Why Does the Idle Speed Increase While Driving?

[OTeagan]

The reasons for the increase in idle speed while driving are as follows: 1. Intake sensor issue: It may be due to a damaged intake sensor, causing excessive air intake into the vehicle, which improves the combustion efficiency of the fuel, naturally increasing the idle speed. 2. Water temperature sensor issue: If the vehicle's water temperature sensor is damaged, the onboard computer will determine whether the current water temperature is appropriate. If the water temperature is not suitable, the vehicle's water temperature will actively start to rise, and the way to increase it is by raising the idle speed. 3. Throttle failure: If the throttle position sensor is damaged, the vehicle may assume the throttle is in a semi-open state, while the intake valve is actually fully open.