The car just finished changing the oil, and what happened when the idle speed was unstable and it started to stall?

Hello, according to your problem analysis, cleaning the throttle is mainly aimed at engine idling instability and easy flameout. When there is too much carbon deposit in the engine, the gasoline sprayed by the fuel nozzle will be absorbed by the carbon deposit during cold start, which leads to the mixture being too thin during cold start and the starting is difficult, and it is easy to crash until the gasoline absorbed by the carbon deposit is saturated. Carbon deposition in the fuel nozzle will cause different fuel injection quantity in each cylinder, resulting in engine jitter or car jam; When there is too much carbon in the spark plug, the spark plug will not work because of air leakage, and the engine will shake; Too much carbon deposition on the accelerator will also cause difficulties in starting, idling jitter and accelerated flameout. Also check whether the throttle position sensor is working properly. At the same time, because the engine runs at a low speed, the oil pressure does not keep up with it in time, so that the engine can not get a good mechanical operating condition, which leads to engine jitter.

When the engine speed is low, the engine oil becomes thinner when the engine is hot, resulting in the oil pressure not reaching the value specified by the manufacturer, which leads to the alarm of the oil lamp. When the car is cold, the viscosity of oil is high, and there is less oil leakage in the gap between oil pump parts, so the oil pressure can reach the value specified by the manufacturer, and the oil lamp will not light. Therefore, it is recommended that you check the fault of the oil pump as soon as possible. If used for a long time, it will cause serious engine wear. I also want to remind you that while overhauling the oil pump, you should also check whether the oil circuit is blocked.

I hope I can help you!