IAT Sensor .. What is it and what does it do? - Ford Mustang Forum

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post #1 of 4 (permalink) Old 10-04-2002 Thread Starter
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IAT. What is it?

What does this IAT I keep hearing about do? What does it do when you put in a different resistor?

Also, is it on all years of 5.0's, if not what years?

Last edited by ScottHalliday; 10-04-2002 at 03:46 AM.
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post #2 of 4 (permalink) Old 10-04-2002
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The IAT stands for Idle Air Temperature. Basically its a temperature sensor that the engine uses to make its decisions. Im not sure about the resistor trick, but i would assume it changes the voltage value and therefore alters what the computer reads. I could be wrong, but i think they came about the same time as Mass Air.

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post #3 of 4 (permalink) Old 10-04-2002
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I think I saw the resistor trick on another post. It fakes the computer out and makes it believe the air is colder than it truely is.

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post #4 of 4 (permalink) Old 10-04-2002
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[QUOTE]Originally posted by Vortex
[B]The IAT stands for Idle Air Temperature.

IAT stands for Intake Air Temp . It senses the temp of the incoming air.
The PCM uses the IAT value, to adjust fuel , ADD FUEL if it is cold
take fuel away when it is hot. The resistor fools the PCM into thinking thats the air is colder than it really is. So there is more fuel.

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