Oldsmobile/Buick Repair: engine miss, buick lesabre, dry weather

Question
92 buick lesabre  3.8 . new plugs,new wires & had ejectors cleaned about 300 mi. ago. Have a miss at idle. Hardley notice miss while acclerating or at steady speed. First noticed miss during rain. Stopped missing after engine off for bout 1 hr. next day with dry weather it started again & hasen't stopped. Don't know what to do.               Thanks Ron.

Answer
hi ron.tried to get back with you thur but this site had technical probs.well first thing you have to determine exactly which cyl is missing.you can do this very easy let eng idle take a pair of insolated pliers be sure they are insulated.pull one plug wire off at a time from eng or coil pack.the eng will bogg down a little if it does then reinstall wire go to next one when you come to one that don,t make the eng bogg or idle lower that will be the prob cyl.now shut off eng put a spark plug into wire at eng end.lay the plug on the eng so as to ground plug do you have good spark if yes not a secondary ign prob.if no then the coil that wire attatches to is defective.if you have spark there you prob have a bad injector in the cyl at that wire.before you do any of this recheck the tune up make sure no wires are touching or unhooked .believe me no matter how good the tech is it happens.good luck if none of this does it get back with me.please take the time to rate my help  ty billymac