The slant idle gets stuck??

After rereading your original post it sounds more like you need to take the carb apart and blow it out. The fast idle cam is easy to see and diagnose, mine always hangs up after applying the choke on a cold start. WD40 fixes it for a while but it always does it again, I think I need to take it off and clean and/or polish the sticky parts that are supposed to slip and slide