hi, my 4 runner v6 3.0 auto trans has idle issues in drive. it idles around 500-600 rpms and at stops im afraid its going to die...i have adjusted the idle bleeder screw on the throttle body all the way out and does not help AT ALL....could it be the tps? it idles fine in park...around 900-1000...i havent been able to find a vacuum leak either...

just to kinda help us round this down...

...fresh rebuilt motor
...just passed smog
...runs great (besides wanting to die at stops)

please help, any input would be helpful...