14 JAC Yue Yue has slow throttle and high idle speed.

It is possible that the throttle is stuck or beyond its adjustment range due to carbon deposition blocking the idle channel, or the throttle shaft or idle motor is stuck and cannot return due to too much carbon deposition, which will lead to the idle speed rising after receiving oil. There are many reasons for engine acceleration, such as weak high-pressure ignition or some delay in ignition time. Acceleration to a certain extent will lead to incomplete combustion of mixed gas, which will lead to acceleration. ? It may also be the increase of carbon deposition in the air intake, valve and combustion chamber.