电装喷油器喷油嘴DLLA156P889

喷油器滴漏或堵塞

故障分析：若喷油器有滴漏或堵塞现象，使其无法按照ECU的指令进行喷油，从而造成混合气过浓或过稀，使个别气缸工作，导致发动机怠速不稳。喷油器的堵塞引起的混合气过稀，还会使氧传感器产生低电位信号，AVL GK电脑会根据此信号发出加浓混合气的指令，如果指令调控，电脑会误认为氧传感器存在故障，并记忆故障代码。

诊断方法：用听诊器检查喷油器是否发出“咔叽咔叽”作动声或测量喷油器的喷油量，若喷油器无作动声或喷油量超出标准，喷油器即有故障。

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