its a 1990 gtu. this is the tube beneath the intake tube. i was replacing the old hks filter with a new k&n. this tube was connected to the HKS filter, and was almost entirely closed off through the filter, due to design, not it being dirty.

what id this tube? do i have to worry about it? can i close it off? do i have to buy a small breather filter for it? what happens if i close it off? etc, etc

 

Is that your ACV exhaust hose & silencer?
Must not have an ACV, eh?

 

...circleing the tube in adobe now...

 

It looks like you are referring to the air pump hose?

 

It looks like you are referring to the air pump hose?

 

no idea

 

sorry double post

 

looks like the air pump hose

 

ok. can i close it off? whats it do?

 

breather filter

 

It pumps air to your exhaust intake and opens your aux ports.

 

closing it off is a bad idea then

 

I'm about to post on the opening of the aux ports with air pump removed so check that post- but other than that I believe no harm no foul. Greg C.

 

just pop a little air filter on it and then a big on for the AFM