I was just guessing
most the time i see a misfire code (8 out of 10) the sparkplug wires have excessive resistance or the plug has carbon tracking on it.
I would suggest you get a spark tester and hook it to a ground and your number 5 plug wire. If your tester sparks then you know the circuit UP TO the plug is good and the plug is bad OR you didnt have the plug wire properly secured to the plug. IF it doesnt spark, then first make sure you have a good ground THEN your going to have to work backwards to find the problem. Check connections of the wires and possibly resistance if you have a digital multi meter.
did you install the plugs and wires 2200 miles ago yourself?
2000 TJ Sport, 4.0L, 5-spd, RE 3.5" with all 8 adj arms and adj trackbars with 35"s, D30 w/ Lockright, 8.8 rear axle, sye and CV driveshaft, M.O.R.E. 1" BL and MML, IPF headlights w/ H4 FATBOY bulbs, PSC power steering skid, rock-it man rockers, uniden pro 520xl WITH PA :)
Future mods: 4.88s and ARBs?, belly up, dif guards, Gastank Skid.