What Causes Severe Car Vibration?

[DiHolden]

Severe car vibration causes: Incomplete fuel combustion leads to insufficient power and low ignition energy. During startup, especially when fuel and lubricant temperatures are low, more throttle is required to meet power demands. Over time, the electrode gap of spark plugs gradually increases, resulting in decreased ignition energy and poor fuel atomization, which causes vehicle vibration. Aging ignition coils, deteriorated spark plug high-voltage wires, or electrical leakage can also reduce ignition energy. There are many reasons for cold start and warm start vibrations, including not only incomplete combustion but also abnormal engine coolant temperature, low cylinder pressure, clogged fuel injectors, etc. If your car exhibits startup vibration, it's recommended that owners promptly visit a 4S shop for inspection and repair.