What causes the rattling sound in the Vios exhaust pipe?

[VanBriella]

Here are the reasons for the rattling sound in the Vios exhaust pipe: Ignition system malfunction: The ignition system consists of the ignition coil and spark plugs, and if any of these components fails, the system will malfunction. If the ignition voltage increases or decreases, it can cause abnormal engine vibration and poor exhaust flow, resulting in a rattling sound from the exhaust pipe. Issues with the car's valves: When the valves are properly sealed, fuel burns completely, and excess waste is expelled. However, if the valves are not sealed correctly, waste inside the engine cannot be expelled, affecting the exhaust pipe and causing unusual sounds. Increasing the engine's RPM will naturally eliminate this phenomenon.