What to Do If the Idle Speed Is High During Cold Start?

[VanIker]

High idle speed during cold start is a normal phenomenon. When starting in a cold state, the engine needs to quickly reach its normal operating conditions. Therefore, during a cold start, the engine control unit automatically injects more fuel, burning more fuel than during normal idle to rapidly increase the engine's coolant temperature and bring the engine to the optimal operating temperature. The idle speed typically ranges between 950 and 1300 RPM. Once the engine temperature rises to a certain level, the idle speed will drop to the normal range. A cold start refers to starting the engine when the coolant temperature is low, usually after the car has not been used for an extended period, such as overnight parking.