This is why I'm addicted to this forum... Education! Gear heads and grease monkeys? Not anymore- this **** is way to complex for the average schmoe! Intuition doesn't take us very far anymore.

 

You never get anything out of the second ignition because it's on exhaust stroke to burn any un-burned fuel as Sharps stated. Besides, the only engine I know of right now that has a 2 plug set up is the HEMI.



Technically, the coils are referred to as "Ignition Coils" as per the Service Manual.

 

hydra try again, 5.7, and the NEW (08+) 4.7 have two plugs per cylinder, im pretty sure the 6.1 hemi also has 2 per cylinder and i wouldnt be at all surprised if the new 6.4 has it too (i havnt seen anything official yet tho)

 

Yeah the new 4.7 has 16 plugs now. Intakes are 30K and exhaust are 100K. All Bosch brand.

 

So, both the plugs don't fire at the same time?

 

correct.

 

Well of coarse those, sorry a little behind the times......LOL


BOSCH!

Please show proof of this accusation?

 

hydra, i hate to rain on your parade, but these are the plug numbers from the owners manual in my dads 09 dakota qc w/ the NEW 4.7

fr8te2 for the upper bank of plugs
fr8t1332 for the exhaust bank of plugs

a quick google search comes up with those being bosch part numbers

 

Wow, freaking Lamesauce.

Such a waste of spark plugs AND coils.

The waste spark DIS in my Datsun runs just fine with only a single plug per cylinder and only 3 coils on a 6 cylinder, go figure.

 

Oh man!

I feel like I'm gunna be sick........