206 1.4 HDI X-LINE 2003 sudden gas shortage in vehicle

Hello;
206 1.4 HDI X-LINE 2003 when my vehicle is overloaded with gas, sudden gas shortage occurs and the current gas cut is like braking and it goes to normal and continues on its way. This event happens in seconds. However, there is no problem when I load the gas normally and use it. Also, from time to time, when I want to stop at the light or something, the oil lamp and the stop lamp are on and off, like STOP, when the vehicle is slowing down. I do not know if this may be due to contactlessness, but there is no problem while moving. It also flashes at idling but this is very rare. What's the problem ?

Dude, I have the same vehicle,
Check your fuel and fuel filter first.
If it continues, check injector will be improved.

Brother, I do them today. Today, the sound of the gas pedal sounds like a buzz. When it gives light gas it feels like a cut but there is a sound. Something seems to be turning around?

Vehicle diesel by the way