RE: Firing order on the coil pack
[div class="dcquote"][strong]Quote[/strong]
I saw in another post that it looks like your asking about a '94, if so I ran into the same problem and came up with this from a member on another site... http://www.eden.rutgers.edu/~jfd/plug_diag.jpg(Thanks to wildrage on markviii.org[/div]
Did this turn up on your search?
__________________________________
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.
________________________________________________________________
That was an excerpt from an old post I made years ago for my '93.
Looking in the manual, the configuration changed slightly from 1993 to later years...
1993
4-8
3-7
2-6
1-5
13 78
65 42
______
1994/1995/1996
4-8
3-7
2-6
1-5
63 72
15 48
_______
Or did it?
If you read the line...
The coils are firing 1-2-3-4 from the passenger side to the drivers side.
... you see that the actual firing order did not change. 1 & 6 are transposed on the passenger side coilpack while 2 & 8 are transposed on the drivers side coilpack. BUT 1& 6 fire at the same time since they are on the same coil of the passenger side coil pack and likewise 2 & 8 fire at the same time since they are on the same coil of the drivers side coil pack.
Why the change?
Each 'coil' has a positive and negative. The coil pack polarity is as below...
-/+
+/-
In '93, cylinder number 1 was negative polarity and number 6 was positive polarity. On the other coilpack, cylinder number 2 was negative polarity and number 8 was positive polarity.
From '94 through '96, cylinder number 6 was negative polarity and number 1 was positive polarity. On the other coilpack, cylinder number 8 was negative polarity and number 2 was positive polarity.
Now let's complete the diagram(s)with the polarity indicated.
1993
+4.8+
+3.7-
-2.6+
-1.5-
-13+ -78+
+65- +42-
___________
1994/1995/1996
+4.8-
+3.7-
+2.6-
+1.5-
-63+ -72+
+15- +48-
____________
What changed? The polarity of plugs 1,2,6 & 8.
Now you know the rest of the story. :+
