The maintenance of EFI automobile system is urgent.

The maintenance cost is hard to say, and the situation varies from place to place, but now EFI is very common, so the cost should not be too high.

According to my experience, the main reasons for EFI fuel consumption are nozzle carbon blockage, throttle carbon blockage, air filter blockage or humidity. The oil on the piston can also cause the filter to be wet.

To put it simply, the principle of EFI is to replace oil and gas, that is, to mix oil and air into a mixture, and then inhale it into the cylinder for combustion, while EFI pressurizes the oil through the EFI nozzle (the pressure is very high), and then directly injects it into the cylinder for combustion through the nozzle, which is installed at the top of the cylinder.

I suggest you remove the throttle and clean it yourself. It's easy. Just connect the air filter. It is also easy to check the air filter. If it doesn't work, it will have to be repaired.