[BroncoGlenn]

It comes off the turbo X pipe above the orange boots.

 

[RT]

Intake air temperature sensor (switch) - Ford part F6SZ12A697A.

 

[Maryland dieselnick]

RT did not eat his Wheaties. That is your MAT sensor (manifold air temp). Intake air temp is in the air cleaner box in the bottom. They use another sensor to measure air temp in the turbo's compressor manifold as the air gets heated up by the turbo.

 

[RT]

I'll have to buy a box. Ford calls it an Air Charge Temperature Sensor. It differentiates between the one in the air box and the one in the Y pipe.

 

[Maryland dieselnick]

This is the push and twist sensor in bottom if your air box. It's in the rear.

 

[Maryland dieselnick]

This is your MAT sensor mounted in the compressor manifold, pictured in your photo.

 

[Maryland dieselnick]

In the picture it says only Econolines have it. That is because that manual was printed in early 99. F series have it.
This is the sensor I fought four almost a year to be added to the PID list on AE along with the missing left front sensor. It can now be viewed on AaE Giotto.

IAT Intake air temp is used to determine the outside air temp to set the cold idle rpm and ebv system

MAT is manifold air pressure down stream of the turbo and it's hot compressed air, hot being hotter than ambient anyway and can get into the 100s of degrees. The PCM adjust fueling from this input.

I'm a Granola guy.lol

 

[BroncoGlenn]

Thanks all. There's a very slight seepage of air from the center of it. Probably not enough to effect boost but these things don't get better with time.