What Causes Obvious Steering Wheel Vibration When the Air Conditioning Is On?
2 Answers
Opening the air conditioning causes obvious steering wheel vibration due to a dirty throttle valve, which affects the engine. Car air conditioning refers to the air conditioning device installed in a vehicle, capable of cooling, heating, ventilating, and purifying the air inside the cabin. It provides a comfortable riding environment for passengers, reduces driver fatigue, and enhances driving safety. The throttle valve is a controllable valve that regulates air intake into the engine, available in traditional cable-operated and electronic types. After entering the intake pipe, the air mixes with gasoline to form a combustible mixture, which then burns to perform work. It connects to the air cleaner at the top and the engine block at the bottom.
When the air conditioning is turned on, the steering wheel shakes violently. From my experience in car repair, I've found this issue to be quite common. The main cause is usually aging or deformation of the engine mounts or rubber mounts. When the AC is turned on, the compressor increases the engine's workload, and the old mounts can't absorb the vibrations, which then transfer to the steering wheel. Problems in the ignition system can also lead to this situation, such as worn-out spark plugs or faulty ignition coils, causing unstable ignition under high load and making the engine shake more severely. A loose or worn compressor belt can also worsen rotational imbalance. Additionally, issues with the idle control system can cause fluctuations in idle speed when the AC suddenly increases the load, resulting in steering wheel vibrations. I recommend first checking the mounts and belts—simple replacements can often fix the problem. Don't delay, as it could lead to greater safety risks or increased fuel consumption. Regular maintenance of these components can prevent shaking and ensure smooth and safe driving.
