The high idle and the up and down, called hunting, is typical also
on these Trucklets, it has to do with the wax pellet cold high idle
system, I just live with it, but there is a fix that involves removing
the pellet system and it just idles low on cold start up. as for the
high hot idle, check your idle stop screws and make sure the throttle
cable is not tight and holding the throttle open
Wild