Hi! I'm sorry that my reply is so late, I work 2 jobs, so I don't have so much time to hanging around. I bought an diagnostic tester ( diagun launch X-431). And I was reading the codes in my Peugeot, suprisely the number of diagnostic code wasn't shown it was only shown 2 faults, I didn't even read it but just erased it. I'm almoust shure that this 2 faults was the same like before. Then I went to the test drive on the highway. Suprisely the car was running without any warning, until 160 km/h. Then again depullution faulty. I check with the tester the fault and it was just 1 fault and again no fault code only the desripton (Turbo charging pressure regulation Turbo charging pressure too low). And important thing (i think) before all this faults shown, i heard the specific voice from turbo I think the blow off vent was making that noise, now this voice is gone. With this tester I can do more tests when I'm driving the car. I can watch some sensors, torque, rpm, pressure of oil, fuel etc. This should helps, maybe, to find the problem. Just tell me what to check.
I'm also thinking that timing chain could be that part which make te basic problem. If it is need to be replaced, should be replaced some other things that are connected to the timinig chain?
My father have a body shop, and one of my job is work there, so I know the things about cars, but we don't do the mechanic job. Maybe I could try to fix this car by myself.