Carlos,
Veedubmad's injector quantities have to be a PD, as those are the kind of deviation numbers we see with PD's. When the number 2.99+ or 3.01- comes up, you are usually looking for new injectors. Veedubmad might get lucky and try Liqui-Moly Purge, which isn't very likely to work, or replace the worst injector. Some will swap two deviating injectors to be sure it's not the cylinder or bad cam, as we pioneered many years ago.
I would caution, there is a burr that is caused by the PD injector body leaning against the aluminum cylinder bore. The burr must be removed before reinstalling the injector or you will cut the seals. Sometimes you can reinstall the seals without replacing, but if you cut it, it's done for. If a any of the lower black seals are cut, fuel will leak back to the fuel return galley and power will be severely diminished. You will always have to replace the TTY hold down bolt.
The rest of this conversation has to do with the 2-Stage rotary pump injectors...
It's probably been more than 10 years ago, we discovered 'not all injectors are created equal'. By using the VCDS/ engine module/ measuring blocks/ block 13 (idle balance) and block 15 (liter per hour fuel usage), we have been able to determine if new injectors are working 1) well with one another and 2) if the fueling usage is close to spec. However, on nozzles which have many miles and much wear, especially ones that the pop pressures have diminished, block 13 is not going to give usable information on balance.
For example, we often find that the pilot pop has diminished from the 220 bar (3250psi) pop pressure, to usually around 170 bar, or 725 psi loss. That's about a 20% loss in pressure. Usually, NoP2, the main stage pressure, which should be at or near 300bar (4350psi), is also reduced. The point is that the injectors are intended to operate at an optimum pressure, which has a bell curve for best performance, I would say, within 5% of the intended pressure, they will then be able to be rated for balance. If they are not popping at the correct pressure, they will most likely show less deviation, unless an injector nozzle is very bad.
Although we've seen a few exceptions for people that use Tier 1 diesel fuels, or regularly run certain diesel additives, it's not all that easy to keep injectors going for 250k. If the original injectors can be shown to pop cleanly through all 5 holes equally and can be shimmed to meet spec, then you may be able to use the VCDS numbers to qualify the injectors. But truthfully, the work 'checking old injectors', does not pay well when we spend hours attempting to get a set of 4 old nozzles to cooperate. It usually doesn't work. As I have said before,"What will you pay me for 3/4 of a working set?" Answer: Not much...
So also, what do the OP's injector numbers mean? Not much...