What the heck is this?

[Universalshaman]

Hey guys, was dealing with a bit of a stalling issue on my truck a few weeks ago, it would stall when going into drive or reverse, tranny fluid is a little bit overfilled, maybe just 3/4 the cirumference of a pen past where it needs to be.

Did a few things, cleaned the TB, cleaned a couple sensors, truck doesn't seem to be stalling so much anymore, but when I was changing spark plugs on saturday I found this thing, has a hose running to it that runs to the bottom of where the throttle body bolts on, wondering if this is a filter or something that needs cleaning every now and again?

 

[jwheeler]

That's your pic valve. It just twists and comes out the top


Sent from my iPhone using Tapatalk

 

[Universalshaman]

What's it do? No maintenance required then? I tried twisting it and opening it up but it was in there pretty good, must be caked with dust from never being opened