What Causes Engine Idle Shaking and Stalling?

[LaCody]

Engine idle shaking and stalling can be caused by: 1. Excessive carbon deposits: Leading to pre-ignition and knocking, shortening engine lifespan, and significantly reducing engine power and fuel efficiency; 2. Carbon buildup on valves and valve seats: Causing incomplete valve closure and air leakage, resulting in difficult engine starting, reduced power, and increased valve erosion; 3. Carbon deposits and gumming in valve guides and stems: Accelerating wear between valve stems and guides, causing sticking or jamming of valve movement, leading to valve sticking issues. Idle shaking won't decrease with the operation of the vehicle's air conditioning compressor. This type of shaking is caused by worn engine mounts and requires timely replacement of new engine mounts.