i honestly don't know how it could effect the jiggle we have but it made mine almost go away completely. And maybe i was unlucky and had a bad NGK plug from the factory but it had the autolite 5224s when i bought it and it ran good, ngks ran bad, then new set of 5224s back to good. I didn't mess with the wire routing or anything in between the ngks and autolites either. but again i think i just got lucky i haven't done half of the fixes as you and its hard to believe that all you needed was a specific plug all along. I didn't have any oil in any cylinders either. I hope you find the source i am very interested.

 

Put new Champion copper's in truck yesterday and the truck was a lot peppier, idle was better, but still not as smooth as it ought to be, still has a bit of the shakes at idle. Surprisingly the old plugs (Champions) were all clean looking when I pulled them out.
It's like driving a different truck, way more responsive with just changing plugs. Couldn't see anything wrong with the old champions, with 8,000 miles on them, but apparently there was. Been hearing opinions about the quality issues with Champions and am now inclined to believe it.

 

99 Dodge Ram 1500 5.9 has a miss fire on 1, 8 new transmission
done a tune up did a oil change, when I start it up it miss fires then stops after it is warmed up. the check engine light stays on and sometime flashs

 

Check plug wires first. When is the last time you had a tuneup?