deafsmogtech
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sound like you spell it for MAT (Manifold Air Temp)?. Anyway IAT (Intake AirOh that's right. I think It's MAF that's where I find it between air filter and engine.
Too much words for my memory. (sob)
Temp) sensor that you mentioned above this post. MAT sensors are not using to address in OBD-II bible much. They're OBD-I sensors and usually located in the intake manifolds. IAT sensor can locate in the manifold or air duct/box even inside MAF sensor that's what you saw erratic reading in FFD?