Under what circumstances can I match the door of the car economizer? By the way, what does throttle mean? It's up to you.

The throttle does not match until it is cleaned and replaced with a new one. The throttle valve is used to adjust the air intake. 1, it is best to pull in winter, not too much, too much will lead to no air, 2. You can't find it if you pull it. If there is nothing wrong with the rest of your car, 3. No, for mulberries, it doesn't have a manual throttle. A little drag will improve the speed, but it is not used to warm the car. Can be used for a short time.

Here are some theoretical ones:

The function of choke valve is to reduce the amount of air entering the carburetor air inlet, increase the oil pressure at the fuel injection port, and improve the mixture concentration. This makes it easier to start.