1987 Toyota turbo pickup

Got the truck wth the engine pulled out and in the bed. Rebuilt it and got it running. Seems to be sluggish with throttle response. I tap the throttle and nothing for a second or two. Idles low almost to a stall but keeps going. I think i have adjusted the TPS the right way but i'm not sure why the idle is so inconsistant. Symptoms seem worse when the engine is cool and just warming up. Thanks