What Causes Engine Vibration When Turning on the Air Conditioning?
2 Answers
The reason the engine vibrates when turning on the air conditioning is: the throttle valve is dirty and should be cleaned promptly. Below are some precautions regarding using the car's air conditioning: 1. Placement and Replacement: Avoid placing items near the air conditioning intake to prevent blockage, which could hinder airflow in the system. The air purifier in the air conditioning system should be replaced regularly. Replace the deodorizing filter approximately every 3 months or every 5,000 kilometers driven. 2. Monitor Coolant Temperature: The air conditioning system should be used when the engine coolant temperature is normal. If the engine is under heavy load and causes the coolant temperature to rise excessively, stop using the air conditioning and only resume usage once the coolant temperature returns to normal.
Last summer, my car frequently experienced engine shaking when the air conditioning was turned on, making the whole car vibrate as if driving on a gravel road. I consulted a mechanic friend, who explained that when the AC compressor starts, the load increases significantly, and the engine power can't keep up with the idle speed demand, leading to intensified vibrations. Carbon buildup can worsen this issue because dirty fuel lines affect combustion efficiency. Later, I cleaned the throttle body and intake system myself, and the situation improved a lot. An aging alternator can also cause unstable voltage, making the car more prone to shaking when the AC draws more current. It's advisable to pay attention to regular maintenance, such as periodic fuel system cleaning and checking the battery condition. If the shaking persists, it's best to visit a professional shop to test the compressor or idle control system to prevent the problem from worsening and damaging other components. Older cars, in particular, require careful maintenance; otherwise, fuel consumption may spike, affecting daily driving. Remember, timely detection and repairs ensure your car remains reliable and durable.
