Help 89 pu 22re idle jumping
 

hey guys,
Have an 89pu 22re with idle problems. When cold truck idles fine. Between warm and hot the idle jumps up and down from 1000-1500 rpms. Most of the time it goes away once hot. Any ideas where to start?

I am new to 22re. Last few years I have betrayed my family path of Toyota ownership to tinker with Isuzu diesels, now I'm back!!

thanks