What is the reason for severe shaking of the Changan CS35 when the air conditioning is turned on?
2 Answers
The reasons for severe shaking of the Changan CS35 when the air conditioning is turned on are throttle valve blockage, excessive carbon buildup, and aging of the shock absorption system. Details are as follows: Throttle valve blockage: Throttle valve blockage affects the engine. If the air conditioning is turned on at this time, it will increase the engine idle load, resulting in vehicle shaking. The solution is to clean the throttle valve. Excessive carbon buildup: Severe carbon buildup in the engine cylinders can cause spark plug blockage or throttle valve blockage. Once the air conditioning is turned on, it will directly lead to shaking during idle. The solution is to clean the engine. Aging shock absorption system: The shock absorption system is mainly responsible for filtering the vibrations generated during engine operation. If there is an issue with the shock absorption system, these vibrations will be directly transmitted to the steering wheel and the interior of the vehicle, affecting driving. When the engine is idling, turning on the vehicle's electrical systems can also easily cause shaking. The engine increases its load due to the activation of electrical systems, causing the idle speed to drop. To compensate for the shaking caused by the drop in idle speed, the engine will automatically increase the RPM. Therefore, when electrical systems, especially the air conditioning, are turned on, the engine often shakes. This shaking is likely caused by aging shock absorbers and requires timely replacement.
When the air conditioning is turned on, the car shakes violently. I have been driving a Changan CS35 for several years and have encountered similar issues. This may be because the engine's RPM becomes unstable under additional load. For example, when the air conditioning compressor starts, it consumes more power. If the engine itself is not strong enough or the idle control is poor, it can easily cause shaking. Common causes include excessive carbon buildup in the throttle body obstructing air intake, aging spark plugs affecting ignition, or insufficient fuel supply. After my last inspection, I found that the spark plugs were severely worn, and replacing them significantly alleviated the problem. Additionally, an unbalanced air conditioning compressor or loose mounting screws can easily transmit vibrations to the car body. I recommend checking whether the idle speed is normal first—if it’s stable without the air conditioning on, then focus on inspecting the air conditioning-related components. If the issue persists, it’s safer and more reliable to get a professional diagnosis at a repair shop, as persistent shaking may affect driving stability. Regularly cleaning carbon deposits and replacing ignition components can prevent such problems. Keeping the car in good condition ensures a more confident and worry-free daily driving experience.
