I replaced the spark plugs recently. Had autolites in it, so I replaced with the proper Denso duel-electrode style plugs. I gaped them at 0.40. I also disconnected the negative side of the battery. Started getting misfire while idling @800rpms.
I took the plugs back out and re-gaped them to ensure they were within spec but no luck.
On a good note, no negative signs on the plugs (lean/rich/fouling)... but thats only after ~500 miles.