What Causes Excessive Engine Vibration?
2 Answers
Excessive engine vibration can be attributed to the following reasons: 1. Engine misfire: This primarily refers to one or more cylinders in the engine not functioning properly; 2. Worn or loose engine mounts: Engine mounts are the rubber blocks placed between the engine and the vehicle frame; 3. Fuel system malfunction: Using an incompatible fuel grade can lead to reduced engine output and power; 4. Carbon buildup issues: Vehicles inevitably face carbon buildup, which includes carbon deposits in the cylinders, throttle body, spark plugs, and intake system. Excessive carbon buildup inside the engine can negatively impact ignition energy, air intake efficiency, and the air-fuel mixture ratio.
I've been repairing cars for over ten years, and the most common cause of significant engine vibration is worn or aged engine mounts. When those fail, the vibration transfers directly to the chassis, making driving extremely uncomfortable. Another potential culprit is a dirty fuel system, such as clogged fuel injectors, where uneven fuel spray leads to unstable combustion. Spark plugs that have been used too long or faulty ignition coils can also cause similar issues, as can a dirty air filter affecting air intake. Some cars have internal engine problems, like cylinder misfires or balance shaft malfunctions. Severe vibration not only makes the ride bumpy but can also damage the transmission and chassis over time. I recommend getting it checked at a professional auto repair shop immediately—replacing mounts or cleaning the fuel system usually solves the problem. Regular maintenance is key; don't wait until major issues arise.
