I think you are confused, sir. As I mentioned, I own a horse. I work in Ford's top secret crouching dragon facility on 39th (you've probably never heard of it). An IAT works on a resistive basis, as the temperature rises, the sensor gets lazier and lazier. Finally, when the sensor quits its job and goes on unemployment, the ECM enters closed loop mode. Closed loop means that the protective sheild over the ECM covers its energy loop at its core (like the deathstar in star wars) the ECM will be destroyed if the loop is breached. I was just kidding about the magic, most of the people on this forum are stupid enough to beleive it though. The only sensors that use magic are the Mitsubishi Optisparks.. now whats magic!! No contacts whatsoever!!!!!!!11! I remember back in 93, the LT1 Mustangs and Explorers had alot of problems with their optispark distributors, I dont know why Ford ever put that engine in the Viper with all the problems they had but thats besides the point. The opti loop of the distributor was breached (often by jedi) and the car would stall. If you actually look at the date this thread was started, that was the day I started engineering for Ford. I had my PE license at age 17, my dad owns a dealership.. pulled some strings and I'm now a licensed engineer!