As you can see from the pic, I have 200k, 20k and 2k followed by 200 with the 'beep' symbol. I tested it on the 2k graduation and got the .012. I tried the 200 also and got a constant 'beep' and I think the reading was 7. And yes, I tested both ways, red lead on one terminal and black lead on the other then, I swapped the leads and got the same readings.
I noticed this morning when I started it up, the problem seems to have gone away! It fires and runs about 1100 rpm then drops after a few seconds to about 800. I guess the cleaning helped it. I do notice however, that once it gets to 800, there's a surging idle. Probably 100 rpm in each direction. I'll bet that has something to do with that old, dirty IAC! Cheapest Motorcraft I've found seems to be RockAuto @ $61 shipped. I think I'll just bite the bullet and go for a new one. wbrockstar, you are a wealth of knowledge! Thank you very much! Thanks to others who chimed in, also!
You can try doing a base idle reset now or wait until you get/install the new iac. Anytime the base idle is set above 650rpm,w/ iac harness disconnected, surging issues can begin.This may/may not be your issue.The following copied/pasted instructions should help.
Summarized/Corrected Base Idle Reset version
1) Clean TB with carb cleaner and nylon brush (if needed) Engine off, fully open TB blade and spray/brush TB until all gunk and oil residue is cleaned.
2) Allow to dry, or close TB blade and start engine until it clears all carb cleaner fumes/liquid.
3) Remove the spout plug,just to make sure the ecu doesn't have any input on timing during the reset procedure.Let engine idle...if it doesn't, increase idle speed via TB stop screw until engine stays idling on its own.
4) Disconnect IAC valve, if engine dies repeat 3 with IAC disconnected.
5) Set idle speed to the lowest setting possible between 550-700 rpms with IAC disconnected. It is key to use the lowest possible to prevent idle surge, rolling, etc once the IAC is connected as follows.
6) Turn engine off, and reconnect IAC
7) With Ign On Eng Off, check TPS voltage output....if it's between .7vdc - 1.0vdc, it's OK. This voltage check should be done between the Green and Black wires at the TPS side connector as shown in the pic below....(-) terminal of the DVOM on the Black wire and (+) terminal on the Green wire.
8) Disconnect battery (-) for 3-5 minutes.
9) Reconnect battery, start engine, allow it to idle for 2-4 minutes to confirm setup,
10) If idle speed falls too low or stalls, increase idle speed via the TB set screw a little at a time.
11) Turn engine off for 20 seconds, re-start engine and repeat 9 - 11 if required.
12) Reconfirm TPS output is within .70 - 1.0vdc range.......you're done!...
..no need to reset ECM KAM (reset computer) b/c the TPS minimum value used for idle control, is automatically reset by the EEC-IV every time the ign is cycled on-off for 20 seconds-on, and as explained in the next post
13) Allow a 10-20 minute "relearning" period under normal driving conditions (drive cycle).....now you're done.