Injector Questions

[eddr]

Hi All,

Recently purchased a 2006 XC90 D5 which has a hard starting issue :-
- First start of the day requires 5 - 10 seconds of cranking
- Will start normally then, for the rest of the day
- Battery replaced
- Glow plugs replaced

This then left us with the injectors and so got a leak back test kit and I think the results are self explanatory - this is consistent having repeated the test a few times.

The attached picture showing the result of the leak back test is after 2 minutes with no. 3 obviously being an issue but should we also be concerned about the others?...

The current injectors are Bosch I believe - my understanding is that as long as the injectors are replaced with the same 'class' then no re-programming is required - is this correct? I can't see any 'class' number on the injectors.

Finally - when we get a new injector, where do I get the seals and a new clip? (We've lost a clip in the process of testing) - Is this suitable? -> https://www.ebay.co.uk/itm/Genuine-V...hoC2ZYQAvD_BwE

Thanks in advance!