hello, this is a b16a2 in my civic and
i have this hose plug that has a strong suction to it..
i dont know where it goes..
heard someone said it goes to the vacuum canister but i took out the charcoal canister already so where does it go now?
my motor is now idling up and down rapidlly.. from 500-2000 rpm
is this the problem?
any help would really help thanks

 

if you don't need it just "T" it into the brake booster line or cap it off

 

it has a really strong suction to it.. idk wat it is for