Audi A4 B6 1.9TDI - High corrections and beeps in the program

Hello, my friend has high corrections and beeps in his 1.9TDI 116km, I suspect that one injection is for exchange only I do not know which one makes up for what is weak as I understand correctly. Please help.

We checked corrections at idle and 2 thousand revolutions.

No. 4 looks the weakest.

so 4 is weaker and 1 makes up for 4 I understand?

Is something going on with the engine - any problems ?. Corrections are, but still normal. Beeps a little higher, but I often come across values around 40-50 and the engines flash after a few years. I miss group 18 readings - there should be zero - temporary deviations up to 4 when purging gas. Maybe just problems with electrical compounds - I suggest checking before you change the injection.
http://turbodiesel.hswg.pl/sprawdzenie-stanu-pompowtryskiwaczy-w-silniku-tdi/

in group 18 how rattling on idle there is everywhere 0 after pressing and releasing gas sometimes 127 for a fraction of a second, the engine has a slight vibration and it worries him and those beeps

And are dose adjustments constant or "wavy" - what is the state of dual mass? To begin with, I suggest the simplest solutions - checking the connections at injection 1 and 4.

Dwumas 46 thousand km ago listed on LUK, you mean bending connectors in plugs?
On the 4th cylinder the correction was +0.99 a month ago is now +1.2 as seen in the photo

Yes - improvement of electrical connections, synchronization check. If this does not help, then you can swap injection places for certainty and repeat the readings, e.g. 3 and 4. It is worth checking the efficiency of the tandem pump (fuel). Replacement of injections is a costly matter, so it is worth eliminating other possible causes along the way - cheap to verify.

and how to check the efficiency of the vacum pump? but how weak it would be, all the injections would have had worse corrections? I do not think so, timing synchronization is ok if you mean it is -0.5,

There is a place on the pump to connect with the pressure gauge.
https://youtu.be/Ib_TU2rQNLs
As for performance, yes, I agree with you, and usually negative bumps pop up. I mean to eliminate other possible causes that can give similar symptoms with uneven engine operation. If it turns out that this is an injection (and I would look at it first) - you still have to invest and replace or regenerate it.

Then only 1 to regenerate, i.e. the 4, but I think the pump is ok because the brake is as it should be does not fall into the floor, and e.g. 2 and 3 injection have perfect corrections and bips, and if the pump was weak, all injections would be weak corrections, and the 4th injection is closest to the pump so he should get the most fuel, I think?
We are thinking about removing the 4 injection and seeing these gaskets (apparently they also have a big impact on corrections, etc.) and connectors.

Probably it is also possible that the middle O-ring releases, then the fuel immediately pours overflow in such an injector, the computer tries to save the situation by increasing the dose and too low pressure causes a negative bip. But it's just a shag.

Yes, beyond the brake The pump tends to operate in two areas - air and fuel pressure - separate topics.

Well, I know that she does a few things, I just found on the net that if the vacum pump is weak, the corrections on the injections are falling apart, I think that this pump can be let off the more so that the car from 2004 and there is a BOSCH pump not a LUK with a faulty connector. There is also no problem with firing at -18 candles twice heated and fired clatter without problems on summer oil with the addition of Arrow.

Just today I did the case -50 BIP, the car worked on 3 cylinders, the reason was the seals, specifically the bottom seal. For some reason, the copper washer could not hold and released the compression, which the rubber o-ring could not withstand either. After replacing the BIP around 0, but probably repair will not help for long, because the sockets are broken. In general, I do not know who designed this solution, but it probably happened as part of the professional activation of the mentally disabled, because no normal person would have come up with the idea of mounting a heavily loaded, vibrating element with one screw six.

Tomorrow I will look at the vacum pump, if there are no leaks, etc., and the gaskets on the 4th injection will get a torque wrench because I do not have it myself: /

"In general, I do not know who designed this solution, but it probably happened as part of the professional activation of the mentally disabled, because no normal person would have come up with the idea of fixing a heavily loaded, vibrating element with one screw six."

you did a little bit after VW Engineers ... he, he ...
well, and by the way you are right ... although this solution is not too "happy", as you probably know,
quite a few boys released ... some cars have 400,000 and more and no one has ever rummaged in them ...
but the fact that it's too happy is not ... nevertheless; disabled you could let go ...

"Tomorrow I will look at the vacum pump, if there are no leaks, etc., and the gaskets on the 4th injection will get a torque wrench because I do not have it myself: /"

new key most needed, but Very Important to have New Screws fixing the injection and those from the lever axis ... do not cost a fortune, and used I do not recommend !!!
at the manufacturer's recommendation of 12Nm + 270 degrees (injectors) and 20Nm + 90 degrees (axles) only New ...
because later some complain that the threads in the head are weak ...

What do you think about this key? I will not unscrew it or use anything for tightening, and that's it.

http://allegro.pl/klucz-dynamometryczny-3-8-7-105nm-z-blokada-i7164955538.html

personally I would recommend something else ...
for undemanding repairs Ok ...
but where a bit more precision is needed, it's a bit too weak ...
of course this is just my rating ...