Misfire After Changing Sparks Plugs: 2002 V6

I think you need to start over.
#1 The engine must be cool
#2 Pax side plugs 1-3 you need to remove the air tubes (easy) plugs accessable without much more than a plug socket and ratchet.
#3 Drive side plug 6 just a plug socket and ratchet. I do not remember using a universal on that one, but it may need one.
#4 Put anti-seize compound on new plug threads, dielectric on the side that the plug wire connects to.
#5 start new plugs with a short rubber hose on the end, thread in until you can't any more. Watch to be sure the plug is turning in the hole and not just the hose turning.
#6 tighten to specified torque.
#7 be sure the wires are on correct plug or Misfire will occur. wire sequence is printed on distributor thing, it is like 1,2,3,5,6,4 do not get this wrong.

The first time I changed mine I was ready with a bunch of tools. I was surprized to see how easy it was to do the job. Much easier than my 89 Bronco II.

^what he said.

My best bet would be you got some of the wires wrong, or it is sometimes common when taking a wire off that it may break and the tip will disconnect from the wire and stay on the plug, especially if they are newer wires. Just make sure every wire is right, and if they are, then re-check the plugs you replaced and double check the wires.

glad to know things turned out. Did you maybe drop one of the plugs once?

either that or it's possible you may have turned it a little too tight into the hole