What is the reason for the increase in fuel consumption of nozzle and throttle?

The nozzle is badly worn. After cleaning, the injection diameter of the nozzle increases, and the fuel ejected per unit time increases, so the fuel consumption increases. But cleaning the throttle and nozzle will not lead to a sharp increase in fuel consumption. It may be caused by the hot weather and the long time of using air conditioning.

It is best to clean up the carbon deposit in the intake pipe and the carbon deposit in the valve, and use the computer to match and learn after the oil circuit is washed, otherwise the data read by the computer will still be the data before you wash it, and at this time you have washed it, but the computer parameters are still the same, so the fuel injection quantity will increase and the fuel consumption will increase.