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Coil Pack firing order


hannyman

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Hello, I am new here, and have a question. This past weekend, my check engine light came on, so I pulled into Autozone and used their code reader. it showed a fault in the #5 cylinder, a bad spark plug most likely the culprit. I bought new wires and plugs, as well as a new coil pack, as I just bought the truck, and figured it would be a good idea to replace. When I was replacing the wires, I did so one by one to avoid installing in the wrong order. I noticed that the firing order is 180 off. #1 is where #4 should be, #6 is where #2 should be, and #5 is where #3 should be. is it possible that someone may have replaced the cam synchronizer 180 off? Has anyone else had this issue?

Thanks.
 


adsm08

adsm08

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It doesn't matter on that setup. It isn't like a distributor where it fires each terminal one at a time in order. The 1 and 4 terminals fire together, so do the 2/6 and 3/5 terminals. Your coil pack only has 3 coils in it, and each one has two cylinders attached that fire together, so you can have the plug wires reversed across the pack and it won't change how it runs.
 

RonD

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Actually coil pack order for the 3.0l(or 4.0l) is
3 4
2 6
1 5
front

or
1 5
2 6
3 4
front

Yes only 3 coils are inside this coil pack
So the spark plugs are fired in Pairs, 1 and 5 fire at the same time, as do 2 and 6 and then 3 and 4

Ford numbers its V6 cylinders this way
3 6
2 5
1 4
front

But the coil pack has to match engines Balanced Pairs, 2 pistons are at TDC every 120deg rotation to Balance the engine
1 and 5 are a balanced pair, as are 2 and 6, and 3 and 4

so 1 and 5 have to be on the same coil, as do 2 and 6, and 3 and 4

so you get
[3 4]
[2 6]
[1 5]

[] = one of the coils in the coil pack

Yes, you can reverse the spark plug wires on one coil in the pack
So 1 and 5 can be hooked up as 1/5 or 5/1 should not effect anything, same for 3/4 or 2/6
 
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