Citroen Xsara 2.0 HDI Bad injectors

First of all greetings and thank you all.
I have a possible problem of 2 injectors in poor condition of a Citroen Xsara 2.0 hdi year 1999 "Motor Rhy".
-It would ask you for whether you could teach me how you check the injectors apart from measuring resistance in your connector with a polyimetter.

-And on the other hand, if you have to change these injectors, if you have to encode or do not just set up the new ones and already.

I said as always a health and thanks to all.

Hello Piter112, to check the injectors begins by measuring the resistance of the coil of each one (I do not remember the value in OHMS) and compare them with each other and you know, if it does not give cut coil resistance, if it gives excessive it is that the winding is burning (measuring between its two terminals and having it unplugged). I do not know if the engine starts, if so you can check if they open the needles well by putting a transparent tube in the return of each of them towards a specimen and checking the flow that each of them delivers in the leftover, if any is excessive it means that it does not open well and then it returns more than the rest.
Another thing that catches my attention is that you fail two ... It seems that the injection is commanded by two stages within the ECU; One for cylinders 1 and 4 and another for 2 and 3, look to see it is not the subject of the ECU has two cylinders for this, you must measure in the ECU plug between the poles 2-30, 5-6, 3-31, 4-32 the same as the DW10. Greetings and that is good !!

ISMAEL53 Thank you very much for your fast answer, I have been all very clear and with extra details. I will see the connector to the ECU on its resistance.

Thank you very much Ismael53.
As always a health and thank you very much.