I have been having an ongoing problem with a low idle. As low as 150rpm (tach reading). Toyota technicians tell me there is nothing that can be done about it. Also, when starting the engine, cold, it revs so high the engine makes a brief clattering noise. Again, the mechanics have no comment on this. Has anyone had this problem and found a solution? My cruiser is a well cared for 93, 4.6L, with 120,000 miles. I want comments from anyone who has experienced either problem, high rev clatter or low idle.