Weird Idle Problems, 98 4.6

just cleaned my throttle body, and i blew some cleaner into the egr hose as well. WHAT IS IN THAT BLACK BOX ON THE HOSE BEFORE THE MODULE ON THE TB?........Anyways i idled it for a bit to burn the cleaner off, and then went to the house....about an hour later i had to go somewhere........stang drove fine there, then on the way back as i was coming to a stop sighn the throttle seemed to stay open around 1500rpms even when i was stopped. it idled down soon after stopping,,,,,,,,at the time i thought i gad my foot on the accelerator and the brake at the same time as i was wearing my work boots. anyways it did the same thing as i pulled up to the house, and then it stayed idling high, loping from 900 to 1000. whats the solution for this? the tb was very dirty. do i need to reset the cpu? unplug the maf?

thats a very interesting concept. i noticed i large buildup of deposits in the ring where the butterfly valve stops and figured i would clean it. i owned a 97 crown vic and installed my brothers stock intake plenum and tb from his 02 gt. i probably cleaned it 20 or so times while i woned it and it never did that. same with the stock tb on the crown before the change over. i even bored out the little lips in the tb on both sides. never a problem. weird. i will drive it tommorow to work and see if it still persists. how long before the relearn?

fml! drove it 20m today........still doin it. time to buy a new tb? any suggestions?

it appeared to relearn. runs great. kept up with a new camaro today on the way home. would have beat him but i had a 250 lb coworker with me and a battery for his caddy in the back. lol! we were neck and neck the whole way but we both let of at 90 over the top of the hill.