In 2008, the eighth generation Accord started, and the engine noise was particularly loud. Please give me some advice.

When a car-friendly vehicle starts, the engine will make a loud noise. Generally, it is because the engine has not reached the normal operating temperature. According to the signals detected by the temperature sensor and oxygen sensor, the on-board computer controls the throttle opening to be larger, and controls the fuel injector to inject more fuel, so that the engine speed is higher than the idle speed. At this time, the place where the engine needs lubrication has not been fully lubricated (the oil pump pumps oil).