A high idle in park can be caused by several factors, including:
* A vacuum leak. A vacuum leak can cause the engine to run lean, which can lead to a high idle.
* A dirty throttle body. A dirty throttle body can restrict airflow and cause the engine to run rich, which can also lead to a high idle.
* A faulty idle air control valve (IACV). The IACV controls the amount of air that bypasses the throttle body when the engine is idling. If the IACV is faulty, it can cause the engine to idle too high or too low.
Driving Without Your Foot on the Gas
If you can drive your car without your foot on the gas pedal, it's likely because the transmission is slipping. Transmission slipping occurs when the transmission cannot engage the gears properly, which causes the engine to race and the car to move forward slowly. Transmission slipping can be caused by several factors, including:
* Low transmission fluid. Low transmission fluid can cause the transmission to overheat and slip.
* A faulty transmission pump. A faulty transmission pump can cause the transmission to lose pressure and slip.
* Worn-out transmission bands or clutches. Worn-out transmission bands or clutches can cause the transmission to slip.
If you experience a high idle in park or transmission slipping, it's important to have your car inspected by a qualified mechanic to determine the cause of the problem and get it repaired.
