So, long story short i had to replace my fuel rail because it was leaking, (see other post) and the new rail came with all 6 injectors and the pressure regulator (99$ U.S shipped) not to bad at all.

BUT! the injectors in the new rail are different soooo that raises the question of what are the correct injectors for my car?

The ones currently in the car are model # D3156BA

The new ones that came in the mail are D3156KA

So whats the difference? which ones are "better" for my XJ6 VDP?
Was i running incorrect injectors for my car? and would that have caused a problem?

Pictures of each injector example attached below

Thank you

 

well, the quick search on both part numbers shows that both of them were used (in UK) in X300 and funny enough, in all 3 engine versions... 3.2, 4.0 and 4.0 supercharged... So looks like both of them are correct parts... except the parts numbers, can you see any significant differences?

 

Well, oddly enough not at first glance BUT i know i have seen a tech service bulletin about fuel injectors but i cannot for the life of me figure out where i have seen it.

There also seems to be some reference through the internet that the blue rimmed ones were for the XJR? I don't know if that's accurate.

Hopefully someone knows this tech bulletin im talking about, it talks about injector coloring which may or may not have anything to do with this.....

 

I TRACKED IT DOWN!

http://www.jagrepair.com/images/TSB/...tification.pdf

jaguar TSB number 18-46

ISSUE:
Original equipment fuel injectors are color coded to aid in assembly during engine production.
Fuel injectors supplied as service parts do not follow the same color coding format, but they can
be identified by the supplier’s reference number stamped on the injector.
ACTION:
Refer to this bulletin to identify injector applications by referencing the supplier reference number
to the Jaguar part number. The locations of the supplier reference numbers and the color code
band is shown in Illustration 1.


AJ6 4.0L EBC 4430 Green Green D3155KA D3155AA

AJ16 N/A DBC 10423 White Green D3156KA D3156AA

AJ16 S/C DBC 11041 Red Green D3165KA D3165AA

so there were different part numbers but the injectors i have installed currently are not listed hmmmmmm even more strange.