The invention discloses an 
automotive engine individually-customized 
system and method. The method comprises the following steps of: S1, selecting an engine customized target and inputting customized information; S2, delivering the customized information to an engine customized 
database server; S3, generating engine ECU (
electronic control unit) flash data correspondingly by the engine customized 
database server; and S4, calling the engine ECU flash data by utilizing an automobile fault diagnosis instrument, and flashing the engine ECU flash data into an engine ECU. The 
automotive engine individually-customized 
system and method provided by the invention can finish individual customization of an engine by utilizing an engine customized function of automobile 
diagnostic equipment, the management and application of an engine customized 
database are also supported, the engine individual customization procedure and data are subjected to storage and 
statistical analysis, and the equipment application efficiency is furthest improved; and meanwhile, a safe and reliable engine individually-customized 
system is established so as to effectively meet individual requirements of car users, 
car driving pleasure is improved and the requirement of saving 
oil consumption is met by customizing the engine, and the problem that an engine customizing technology is hard to popularize can be solved.