What sensor is this? 3sgte in a st, Noobish i know, but not sure how it ended like this Options

[eggman40]

I recently got a new air fuel gauge and ive been monitoring the car for a week now. At first it was running fine, just a little bit rich but not out of the ordinary. As of monday though, the car has been running REALLY rich and the weird thing is my BOV doesnt sound off as loud as it did last week! Im still boosting correctly but the sound is not as piecing as it was. even at wot you could bearly hear it now.



Any way i wen into the engine bay, looking for a loose vac line and i found this:









Im not sure why its loose or if it was attatched to something to begin with. the hose you see was just dangling. I dont remember this when i was doing the swap Anyway, what does it do? is it crucial? or is my problem elsewhere? any help is appriciated. Thanks!

[lagos]

your motor must be from an mr2?

it kind of looks like the AC idle up valve, but not 100% the same as the one i have. it would normally go to a round valve that goes to the intake manfold, if thats what it is.

[eggman40]

your motor must be from an mr2?

it kind of looks like the AC idle up valve, but not 100% the same as the one i have. it would normally go to a round valve that goes to the intake manfold, if thats what it is.

well theres a start. No, my motor is from a 92 JDM alltrac. If it is the AC idle valve, does it have to do with the cars idle? becuase right now my motor is idling high? Im gonna try to research this more, now that i have a name. Thanks