What is the situation with severe engine shaking in the Buick Excelle?
1 Answers
Detailed information about severe engine shaking in the Buick Excelle is as follows: 1. Engine misfire. Engine misfire mainly refers to one or more cylinders of the engine not working properly. Common symptoms include: intermittent exhaust gas flow with noticeable shaking of the exhaust pipe, where the engine vibration can be clearly felt, sometimes accompanied by a sputtering sound. This is mostly related to ignition coil failure. 2. Aging or loosening of engine mounts. Engine mounts are rubber blocks placed between the engine and the frame. Their function is to reduce the vibration and shock generated during engine operation and to secure the engine in place. Once these mounts age or loosen, the engine shaking will become abnormally severe. It is recommended to replace the engine mounts, after which the effect will be significantly reduced. 3. Carbon buildup issues. Cars inevitably face carbon buildup problems, which include cylinder carbon buildup, throttle carbon buildup, spark plug carbon buildup, and intake carbon buildup, among others. When there is excessive carbon buildup inside the engine, the car's ignition energy, intake efficiency, and air-fuel mixture ratio will be affected, leading to unstable power output and shaking during idling and acceleration. It is recommended to perform an engine cleaning service at a 4S shop. 4. Fuel system failure. Using incompatible fuel grades (e.g., using 90 octane instead of 93 octane) can reduce the car's output power and performance; or if the fuel tank vent is blocked, the fuel tank switch, fuel filter, or the fuel line between the fuel tank and the carburetor is partially blocked, the required fuel supply cannot be met, leading to a lean air-fuel mixture and engine shaking. It is recommended to use the fuel grade specified by the manufacturer and perform regular maintenance.
