ive replaced all 5 injectors in my engine, my originals were black top but the replacements from the diesel specialists are green top,
been to the local landy specialist to have then coded in on autologic and when the codes are entered on 3 of them they don't enter correctly.

The codes on the injectors are cyl one NFCNJ.... CYL TWO BDCLK.... CYL THREE LGDBG.... CYL 4 NCCCG....... CYL 5 NDCBK.

But when entered in autologic they are show as in the picture below
[URL=http://s5.photobucket.com/user/hondaboyd16a9/media/Mobile%20Uploads/image_zps906ae3b9.jpg.html] [/URL]

the disco is a 2001 with the 10p engine when its running it has a pronounced diesel knock like a 300 tdi, does anyone know why this is happening.

Watched a program on you tube, must have good batt voltage they plugged in batt charger. Maybe a thought, otherwise I would say they are the wrong colour for your engine.

Just throwing it out there

Pretty sure you can't swap injector colours - they are different and work at different pressures. Depends on your engine.

If I remember correctly and I may be wrong, 10p engine eu2 black top only as they work at a lower pressure.
15/16p engine eu3 green and blue top injectors work at a higher pressure and are interchangable with eachother.

you can run later green top injectors in a 10p engine but not the black top in a 15p engine as the black top cant handle the increased fuel pressure
apparently the last letter doesnt matter to much for coding, have a look at this
http://www.landyzone.co.uk/lz/f50/coding-injectors-hawkeye-260801.html

so it looks like using green top injectors on a early ecu is not possible