The choice of chips can only be consulted by an experienced refitting factory. One chip, one fuel supply program, smart readers will definitely think: If two or three are installed, what will be the result? That’s right, there used to be domestic refitting factories that installed two or three chips with different fuel supply modes on the same circuit board at the same time, and the driver can connect one externally to the switch in the car to choose the desired fuel supply mode at will. , just like switching the P gear, E gear, and S gear of an automatic transmission, to meet the needs of different situations of car owners. ECU computer programming This is a relatively professional item in the ECU system modification. The most familiar one in the domestic modification industry is the HALTEC computer. Through this computer, the owner can set the best fuel supply program according to the modification degree of the car engine and the measurement of the air-fuel ratio meter. That is, the basic injection program and various compensation injection programs mentioned above can be used on the laptop. Any changes. The biggest difference between it and the modified chip is also its biggest advantage. When the engine is changed or refitted in the future, if the original fuel supply program is not suitable, it can be solved immediately through the program modification.