditioning is On in a Ninth-Generation Accord?
2 Answers
The phenomenon of engine vibration can involve multiple factors, such as excessive carbon buildup in the intake system (including the throttle body and idle air control valve), poor fuel atomization from the fuel injectors, or suboptimal performance of the ignition system, which is primarily related to the working condition of spark plugs, high-voltage wires, and ignition coils. Below is a detailed introduction to the Accord: 1. Overview: The Accord (Accord) embodies Honda's innovative spirit and global-leading technology. The original tires equipped on the Accord are Michelin's ultra-high-performance Pilot Super Sport tires. 2. Other Features: It utilizes i-VTEC and an intelligent power management system, which can automatically switch between 3-cylinder and 6-cylinder operation modes based on actual road conditions. The use of high-strength transmission belts enables a wide gear ratio range, ensuring efficient transportation.
I've driven the ninth-generation Accord several times, and this issue is quite common. The main reason is that when the air conditioning is turned on, the compressor starts up and increases the engine load, causing it to operate unevenly at idle and shake. Specifically regarding the design of the ninth-generation Accord, it's likely an issue with the idle control system, such as a clogged idle control valve or the ECU not adjusting the RPM properly. Another possibility is aging or damaged engine mounts that can't absorb vibrations, or ignition system faults like worn spark plugs or aging ignition coils, which result in insufficient spark energy, making the engine shake more noticeably under the AC load. Fuel system issues, such as carbon buildup in the fuel injectors, can also cause an imbalance in the air-fuel mixture, worsening the shaking. It's recommended to first check if the engine mounts are cracked and inspect the spark plugs for any issues. If the shaking is severe, it's best to take the car to a shop for a computer diagnostic to avoid affecting the lifespan of other components.
