Stop on departure ..

Greetings. As you know, I have a 2002 307 xs vehicle. I have been driving in a quiet place since February but now I live in the big city. I thought I was wrong when I was accustomed to my car. I stopped in an empty place and dealt with this problem by car.
1) The speed of the gas pedal does not react immediately at the press, it is like a diesel vehicle, and I hear the air filter sound loudly. The speed of the accelerator pedal is high and the speed is 3 thousand after the sound of the air filter (there is the original air filter).
2) Occasionally a popping sound sounds from the exhaust.
Are these normal? Is it completely my inexperience to stop it? Thanks ..

If the vehicle has LPG, there may be a problem with the LPG filter or its adjustment.

First, get a butterfly cleaning. and have the valve checked

Today, I visited a few masters on the recommendation. Someone diagnosed without looking at the car, said spark plugs are dead, I said, but why is it not doing the same problem in gasoline (of course) Then I took it to a master who has a known lpg kits, connect it to the computer. Did he come out?
When he said that he took the car from the computer to gasoline, he took it to the tube and looked at it, there was a fissing sound from somewhere ... Then he turned to me and said: Thank God, you did not explode.
It turns out that the pipe that goes out from the LPG filter of the car and goes to the injectors is worn, corroded, drilled ...> Half of the gas that comes out of the filter and which needs to go to the injectors escapes. The car both falls out of traction, stops and does not eat gas. We changed the plastic pipe, we went to the test, the car I used was old car. It has improved .. Also, he made the gas adjustment, he deleted the A.faoult error and gave 25 TL.
He said come back in a few months, he said, let's do lpg and said, let's change the filters, clean the computer injector, replace the worn pipes, he said to him 100 TL, I said, after the injector cleaning, a few thousand km problems were experienced, it was logical to change it, he said a lot of money. He said, "We do the cleaning with a computer, you won't have any problems."
Yes, friends, I wanted to share the solution to my problem.
Note: I like the eyes of the big city, the fact that there are a lot of competitors increases both the quality and the interest.