So I went ahead and tried the o ring fix on my iac valve to cure very high rpm's on startup. It would rev up to 1800+ rpm and slowly drop to normal in about 4 minutes. I had read that the fix works for some, but not for others, and I have an idea why.
I initally tried to remove the valve with the TB still on, but immediately stripped the lower screw. I then sourced two bolts to replace the screws, and removed the TB to get at the stripped screw. A vise grip solved it, and I am glad to have bolts in there instead of soft headed phillips head screws.
Anyway, I pulled the valve off and disassembled it per the article here:
http://web.archive.org/web/200106271...fast_idle.html
I noticed when I put the two o rings on the shaft, and reassembled the valve, that the spring wouldn't seat right on the o rings and would try to push over them. Upon inspection I noticed the spring is supposed to be seated back farther than where the o rings sit in the below picture.
Once I stretched the o rings and seated them where the red arrow shows, the spring sits where it is supposed to and the o rings effectively space the spring out. This has solved my high idle, it now revs to about 1200 for a second, and quickly drops to about 900 for a minute or so, then to around 700. I can now actually get in and drive without waiting for 4 plus minutes for the idle to lessen. The startup rattle is also gone. I think that a lot of people were placing the o rings where the picture in the article shows, instead of further back on the shaft.