nightmistwalker wrote: the idle seems to still drop to low once all the way warmed up and in gear ,,drops to around 600 rpm and causes the car to vibrate a bit,,wondering if i adjust it on the set screw if that would help maintain at least 800-1000 rpm idle?
Vibrologist is probably right about the vacuum leak, so I'd change the intake manifold gasket and throttle body gasket before messing with the set screw. They're easy and it costs about $25 all together for the two gaskets, Permatex 85409 gasket sealer/dressing, a can of carb cleaner, and a roll of shop towels.
Go to your local Toyota dealer and give the parts guy these numbers:
Throttle Body Gasket - 22271-0D030 (black rubber gasket)
Intake Manifold Gasket - 17171-22060 (make sure it is ORANGE)
biodieselrabbit posted pics of the job here:
viewtopic.php?f=20&t=33056#p475654