Why does the Audi Q5L experience intermittent idling vibration?

[Jaxson]

Reasons for Q5L vibration: 1. Excessive carbon deposits If there is severe carbon buildup in the engine cylinders, it can cause spark plug blockage and valve blockage, directly leading to vehicle vibration during idling. If the car's acceleration performance has significantly deteriorated and the vibration persists, consider performing an engine cylinder cleaning. 2. Fuel system malfunction Unstable fuel pressure can easily cause inconsistent mixture concentration, not only resulting in vibration but also causing unstable idling. First consider replacing the fuel filter, as prolonged use may clog the filter element. Then check the fuel pressure bypassing the fuel filter - if abnormal, it may indicate a fuel pump issue. 3. Engine mount aging This is also a common cause of vibration. If the engine vibration worsens progressively but the power output doesn't weaken accordingly, consider whether it's an engine mount problem. 4. Misfiring This is the most common cause of engine vibration, perhaps even the most frequent one. The problem lies with the engine ignition coil or spark plugs. If the ignition coil malfunctions or the spark plugs fail to fire for some reason, the vehicle will experience vibration.