What Causes Excessive Vibration When the Car Air Conditioner is On?
1 Answers
Causes of excessive vibration when the car air conditioner is on are as follows: 1. Engine misfire: An engine misfire mainly refers to one or more cylinders not functioning properly. Common symptoms include intermittent exhaust gas flow, severe shaking of the exhaust pipe, noticeable engine vibration, and sometimes accompanied by a sputtering sound. This is often related to ignition coil failure. 2. Worn or loose engine mounts: Engine mounts are rubber blocks placed between the engine and the car frame. Their purpose is to reduce vibration and provide cushioning during engine operation, as well as to secure the engine. Once these mounts become worn or loose, the engine vibration will become significantly worse. Replacing the engine mounts can greatly reduce this issue. 3. Carbon buildup: Cars always face the issue of carbon buildup, which includes carbon deposits in the cylinders, throttle, spark plugs, and intake system. When there is excessive carbon buildup inside the engine, the ignition energy, air intake efficiency, and air-fuel mixture ratio are affected, leading to unstable power output and vibration during idling and acceleration. It is recommended to have the engine cleaned at a 4S shop. 4. Fuel system malfunction: Using an incompatible fuel grade (e.g., using 90 octane instead of 93 octane) can reduce the car's power output and performance. Alternatively, blockages in the fuel tank vent, fuel tank switch, fuel filter, or the fuel line between the tank and the carburetor can restrict fuel supply, resulting in a lean air-fuel mixture and engine vibration. It is recommended to use the fuel grade specified by the manufacturer and perform regular maintenance.
