Changhe Suzuki Big Dipper automatically turns off when the idle speed is unstable.

Most of them are related to dirty throttle. For a car with a throttle, if there is carbon deposit or other dirt on the throttle, the air intake will be reduced. It is also possible that the idle valve is damaged, or the computer board is faulty, and the air inlet pipe leaks, resulting in unstable idle speed.

The leakage of intake manifold or various valves directly affects the fuel mixing quality and combustion effect. Components that may leak air, such as intake manifold, vacuum tube, activated carbon canister valve, exhaust gas recirculation (EGR) valve and positive crankcase ventilation (PCV) valve, need to be overhauled one by one.

The instability of automobile idle speed is mainly manifested in the fluctuation of tachometer pointer, and it is unstable when idling. Idle instability is often accompanied by idle jitter. Under normal circumstances, the engine idle speed is certain, and the specific level depends on the adjustment of specific models. Under normal circumstances, if the idle speed is too high, the fuel consumption will be higher, but if the idle speed is too low, the engine will shake or even stall. Troubleshooting methods generally include: cleaning the throttle and air intake, cleaning and checking the fuel injector, replacing electrical components, checking the fault point of the wiring harness, cleaning the grounding point, and repairing the mechanical structure of the engine.

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