Loader engine noise, there is a buzzing sound?  First of all, we can adjust the idle stabilizer. If there is still a sound, it may be that the nozzle is stuck or the cylinder is missing.  The nozzle stuck is caused by the poor quality of diesel oil with large moisture content or the bad filtration of diesel filter element. The reason for the lack of cylinder of the engine is mainly from the ignition system and fuel system.  The ignition coil and spark plug of the ignition system fail or the spark plug accumulates too much carbon to cause abnormal work. The fuel injection nozzle of the fuel system has carbon accumulation, and the plug of the fuel injection nozzle causes the engine to lack cylinder.