What is the reason why Wang Yi sounds when the seven-and-a-half-generation Accord steps on the accelerator at idle speed to 2500 rpm?

Abnormal sound caused by excessive fit clearance refers to abnormal sound caused by wear of a certain part of the engine.

Abnormal engine cylinder-missing noise mainly refers to the abnormal operation of one or more cylinders of the engine. Abnormal engine knocking noise refers to the sound made when the vehicle starts knocking on the cylinder. Piston knocking noise refers to the abnormal noise generated when the piston swings or moves up and down in the cylinder, and its head or skirt collides with the cylinder wall and cylinder head. Idle speed is a working state of the car, which means that the engine runs in neutral, and the speed of the engine at idle speed is called idle speed.

Method of adjusting idle speed

Idle speed adjustment must be carried out under normal conditions, such as normal engine temperature, proper valve clearance, normal ignition system, good sealing of all pipelines, full throttle opening and tight throttle closing. When adjusting, first loosen the throttle opening adjustment screw to make the engine reach the lowest stable speed. Then screw in the idle speed adjusting screw with a screwdriver, and then slowly unscrew the idle speed adjusting screw when the engine is about to stall, so that the engine can run smoothly and reach a high speed.

Then loosen the throttle opening adjustment screw to make the engine speed as low as possible. Then adjust the idle adjustment screw to increase the engine speed. Repeat this process until the throttle opening is minimum and the engine runs at the lowest stable speed. Finally, increase the speed and suddenly close the throttle, so that the engine can still turn without stalling.