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Thread: Vacuum source. butterfly?

  1. #1
    Oh yeaaaaa j0nbunklah0m's Avatar
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    Default Vacuum source. butterfly?

    JDM b16a. Not sure where this hooks up to. but it idles better when blocked off..?
    -0404101127a_223065-jpeg

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    Oh yeaaaaa j0nbunklah0m's Avatar
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    is it ok to just block it off?

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    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.
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    Quote Originally Posted by j0nbunklah0m View Post
    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.
    With or without religion, you would have good people doing good things and evil people doing evil things. But for good people to do evil things, that takes religion. - Steven Weinberg

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    You can take that BS off man..

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    Oh yeaaaaa j0nbunklah0m's Avatar
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  7. #7
    aye bro .:Stirfry:.'s Avatar
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    yea take it off. you can find a lil block off plate on ebay for that.

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    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
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    Senior Member G.C's Avatar
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    Quote Originally Posted by j0nbunklah0m View Post
    dumb.
    :idb:

  10. #10

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

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