Abstract: The poor acceleration fault of gasoline electronic fuel injection(EFI) engine is one of the key points and difficulties for automobile maintenance personnel to diagnose and eliminate. This paper analyzes and sorts out the influencing factors of the oil circuit, circuit, gas circuit and machinery that cause the poor acceleration of gasoline EFI engine, explores and summarizes the diagnosis methods and ideas combined with years of practical experience, and analyzes and applies them with cases, so as to provide reference for engine troubleshooting.

Key words: Gasoline EFI engine; Poor acceleration; Failure diagnosis

摘要： 汽油电喷（EFI）发动机加速不良故障是汽车维修人员诊断和排除的重点和难点之一。 文章通过对造成汽油电喷发动机加速不良的油路、电路、气路及机械等几个方面的影响因素 进行分析和梳理，结合多年的实践经验，探索和总结诊断方法和思路，并用案例加以解析， 以期对发动机的故障排查提供借鉴。

关键词: 汽油电喷发动机；加速不良；故障诊断