My wife's 97 Contour Sport ATX was idling kinda crappy, so I wing over to NAPA and buy a new IAC for $45. I swap it in, and immediately is born the most obnoxious moose you ever heard! Summinabich. I reset the computer. Still moose. I drive it around. Still moose. Uncle. I quickly clean up the old IAC and swap it back in. Moose gone without a trace... What gives?