What is the reason for a sudden loud bang from the engine while driving the Langdong?

[HannahLynn]

The sudden loud bang from the engine while driving the Langdong is caused by an excessive air-fuel mixture. Main issues causing the abnormal noise: This indicates that the air-fuel mixture is too rich (too much gasoline, too little air). In carburetor-equipped vehicles, the fuel injection is not controlled by a computer but by the throttle pedal. In some cases, excessive fuel enters the cylinder and is expelled before it can fully combust, leading to thick smoke emissions. This also suggests a high water content in the exhaust gases, where even after the engine has warmed up to normal operating temperature, thick smoke continues to be emitted. Solutions: Check for any damage to the engine block or cylinder head gasket, and inspect the fuel tank for water contamination. Refer to the vehicle's manual and strictly follow the manufacturer's guidelines for using the correct gasoline grade.