The lack of engine cylinders cause (Dieselpartsworld) 2016-02-28    

The lack of engine cylinders caused by idling fault phenomenon
Four cylinder engine idle speed range from 500 to 800r/min between the idling
The lack of engine cylinder idling fault cause analysis
This fault should focus on checking whether the engine is 1 cylnder cylinder.
Due to the engine with one cylinder misfiring, leading to idle speed dropped to 500r / min. Subsequently, idle speed control system open idle speed step motor, the idle speed rose to the lower limit of the four cylinder engine normal idle speed 800r / min, the idle speed control system exit. The idle speed again to 500r/min, the idle speed control stepper motor system open again, so repeatedly, then there is 500 ~ 800r/min, the idling.