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Missing vacuum hose from throttle body

Discussion in 'Wrangler YJ (1986-1995)' started by boucheryj, Jul 11, 2018.

  1. Jul 11, 2018 at 5:59 PM
    #1
    boucheryj

    boucheryj [OP] New Member

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    I just failed a smog test because I was missing a hose from the throttle body. Can anyone tell me what this valve is for?

    IMG_20180711_111016.jpg
     
  2. Jul 12, 2018 at 6:38 AM
    #2
    OFFGRID

    OFFGRID Well-Known Member

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    Howell fuel injection, header, HEI distributor, TH350, NP208, SOA lift with YJ springs in the front & GW springs in the Rear. AMC20 with G2 1 piece chromos trussed, Dana 30 with G2 chromos and 760x ujoints and MM Stainless Hubs, Geared 4.56. Tom Woods shafts, Metal cloaks, Caged, 37" Toyo MTs.
    What year is your YJ? 4cyl or 6cyl? Please circle what you want us to see so we are all on the same page.
     
  3. Jul 12, 2018 at 7:07 AM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine Moderator

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    Welcome aboard!
     
  4. Jul 12, 2018 at 8:20 AM
    #4
    Awrench

    Awrench Well-Known Member

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    some thoughts-
    how does jeep run?
    Did they say open vacuum line- just a visual issue OR
    some issue ie EGR*vacuum missing that would be easy.
    Would putting caps on vacuum connections be an answer? So easy -

    * EVAP, dist, trans, etc


    vac caps.jpg
     
    Last edited: Jul 12, 2018
    boucheryj [OP] and aggrex like this.
  5. Jul 12, 2018 at 9:26 AM
    #5
    aggrex

    aggrex Well-Known Member

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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Welcome! I'm a bit in awe that the tech fails the YJ on the smog test and points out the problem on a 23+ year old jeep.
     
  6. Jul 13, 2018 at 12:18 AM
    #6
    boucheryj

    boucheryj [OP] New Member

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    The technician didn't even know what the valve was for, and I looked at another yj and it doesn't even have the valve. I think the caps is the best bet.
     
  7. Jul 13, 2018 at 7:42 AM
    #7
    Awrench

    Awrench Well-Known Member

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    the jeep is running ok - then give the caps a try
    let us know -
     
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