Reasons for Subaru Idle Vibration After Overhaul?

[HarrisonMarie]

Subaru idle vibration after overhaul may be caused by carbon deposits on the throttle idle motor. It is necessary to clean the throttle carbon deposits, which can be done at a maintenance point. Idle refers to the operation of the engine without load, only overcoming the friction resistance of its internal components, without external power output. The minimum speed to maintain stable engine operation is called idle speed, which is one of the five basic operating conditions of the engine. When adjusting the idle speed, the speed should not suddenly increase or decrease, otherwise it will cause early wear of the engine. Idle speed can be adjusted by changing the throttle opening size and idle fuel supply. Generally speaking, the best idle speed is the minimum speed at which the engine does not vibrate within the idle range and has good acceleration performance. The phenomenon of idling is that the car is stationary while the engine is running "thumpingly," burning fuel in vain, which is indeed a waste. At this time, the mechanical work generated by gasoline combustion is consumed by the friction of internal parts.