307 1.4 hdi 2003 model misfire

I have a 307 1.4 hdi 2003 model car

I have a 2005 model peoget 307 1,4 auto. There was no problem in my vehicle when it was in gasoline, but when the vehicle was slowing down or stopped when it was in the gas, it gave gas to itself or stopped. There is no master that I did not show, every master I took asked me to change a piece of it, I went to the expense but it did not improve. The last time I took it to a master, he said, let's change the spark plugs, the problem said, we changed the spark plugs, this time the problems that did not come out on the gas started to appear on the gas, the vehicle stopped even when it was on the gas, even more increased this problem, the vehicle ramps on the ramp, falls from the traction to the stopping point. Anyway, I went to another master, the room said, which spark plugs did not happen to this vehicle, he said. Anyway okay, whatever is appropriate, I said, let's put it on, I changed the spark plug, but the problem did not improve again. Whatever you did, I couldn't handle this problem. Do you have any advice for me? (repairs I did on the vehicle; throttle cleaned, oxygen sensor changed, spark plugs changed, gas pump changed, air filter changed)

no one seems to have encountered such a problem

Hojam, have you ever consulted a master about the problem? The reason for the change in idling can be from 3-4 pieces. and if it cuts off gas on the way, injectors may have trouble. I think.