When the engine works, the exhaust muffler and a lot of smoke and issued a "pit, pit" shooting like sound, it is called the exhaust pipe blasting.

(1) the cause of the failure

(1) the excessive concentration of mixed gas is an important cause of the exhaust pipe firing. The mixture is too thick, resulting in incomplete combustion. The mixture of excess unburned gas and burning waste gas is mixed (a lot of them become carbon monoxide), so a lot of black smoke gas is discharged from the exhaust pipe. The combustible carbon monoxide in the muffler and exhaust gas mixed with air and high temperature (or in the blazing hot muffler) contact, caused by re combustion, gas expansion and issued a "pit, pit". The mixture too thick due to incomplete combustion will cause the cylinder cover (combustion chamber), the top of the piston and the spark plug fouling and other adverse consequences and will affect the performance of the engine.

Second, the ignition time is too late, the ignition sequence is disorderly and so on, which will cause the exhaust pipe to set up the gun.

The spark weak will also cause the exhaust pipe to release the gun, its characteristic: the A. has the regular cannon sound, the high speed is obvious and serious; the B. carburetor sometimes occurs the tempering phenomenon.

4. Individual cylinder will also produce exhaust pipe blasting when working poorly. Its characteristics are: A. engine jitter is serious and operation is not stable; B. Baotou beitu heavy duty accessory exhaust pipe is also accompanied by sudden and sudden noise and intermittent black smoke.

The pressure and temperature in the cylinder are too low, which is also the cause of the exhaust pipe firing. Its characteristics are: A. engine is not easy to start; B. engine has percussion when running; C. Baotou Bei Ben heavy truck accessories engine power is insufficient; D. sometimes "firing" and carburetor tempering phenomenon occurs.

(2) fault diagnosis and troubleshooting

(1) check and adjust the carburetor.

2. Adjust the timing of ignition.

(3) check the battery voltage, ignition coil, high pressure line and spark plug of the ignition system of Baotou North running heavy steam parts.

(4) troubleshooting the cylinder that does not work.

Eliminate the air leakage fault of the cylinder.