What causes high idle speed in BYD F3?

[MacOwen]

The main reasons for increased idle speed in BYD F3 include: excessive air intake, excessive fuel injection, or incorrect engine control signals. However, a sudden increase in idle speed does not necessarily indicate a vehicle malfunction. It is important to conduct timely inspections and repairs to identify the specific issue. Below are the causes of abnormal idle speed: 1. Throttle valve malfunction: A dirty throttle valve can cause errors in the throttle opening angle, reducing its sensitivity. During idle, the throttle may not close properly, leading to abnormal idle speed. Additionally, throttle valve issues can affect engine power, acceleration performance, and fuel consumption. In severe cases, it may even cause difficulties in starting the engine. 2. Idle speed control valve malfunction: A faulty idle speed control valve can prevent proper adjustment of idle speed, leading to unstable idle, difficulty in cold starts, and other issues. In severe cases, the engine may not idle at all and stall when the accelerator is released. 3. Sensor malfunction: Faulty sensors can cause the engine control unit (ECU) to make incorrect judgments, or the ECU itself may malfunction, resulting in abnormal engine idle speed.