I'm currently working on a JDM 1991 GT-Four RC. The engine has been out of the car for roughly 8 months and I'm in the process of installing it back in the car.
I can't remember what this part is/where it goes. Anybody have an idea what this part is?
There is no electrical connector on it. One end looks like a breather hose/vent hose of some sort connected to a black cylinder with an arrow drawn on it (appears to indicate flow direction?). The other end of the cylinder has a long piece of hose connected to it with 2 little black adapters on them, the adapters are labeled "Koito". There is no other writing on it.
Here is an imgur album because the images are larger than what the board supports.https://imgur.com/a/YltUNCI