307 cycle fluctuation and stop problem

I own the 2005 model 1.6hdi 307. I have the vehicle for 1.5 years and I have come to the cooling point from the vehicle due to the problem I have had in the last 1 month. To summarize my problem briefly, the vehicle stops on the move. I feel that it will stop by making a cycle fluctuation when idling 30 seconds before, while traveling at a constant speed, I do not feel the fluctuation in the engine. After stopping, he sometimes works at the first starter, sometimes waiting for 2-3 minutes and runs at the second starter. I had to call the tow truck twice. I took the vehicle to the authorized service, it was connected to the computer and the vehicle was said to have no problem. I left the service, 500 meters ahead, I stayed on the road again. I called the masters and came and took the vehicle. They removed and cleaned the float and checked the warehouse. They disassembled and checked the injectors, their settings were irregular, and their settings were reinstated. The problem was not with the injectors either. I replaced the diesel filter and the air filter. Again the problem did not go away. We replaced the last crank sensor, there is still no improvement. Now he says there is a problem with the master air flow meter and heating roller in a specially authorized service. I no longer have faith in the masters. Why do you think my problem might be due to?

But because of the gasket problem, he had problems similar to yours. so this came to my mind Of course mine is a possibility. I'm not misguided, brother.