Make sure the TPS is adjusted right first:
- http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

Then set the timing, then turn down the idle speed:
- http://www.4crawler.com/4x4/TLCA_TruckTech/TruckTech.04.09.html

And there is probably some sort of idle/throttle kickup device for the A/T, make sure that is working OK.