What Causes Engine Vibration When Turning on the Air Conditioning?

[AngelinaFitz]

Reasons for engine vibration when turning on the air conditioning: 1. The air conditioning compressor malfunctions, causing excessive pressure during operation, which leads to vibration issues and subsequently affects the engine, causing resonance vibration. It is necessary to have it inspected and repaired at a repair shop or 4S store; 2. The throttle valve is clogged, affecting the engine's air intake function, leading to poor ventilation and abnormal engine vibration. The throttle valve needs to be inspected and cleaned; 3. Severe engine carbon buildup is the main cause of vibration. If carbon deposits are not effectively cleaned, they will affect normal fuel combustion, resulting in abnormal engine vibration. Timely cleaning of engine carbon deposits is required.

[OliveMarie]

My car shakes badly when the AC is turned on, which is really annoying. I remember the last inspection showed that starting the AC increases the engine load, causing unstable idling, as if the engine is protesting the extra work. Common causes include worn-out spark plugs, a dirty air filter, or too much carbon buildup in the throttle body, making the engine struggle to keep up. I realize I've been too lazy with regular maintenance, letting small issues pile up into big problems. I tried cleaning the throttle body myself with some household cleaner, and it worked fairly well, but professional repairs are always more reliable. Remember, don't let the shaking get worse, or the ride will become bumpy and unsafe. Regular maintenance is key—now I check the fuel system monthly to keep the engine running smoothly.

[LolaDella]

I've also experienced engine shaking when the AC is on. As a car owner with ten years of experience, this usually indicates that the engine can't handle the load. When the AC is turned on, the compressor starts and draws some power, causing the engine speed to suddenly drop. If the idle controller is faulty or the belt is too tight, shaking is likely to occur. My suggestion is to first check if the spark plugs are firing properly or if there are any aging wires. You can try replacing the parts yourself, but be careful not to damage any components. Safety first—if the shaking becomes obvious, pull over immediately and don't force it. Last time, I almost had an accident. Ignoring this issue for a long time will shorten the engine's lifespan, so I do a simple cleaning inside and outside the car every week to ensure everything is normal. Going to a professional shop for a thorough check is the last resort—don't skimp on small expenses to avoid bigger troubles.

[Taylor]

As a new driver, when I press the AC button, the engine shakes violently—it's terrifying! The reason might be that the AC system puts a heavy load on the engine, causing insufficient power output, especially when the RPM can't keep up. At a glance, it could be a loose belt or a faulty compressor, leading to uneven power distribution. Sometimes, unstable tire pressure can also amplify the vibrations. It's best to ask a knowledgeable friend to take a look before the issue worsens.