Golf V 1.9 tdi 105km from 2005 - Low car power, damaged EGR, low vacuum

1. Power drop, check engine and after a few km total power drop - the mechanic diagnosed a damaged turbine. They regenerated and power returned for a month.
2. After a month, again check engine and a decrease in power, I returned to the turbine mechanics, they kept the car for a week, checked the turbo, eliminated the N75 valve, cleaned the EGR - it did nothing, they sent me to an electromechanic. Additionally, sometimes when driving or stopping on a fired engine you can feel the exhaust fumes inside the car
3. The electromechanic replaced the bundle of cables and the power returned ... for two weeks. I returned to the electromechanic who said that this time it is an EGR failure and it needs to be replaced, the logs show the failures of the exhaust gas recirculation system. He checked the tightness of the hoses, blinded the vacuum hose and ordered to replace the EGR. Unfortunately, the car still has no power, in low gears it accelerates as normal, the turbo switches on, above, unfortunately, no power.
4. I unscrewed the EGR today and of course it has never been cleaned, it is saggy and locked in a closed position so it probably has no effect on engine power. I suspect that the vacuum pump is damaged and gives too low a vacuum, the connector is slightly loose, maybe there is a way to seal it without dismantling the pump?
Below the pump connector:
https://youtu.be/XKe1lbKKJ_M

At the beginning check the vacuum pressure of the tandem pump and 0.7 bar at all outlets of the vacuum hoses.

Hello
I would take a closer look at the turbine settings if they are correct, because from now on you have a problem with dynamics.
To start with, you need to do proper diagnostics, i.e. dynamic logs.
pzdr

I gave the car to another mechanic, it turned out that the vacuum pump was all right, EGR to be replaced - it could not be regenerated, the mechanic diagnosed a problem with the camshaft sensor that caused the engine to go into service mode.

macoss wrote:

I gave the car to another mechanic, it turned out that the vacuum pump was all right, EGR to be replaced - it could not be regenerated, the mechanic diagnosed a problem with the camshaft sensor that caused the engine to go into service mode.

Unfortunately, most likely the replacement of the camshaft sensor did not solve the problem. I picked up the car on Thursday, the mechanic check the vacuum and the turbine, replaced the shaft sensor, egr, candles, changed the oil and a set of filters. I drove it 400km, yesterday morning the car started and after a while went out, further attempts to start failed. The car fired with a poster but after a while went out, I thought that something with the fuel was wrong (I refueled on Saturday and I left half the tank) I turned the fuel pump on under the rear seat, I did not remove it completely, just moved it. The car started, I did 20km yesterday and everything was ok. Today it started, but after exceeding 120km / h again no power, no check engine on the board. Can you somehow combine these two faults or is it a coincidence?

I will add that the power drop occurs only on a cold engine. The problem is not warmed up after rebooting.

Summarizing:

1. The fuel pump disassembled and cleaned did not affect the lack of power, just a coincidence. You can do it yourself, nothing difficult.

2. Turbine returned under warranty after regeneration, dismantled, cleaned and adjusted again. In addition, a leak was found in the tube exiting the turbine to the EGR. The tube replaced but it still did not solve the problem.

3. Replacement set of vacuum control valves which finally solved the turbine disconnection problem.