A plastic straw fell into the accelerator, and after a long walk, the car stalled for a while.

It's easy to turn off the engine when the car is cold.

Keep it for a period of time after startup, or it can be used normally after running for a period of time. The car can be used normally as long as it is not too cold.

The throttle is dirty and needs cleaning, but a dirty light throttle will not cause all the phenomena you described.

Your phenomenon should be that there is too much carbon deposited behind the intake manifold and intake valve. Because of the cold weather, a thick mixture is needed during cold start, but there is too much carbon behind the valve and the intake manifold, and the sprayed fuel is not atomized well, and then some of it is adsorbed by the carbon deposit and does not enter the cylinder for combustion. This problem can be solved by removing carbon deposits.

Items: clean the throttle valve, clean the injector, remove the intake manifold for cleaning, and remove the carbon deposit on the back of the intake valve.

Materials: 6 accelerator cleaning agents, 4 pairs of upper and lower aprons of fuel injectors (if damaged and hardened, replace them), and 3 small bottles of carbon removal additives (in the fuel tank, it is better to run at high speed).

Engineering cost: throttle valve 50, nozzle cleaning 50, decarbonization of intake valve 100, decarbonization additive 90 yuan.

About 300 yuan, prices vary from place to place, for reference only.