Ok, I just want to double check which wires go to what...

Front to back:
1. Glowplug
2. front injector
3. ???
4. rear injector
5. Glowplug

Not sure what the middle wire is for, and want to double check that the 2nd and 4th wires control each of the injectors...

 

Pretty sure the middle is ground and the rest is correct.

 

Correct, middle wire #3 is for injector ground.

 

Cool, thanks for the quick responses.

I'm still figuring out why one of my injectors isn't firing. I will probably need to pull it back out and take it apart again.

Started missing after my Stage I install.