206 does not eat gas

My friends car model 2004 model 206 1.4 lpg gasoline and when I press the gas to accelerate the LPG, the car remains on the ground, it does not eat gas for three or five seconds. I took it to the industry computer injector failure gave ignition misfire malfunction. One injector changed, spark plugs changed, LPG maintenance was done. But still the same problem has not passed. The shooting of the car has improved, it is rolled over better than before but sometimes it repeats the error I said, what should I do

It makes both gasoline and lpg. When I want to overtake the car, I stay suddenly leaves me in a dangerous situation. Let's set the master valve in the industry, he said, I'll get him done weekly. If you have any other solution suggestions, I am waiting. Thanks in advance.

The upper oxygen sensor in the 75 or 90 or the catalyst of the vehicle seems to have broken out.

My 75th teacher. If we are talking about the sensor (map sensor) on the manifold, I changed it. The problem did not improve. Bayrambugra2020-05-17 04:29:21

I am talking about the catalyst, the sensors in the exhaust. You will see when you open the hood from the sensor.

The sensor on the catalyst has not changed. Take off your soul and see if the experience will improve.