Just looking around the cylinder head, I could not find anything that looked like the "K-Jetronic" water temp sensor as described in my previous post. I went ahead and ordered the idle air valve hose in question. With any luck it'll get here by the weekend, and I'll give an update on whether or not it worked. Otherwise, it'll be until next weekend before I get a chance to replace it and find out. Stay tuned.. heh
In the mean time, I'd appreciate any input or experiences of the like.