PTP,
I would have no joy in those values. When there is that amount of deviation, switch the worst two. In this case, switch #1 and #4 and see what happens. If the deviation follows the injector, it's the injector. If deviation follows the cylinder, then you either have bad rings, valves or worse. Rarely does the pump make one injector falter.
I assume your readings are at idle. Normally, when looking at values, we open VCDS/ engine module/ block 13/ 15 and 10. Idle balance, Liter per hour fuel usage and correct me if I'm wrong, but engine speed/ water temp. Maybe 7?
The block 15 should show as low as .2lpm, but is acceptable at .4-.6. Since nearly all the fuel required at idle is provided by the first stage, NoP1, we also run the engine up to 1500rpm and that will make the NoP2, second stage activate and the numbers will alter yet again. the lpn may rise to 1.8 to 2.8. The closer to 0.0 on gr/ str each nozzle runs, and the smaller the lph number, the better they will fuel efficiently.
Much of what we have done is experiment (bang head against wall) to find effective procedure. Some injector installers warranty only pop pressures; not flow values. We see that as a big problem. The flow values are the amount of fuel entering the combustion chamber and that is the most important value to get an engine to accurately balance fuel to each cylinder.
