Stop problem and misfire

When my vehicle is 1.4 lpg gasoline only one contact works. Ronalti stands at 1300 rpm. No playing. When he gives some gas, he keeps choking to keep it constant at 1500 rpm, or when he moves in first gear, the gas chokes off. After warming up and lpg, the beast or the beast in gasoline. When the cold is very cold, in addition, one contact works and stops instantly, depending on the coldness of the air, one or three keZ stops are repeated. Nobody happened to him.

Your idling speed is too high in the first run when cold. When the engine is cold, it should be around 900 RPM when it gets a little warm at 1000 RPM. Your vehicle is drowning because the speed is high. Throat idler engine clean. Have the oxygen sensor values checked.

is that why it stops when it's cold

In my opinion, firstly clean the throat butterfly and idling engine. If you have the skill, you can do it yourself. If these parts are contaminated with oil, the oil becomes slime when it is cold. It can keep the butterfly and motor open. Idling speed is increased. Excess air enters the combustion chamber, you experience a misfire from the poor mixture. When the vehicle gets hot, these parts get hot and the oily places begin to relax. Everything gets better. This should be the first thing you do.