The idle adjusting screw on my '88 22RE throttle body works itself into low, low idle settings in a about 15 minutes of driving lately. It also seems turned pretty far out (the top of the screw is flush with the top of the bore it screws into.). It actually tightens down by itself as I drive until it won't idle. Maybe the idle air bypass passage is choked off with dirty gunk requiring the screw to be backed off too far. Anybody ever seen anything like this? -- Matt

'89 4runner SR5, 3.0, auto (fun)
'93 xtra cab, dlx,3.0, 5spd (work truck)