I tried searching but couldn't find an answer. I have a 91 Teg with a B20. It idles between 1.5K and 2.5K. I unplugged my IACV and the idle dropped down to around 1.2k but was still lumpy. I took off my intake and found that the lower hole inside my throttle body is sucking in air. Anyone know where that hole leads to, and what it may be attached to? Anyone have an idea if I could have a vacuum leak somewhere?

Any input is appreciated. TIA