Misfire at lpg

Hello friends. The 2006 model 1.4 lpg automatic gearbox was fitted with a lpg one year ago. And the problems started with the cooling of the winter weather. The vehicle kicks after 30 to 40 km in the long road in cold weather. As if someone was pulling back from behind. But there is no problem in the city, that is, at a slow speed. Last year I spent the night trying to solve this problem, but it was not resolved. Spark plug coil spark plug cable has changed everything. The problem is the same. But there was nothing on gasoline. The weather was hot. Help me happened again today. This time I need to solve

I had the problem of misfire for 2 years, I changed the bobbin, ninety percent of the misfire went, sometimes it is still doing the room, I bought a medium quality coil, I think it is original appreciation in peugeot service.

Was it only in cold weather, but in your misfire problem?

No one can help

Doesn't matter cold hot