Afm ( active fuel management ) aka d.o.d.

[djv86]

1-8-7-2-6-5-4-3
a---b---c---d--

a=1
b=7
c=6
d=4

Is this what you found...?

I only physically checked 4 and 6 and that is what happens solenoid d is cyl4 and c is cyl6