What to Do When There's Abnormal Noise Upon Releasing the Accelerator?

[LaEverett]

When abnormal noise occurs upon releasing the accelerator, you should first check whether it is due to a cold start, inappropriate engine oil, or a backfire fault in the engine. Here are the detailed explanations: 1. Abnormal noise during cold start: When starting a cold engine, the oil pump cannot immediately establish oil pressure, causing insufficient lubrication of the valves and resulting in abnormal noise. After the car has been parked for a long time, the engine oil flows back to the oil pan. During a cold start, the oil pump cannot immediately establish oil pressure, especially in the upper part of the engine, leading to insufficient lubrication of the valves. The hydraulic lifters and mechanical rocker arms fail to operate properly, causing abnormal noise. Solution: Reduce the number of times the car is turned off. 2. Abnormal noise caused by inappropriate engine oil: If the engine oil viscosity is too high, it may not provide sufficient lubrication, leading to abnormal noise. Solution: Replace with the required gasoline.