Why does the nozzle of Wuling Glory van keep running with gasoline and not atomizing? Is it a quality problem?

First of all, the oil pressure of the gasoline pump system is about 300kp. When the engine is working, the computer reasonably controls the four fuel nozzles to open instantly (about 3 milliseconds when idling). Because there is a high pressure of about 300kp inside when the fuel nozzle is opened, the sprayed gasoline is foggy. Poor atomization of the nozzle is caused by valve damage or excessive dirt in the nozzle. If the valve is damaged, resulting in poor atomization of the nozzle, just replace the valve.

If there is too much dirt in the nozzle, it is necessary to clean the nozzle. The combustion temperature of benzene aromatic hydrocarbons used to clean nozzles in the cylinder is much higher than that of gasoline. It's not good for the car to go to the sauna if you have nothing to do. The maintenance focus of EFI car is still on the accelerator, and there is a lot of putty. Buy a better carburetor cleaner, remove the air filter, start the fire and constantly change the throttle size, and spray it into the air pipe. This can not only clean the throttle, but also clean the induction hotline of the air flow meter.

Do not remove and clean the throttle valve. This place, like a carburetor, is a process of constant wear and tear. Even if worn, the two worn surfaces are still closely matched. If it is not assembled correctly after disassembly, it will change its position, but it will not close tightly.

Extended data

Check the fuel injector and back pressure valve.

Due to urban traffic congestion, cars are often at low speed and idle speed, which will aggravate the formation and accumulation of these deposits. The deposits in the fuel system are very harmful. Deposits will block the needle valve and valve hole of the injector, affect the working performance of precision parts of the EFI system, and lead to the decline of power performance.

Deposits will form carbon deposits in the intake valve, which will lead to the untidy closing of the intake valve, unstable idle speed of the engine, increased fuel consumption and deterioration of exhaust emissions; Deposits will form hard carbon deposits on the piston crown and cylinder head, which is easy to cause engine failure due to its large heat capacity and poor thermal conductivity. In addition, it will shorten the service life of the three-way catalyst.

The work of injector plays an important role in the power of each engine. Due to poor fuel, the injector does not work normally, resulting in serious carbon deposition in the cylinder; The accelerated wear of cylinder and piston ring will cause unstable idle speed, rising fuel consumption, weak acceleration, difficult start-up, excessive emission, complete blockage of injector and damage to engine.