1.4 hdi Knock

Hello everyone, my vehicle is 207 1.4 hdi 198.xx I have just bought the vehicle in a thousand I have a problem, I wanted to open the subject that there must be a problem with friends, when I want to accelerate my vehicle, the engine comes with a snapping sound when I want to accelerate, low speed is not available at low speed The more I press the accelerator, the louder the sound For example, when driving at a speed of 80 kmh, there is no sound with half the gas, but if I press it a little more, it sounds like plug and play. Does it while the vehicle is under load

Professor, there may be many reasons. but if there is a problem with the injectors you said, it may be due to this. Because there is no ignition fuel injection nozzle. First of all, check the status of the injectors with an original software to see the fault codes.