How to Adjust Car Idle Speed?

1 Answers
SanGenevieve
07/28/25 8:09pm
To adjust the car idle speed, first turn the plug clockwise until it cannot be turned anymore, then rotate it counterclockwise by 3-3.5 turns. Next, install the idle speed motor back into the car, fully turn the key to the ON position, and the onboard computer will automatically adjust the idle speed motor. More information about adjusting car idle speed is as follows: 1. If the idle speed is normal, it means the adjustment is correct. 2. If the idle speed is too high, it indicates excessive air intake. In this case, remove the plug and rotate it counterclockwise by 0.5-1 turn, then repeat the above steps. 3. If the idle speed is too low or the car cannot start, it means insufficient air intake. In this situation, turn the plug clockwise by 0.5-1 turn.
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