206 1.4 xr automatic gearbox

206 1.4 xr automatic gearbox, I put a gasoline brand lpg on my car, the car raises up and reduces and blasts from the exhaust, the tuning of the vehicle is done.

I am waiting to introduce

Does this problem happen only when lpg?
Was this event started after the lpg was installed or was it stopped?

How many thousandth km?

I bought the lpg immediately after I bought the car, because the owner says that he did not have such a problem, he makes the vehicle more than 200 thousand lpg.

the speed indicator probably seems to work sometimes depending on it, sometimes not

The car does the same thing in LPG and gasoline, the idle rises and falls, the speedometer is working sometimes, it does not work, it stops working, sometimes it stops, but the worst of all, the single and big blasts that come out of the exhaust, especially if I have an idea of pulling my foot off the gas, I would be glad if I share it.

Is there any solution or an answer to my problem tsk

I guess this problem did not come to the press of anyone before. 2000 model 206 & nbsp; 1.4 xr I use an automatic vehicle, the vehicle is running by vibrating, sometimes stopping and detonating from the exhaust & nbsp; If I can say what I have to do or this is my solution, please reply if I ask you