Changing the air cleaner filter the other day and noticed this "sensor" attached to the front of the housing... What this for?

 

whats it look like, sometimes MAP sensor was attached to air cleaner bases, on some engines and some years

 

Well it looks like a sensor. I thas the brass wrench fitting with I believe one wire coming off it. The other side goes through the air cleaner canister and is white w/ open slits near the end. Aprox 1/8 to 1/4 in in dia.

 

I know this probalby isn't accurate/correct but, on TBI cars (only?), there is a sensor in the air filter housing which is (for the life of me I can't remember the name) the, I want to say, MAT (manifold air temp) sensor. For some reason I don't think that correct though (too lazy to go look it up too)
I have one on my 91 TBI and just drilled a new hole on the air cleaner base as close to the TB as I could. No ill effects so far.

 

IAT sensor i believe.

 

if you have the dual air filters on it, it is the MAT (manifold air temp) sensor, i had mine go bad last week. she aint the cheapest thing in the world either, lol

 

Not sure If I have duals. There is the round canister type filter on the front left side of the radiator ( looking from front to back) and then there is anouther rectangular plastic "housing" that sets on the top back side the radiator. Although I have never read/seen anything that states that is a cleaner too.