[cherokee_guy82]

I have the same yr/ model... does the same thing, mostly at idle speeds. I have been told by several friends that the problem is the valve guide seals. At idle, oil seeps into the cyl and burns off causing white smoke. Auto zone or any knowledgeable parts store should be able to direct you on what it requires and how to do the job if you are a do-it-yourselfer like myself. I have not yet fixed mine but I have looked into a kit that allows you to use compressed air to hold the valves closed to remove the springs, etc without having to remove the head.