206 1.4 hdi is not working

Assalamu Alaykum, first of all, I have a 206 1.4 HDI car. The main problems with the car are 1- It doesn't pull, as you know, it doesn't consume gas, there is very slow acceleration. 2- There is a slight fluctuation in idle and it stalls occasionally. No matter what I did, it didn't work. I changed the air flow, it didn't fix it. I canceled the software and had it done again, but it didn't fix it. I canceled the EGR, but it didn't fix it. The injectors were cleaned, but it didn't fix it. No matter what I did, if anyone has experienced such a problem, can you help me? The air flow was changed in the aftermarket, by the way, but the mechanics don't say anything, no one understands anything, what goes out of my pocket and the problem isn't solved, no matter what I did.

Hello sir, unfortunately the aftermarket may not provide the best results. Also, if the turbo has been checked, the turbo solenoid valve may be faulty.

Turbo was checked, there is no problem, air flow is also giving a problem with the brain, the masters do not say this directly, they will definitely do it from now on.

Without a competent technician, what can we say? May God help you. But if you can find an original flow meter, try it with a computer to check turbo pressure and injector timing. I also recommend having your car checked for error codes by a specialized service center that has the original software.