Is It Normal for the Engine to Start at Around 1500 RPM?

[PresleyRose]

Starting idle speed is around 1500 RPM, which is a normal phenomenon. When the vehicle starts, there is a cold fast idle speed, meaning the engine is in a cold state. Idle speed in cold state: Whether it's night or day, hot or cold, as long as the vehicle is in a cold state, the idle speed after starting will be relatively high, and there may be slight vibrations, which is completely normal. Reasons for high idle speed and vibrations: This high idle speed and vibration are actually controlled automatically by the ECU for two purposes: one is to warm up the engine, and the other is to reduce emissions. The normal operating temperature of the engine is around 90 degrees, and the normal temperature for the three-way catalytic exhaust purification is 200-300 degrees. To reach these two indicators as quickly as possible, the water temperature sensor sends data to the vehicle's computer indicating that the engine temperature is low, and the computer automatically increases the fuel injection to raise the engine temperature and the temperature of the three-way catalyst as soon as possible.