What is the reason for the high idle speed of Wuling Zhiguang?
3 Answers
Wuling Zhiguang's high idle speed is caused by excessive carbon deposits in the vehicle's engine. You can go to an external repair shop to clean the engine carbon deposits. Solutions: 1. Adjust or replace the throttle position sensor; 2. Clean or replace the idle control valve, and use a dedicated decoder to perform basic idle speed settings; 3. Find the leakage point, reseal or replace related components. The length, width, and height of Wuling Zhiguang are 3810mm, 1510mm, and 1820mm respectively, with a wheelbase of 2500mm. The vehicle features additional silver-plated trim pieces and storage boxes in the middle, and the original cassette player has been replaced with a USB-equipped player with a data cable. The application of various materials is more harmonious; the air conditioning vents are more reasonably arranged.
I've been driving the Wuling Zhiguang for several years, and when encountering high idle speed issues, I usually consider several common causes. Excessive carbon buildup in the throttle body can lead to inaccurate air flow measurement, causing the idle speed to rise. Or, the idle speed control valve might be stuck, affecting air intake control. Check if there's any air leakage in the intake hose—those rubber tubes tend to crack over time. If cleaning the throttle body and idle speed valve doesn't help, then inspect the oxygen sensor. If it's dirty or faulty, it can cause the ECU (that computer module) to misjudge the fuel mixture ratio. Also, if the coolant temperature sensor malfunctions, the engine might think it's still in cold-start mode, raising the idle speed. Regular maintenance is crucial—cleaning carbon deposits and replacing the air filter can prevent such issues. While high idle speed isn't a major problem, prolonged neglect can affect engine lifespan. I recommend addressing it early for peace of mind and better fuel efficiency.
As someone who repairs cars year-round, I have to say that the high idle speed of the Wuling Sunshine is mostly due to a control system issue. First, there might be an incorrect baseline setting in the ECU, possibly from improper calibration during previous repairs. Then, idle speed motor failures are common—stuck armatures or damaged coils can make it less responsive. If the air flow sensor is dirty or aged, inaccurate readings can also push the RPM higher. Check for vacuum line leaks, especially at the hose connections behind the throttle body, as pressure leaks there are a hidden risk. Additionally, incorrect signals from the throttle position sensor can mislead the ECU about throttle opening, maintaining a high idle. Don’t overlook clogged fuel injectors, which cause uneven fuel supply and engine instability. This kind of issue requires a diagnostic tool to read trouble codes for precise resolution—don’t tinker blindly to avoid damaging more parts. Safety first—get it checked at a shop promptly to prevent accidents.
