Misfire at low speed and not getting gas

Peugeot 206 1.4HDI Diesel I own the vehicle. Our pasha created a new problem. I added the video below. It cuts the gas at low speed and gives a sound like fr fr fr. But it doesn't always do this. Zero problems at high rpm. I go up to 120 130, there is not the slightest gas cut and sound. The problem may be the cause.

Blind the egr, let the exhaust man plug in a blind plug, have the injectors connected to the machine, check if it works properly, and finally, your speedometer is showing wrong, remove the odometer cap and remove the odometer glass, if possible, connect it to the device and set it to idle. Estimated 850 870, you can also check the temperature gauge to see if it's correct. you can move the needle to the right place by moving it slightly, if there is no device, remove it again, look at all the hands, bring it to the zero line