Really high idle?

The first thing I would do is check the floor mate on the drivers side. Next, I would disconnect the throttle cable. If this does not make difference check the EGR valve for internal leakage, here is a video to help.

https://www.youtube.com/watch?v=DqUCbbKdWf4

Also, please go over this guide as well

https://www.2carpros.com/articles/engine-idles-too-high

Please upload a short video in your response of the problem, so I can see what's going on :) Ken