Black smoke

Friends, 237 thousand 1.4 hdi oil bakıöı, I have it done in time, when I pump the idle gas at 3 4 thousand rpm, it throws black smoke.

Does the catalyst stop? If there is no traction problem in your vehicle, you don't need to worry about it.

I know it is stopping, there is no problem in traction okay thank you

Catalyst is also a possibility, but injectors are more likely to deviate. Take it to the exjector and revise it with a car and set it to 4. When I first bought it, it was smoking a lot. The 2 injectors had a deflection of 20% and the smoke was noticeably reduced.