1997 Subaru Legacy "high idling fix 98 jeep" Questions

...high how do i fix this this .and when im driving it and come to a stop or turn it turn out and i half to start it back up again why is that i had to replace the coolant sensor. Take it to Auto Zone ...

high as i gun the throttle The engine worms up and gets to closed loop status. CL. if not I fix that first, after all fixing idle hard fails is 10x easier than flying down the road at 2000 rpm. Ok got