IAC Valve Test?

I just did the isolator bolt fix and that seems to have fixed my lean condition but I still am having a cold weather stalling problem.

Essentially, the engine (2000 3.8) will stall immediately when I take my foot off the gas when it is approx. 40-deg F or lower. If I let it warm up for 5 mins or so it eventually stops and runs and idles fine. On cooler days (40-50 deg F) it won't stall completely but the revs drop to around 500 or so and will sometimes bounce back and forth between 500-1000. When the revs drop so low the battery light comes on before stalling.

Based on my reading here on AF I tried cleaning the IAC but that doesn't seem to have done anything. Is there a way to actually test the IAC before plunking down the $$ for a new one without knowing for sure if this is the problem?

Also, does anyone know what the PCM reflash does that is associated with TSB 03-16-1? I haven't had this done and wonder if I should, from reading here it appears most do not get this done.

Thanks!
Ed

OK, I found this site and am posting here for reference. This seems to be a pretty comprehensive electrical test for your IAC Valve to determine if it is bad and needs replaced or just needs cleaned.

http://www.ford-trucks.com/article/idx/0/170/article/Ford_Explorer_IAC_Fix.html

Nice! I'll have to bookmark that site for future reference. Thanks for finding that one.