在维修电喷发动机时经常会遇到这样的现象:清洗过节气门体和怠速控制阀后,发动机怠速转速反而会变得更加不稳定,有时会“游车”(发动机转速忽高忽低),有时会在1200 r/min～2000 r/min 居高不下,往往令修理人员头痛。下面笔者对造成上述现象的原因及排除方法进行分析,不当之处请指正。电喷发动机怠速进气系统是由基本怠速进气和怠速控制阀控制进气两部分组成。基本怠速进气是怠速 In the maintenance of EFI engines often encounter such a phenomenon: After cleaning the throttle body and the idle speed control valve, the engine idle speed but will become more unstable, sometimes “travel” (engine speed fluctuated ), Sometimes high at 1200 r / min ~ 2000 r / min, often causing headache to the repairer. The following author of the reasons for the phenomenon and the reasons for the exclusion analysis, please correct me wrong. EFI engine idle intake system is controlled by the basic idle into the air intake and idle speed control valve composed of two parts. The basic idle intake is idling