Vacuum source. butterfly?

[j0nbunklah0m]

JDM b16a. Not sure where this hooks up to. but it idles better when blocked off..?
223713

[j0nbunklah0m]

is it ok to just block it off?

[bam-bam]

That hooks to the intake (air filter arm) right next to the throttle dashpot vac. hose.

I'm not real clear on why that bypass is there- it appears that if it senses a vacuum in the intake arm(or maybe a differential between before/after the throttle plate?) it opens to allow some air to bypass the butterfly, raising the idle a little bit. Note that its big hose is pulling air from the EACV supply passage and routing it directly to the plenum. I just went out in the yard and looked at 9 different manifolds. Half have it, half don't.

Fwiw, my b16a doesn't have one. It's the early version with the 2 O2 sensors.

[bam-bam]

is it ok to just block it off?

Yes, but if you want to be sure it's not messing with your idle, block off the big hose on both ends.

[Black4DrEK]

You can take that BS off man..

[j0nbunklah0m]

http://s31.photobucket.com/albums/c362/j0nbunklah0my/?action=view&current=video-2010-04-04-16-59-02.flv

heres a vid of it

[.:Stirfry:.]

yea take it off. you can find a lil block off plate on ebay for that.

[jdm-civic]

thats for the automatic tranny b16's. it slows the throttle from closing too fast, its useless now so take it off and get a adapter plate for it or just cap the opening

[G.C]

http://s31.photobucket.com/albums/c362/j0nbunklah0my/?action=view&current=video-2010-04-04-16-59-02.flv

heres a vid of it

dumb.

[Asanders160]

that is for and automatic. just block it off or get rid of it.