RE: Spark plug wiring diagram
Look here...
CYLINDERS
4-......-8
3-......-7
2-......-6
1-......-5
(FRONT)
COILPACKS
13......78
65......42
(COILS)
1-2......3-4
See how the cylinders are laid out?
Cylinders 1-2-3-4 on the passenger side front to rear.
Cylinders 5-6-7-8 on the drivers' side front to rear.
See a coil pack on each side?
One coil pack for cylinders 1, 3, 6 and 5 on the passenger side.
One coil pack for cylinders 7, 8, 4 and 2 on the drivers' side.
The coils are interchangable and are labeled 7/1, 8/3, 4/6 and 2/5.
Each coil pack is actually 2 coils - each coil fires 2 cylinders. You really have FOUR coils.
Cylinders 1 & 6 fire together on coil number 1.
Cylinders 3 & 5 fire together on coil number 2.
Cylinders 7 & 4 fire together on coil number 3.
Cylinders 2 & 8 fire together on coil number 4.
See the symmetry?
Each coil fires a pair of cylinders.
The coils are firing 1-2-3-4 from the passenger side to the drivers side.
The first round is firing cylinders 1-3-7-2.
The next round is firing cylinders 6-5-4-8.
So the firing order is 1-3-7-2-6-5-4-8.
I can double check the '94 manual, but I'm sure it's identical.