Honda Civic's idle speed becomes higher after cleaning the throttle.

As for the problem of high idle speed, the reason may be that the carbon deposit blocks the idle passage, causing the throttle valve or idle motor to be stuck or beyond its adjustment range, or that the throttle valve is stuck because of too much carbon deposit, which will cause the idle speed to rise after receiving oil. Many times, after cleaning the throttle, the idle speed of oil collection will rise. This is because when cleaning the carbon deposit, the carbon deposit solution enters the throttle shaft, which causes the throttle shaft and the valve base to get stuck. In severe cases, it is sometimes necessary to replace the throttle body or idle motor.

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