1999 Isuzu Trooper, high idle

Thanks for all the help. Yes I did set it to the correct position (less than 28mm) to no avail. When I took the pintle off I connected the electrical cable and run the reset procedure and the pintle reset. The inside of the throttle body where the pintle moves is clear of carbon deposits so I think it’s moving freely. I think it may be time to bite the bullet and take it into a mechanic to run a diagnostic. If you have any other ideas though I would be appreciative. Thanks again.