What Causes the Idle Speed of Wuling Rongguang to Fluctuate?

[NadiaMarie]

Fluctuations in the idle speed of the Wuling Rongguang are mostly related to a dirty throttle body. For vehicles with a throttle body, if carbon deposits or other contaminants accumulate in the throttle body area, it can lead to reduced air intake. Other possible causes include a damaged or stuck idle valve, a faulty ECU, or air leaks in the intake manifold, all of which can result in unstable idle speed. Specific details are as follows: 1. Intake manifold or various valve leaks: Such faults directly affect the quality of the fuel-air mixture and combustion efficiency. Possible leak points include the intake manifold, vacuum hoses, charcoal canister valve, exhaust gas recirculation (EGR) valve, and positive crankcase ventilation (PCV) valve, all of which require individual inspection and repair. 2. Main symptoms of unstable car idle speed: The tachometer needle fluctuates up and down during idle, indicating instability. Unstable idle speed is often accompanied by idle shudder. Generally, if the idle speed is too high, fuel consumption will be relatively higher, but if the idle speed is too low, it can cause engine shudder or even stalling.