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Mustang67408 - I have to tell you, you're a hell of a great person to spend the time to help us do-it-yourself folks. Thanks a heck of a lot!

Since I posted last Sep re: a P0505 code I had. Seems it's pretty common. Had to hold the throttle open when idling. I exposed the throttle body and cleaned it pretty thoroughly with 3M throttle body cleaner and afterwards, the Idle Control worked a hell of a lot better. However, since then (and I've only driven it about 40miles since) it starts and idles up okay - idle control up here in chilly Maine is definitely working again. But after driving home from work about 7 miles, engine's warms and the idle is somewhat higher and hunts a little. Light's still on but I haven't tried resetting and based on what I'm experiencing, bet it'll come on again.

Any thoughts on the hunting issue? I'm thinking either:

(1) I didn't clean the TB as good as I could have because cleaning obviously did something. About a year ago, I had the air filter replaced during an oil change and the bubbas didn't connect the bonnet back on correctly. So essentially, I was sucking in raw air and dirt. If so, how tough is it to remove and clean?
(2) The ECU is trying to relearn after the cleaning.
(3) It really is a bad Idle Control Sensor.

Seems weird that it's hunting after it's warmed up. I've got your cip0505.pdf file but thought I'd ask if you had any idea before I dig further.

Thanks again Mustang. Super, super resource for info.

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