What is the reason why the exhaust pipe of Artz suddenly makes a sound?

The sudden abnormal noise of exhaust pipe caused by Pacific Auto Network may be caused by ablation or poor sealing of individual exhaust valves, poor sealing of individual intake valves, serious air leakage, carbon deposition on the joint surface of individual intake and exhaust valves and seat rings, no gap in individual valve angles, uneven adjustment of two idle metering holes of dual-chamber carburetor or one blockage.

The engine is not idling, swaying, accompanied by the "sudden" sound of the exhaust pipe, and even shows signs of flameout. As no specific vehicle type is specified, the possible reasons are as follows (under the condition of multiple emission standards):

1, tubing A, tubing blockage, poor patency, rail pressure, etc. B. The electric fuel pump is abnormal or the fuel filter is blocked or blocked for various reasons; C. Abnormal choke: It can be due to its own quality failure, or it can be due to various defects such as foreign body blockage, poor sealing and rubber ring aging.

2, air intake or idle speed control A, stepper motor, throttle body dirty or air leakage. Sensors such as air pressure, temperature and throttle position are abnormal, and the data is incorrect. B, too thin: the mixed gas is too thin or the fuel is too thin and other comprehensive problems. Check the air intake part, oil circuit, etc.

3. Presbyopia or cracking of the ignition wire leads to electric leakage and insufficient ignition intensity. Or installation problems lead to poor contact. Suggestion: Replace the original ignition wire.

(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)