Everyone's posts here are probably very helpful and right-on. I'd like to add one that is more a matter of process than anything. Having been in your shoes but with a different car and different issue, I learned a hard lesson.

First, DO go into the long story of why you touched the throttle if you were trying to solve something. Map-out EVERYTHING you did before the problem occured. Put it on this site. Root cause analysis is, despite what local mechanics argue, very helpful. They treat the symptom, you want to treat the cause. Did you change a filter, move a hose, do anything? What other problem did you think you had, idle, something? Map-out everything that came before it if anything. In my case, there was something I did before that cause my problem but it was not at all obvious that this would have been the cause.