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  1. #1
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    blue
    1998 Trans Am ls1

    air removal question

    So i removed the air pump and hoses as described here. I got a question that i cant find the answer to tho. As i pulled the big air hose off (the one with the tee fitting and goes from drivers side to passenger side) i noticed that a smaller hose came with it. (it was looped with a connector with the big hose) The smaller hose came from the drivers side from from a black nipple on top of the valve cover to a tee then two fittings on the passenger valve cover.(closer to the back of valve cover) Can someone please tell what these hoses are and what can i do with them? My car is a 98 ta

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/ mods, 00 FBVert

    post a pic....it's been awhile since I've seen EGR and Air system in my car....

  3. #3
    Senior Member SteveCZ28's Avatar
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    99 Chevrolet Camaro Z-28

    is it possible your talking about the pcv hoses?? they have nipples that go into the valva covers like you are saying here

  4. #4
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    2000 formula

    on the Divertor valve selnoid.....there are 2 nipples for vacum hoses....one hose goes to the back of the manifold....the other hose goes to the divertor valve (that T thingy) you can just plug the one nipple to the DV....or remove the DVS and plug the nipple behind the manifold......your choice.......(pick plug the nipple on DVS)

  5. #5
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    Quote Originally Posted by SMWS6TA View Post
    post a pic....it's been awhile since I've seen EGR and Air system in my car....
    I actually dont think its related to the egr or air system, it happened to come out when i pulled on the air line running behind the engine. Pcv? Vaccuum lines?

  6. #6
    Senior Member SteveCZ28's Avatar
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    Red
    99 Chevrolet Camaro Z-28

    theres only 2 vacuum lines on the intake in the back. one is for the brake booster, bout foot and a half long with angles bent into it, and about 1/2 inch inside diameter. and another is 1/8th inch line for the hvac

  7. #7
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    1998 Trans Am ls1

    Quote Originally Posted by sjsingle1 View Post
    on the Divertor valve selnoid.....there are 2 nipples for vacum hoses....one hose goes to the back of the manifold....the other hose goes to the divertor valve (that T thingy) you can just plug the one nipple to the DV....or remove the DVS and plug the nipple behind the manifold......your choice.......(pick plug the nipple on DVS)
    i dont recall a diverter solenoid on my car (keep in mind its a 98' it could be different than others) I cant also feel any nipples on the intake manifold. It seems to run from valve cove to valve cover...

  8. #8
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    silver
    2000 formula

    the HVAC line is T'd to go to the DVS .......mines a 2000

  9. #9
    Senior Member SteveCZ28's Avatar
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    Red
    99 Chevrolet Camaro Z-28

    if its valve cover to valve cover your feeling the pcv valve lines, it starts on the drivers side valve cover, comes over to the passenger valve cover then comes up and ties into the the intake behind the t.b

  10. #10
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    blue
    1998 Trans Am ls1

    also, its a very spongy, soft rubber hose with a plastic pipe running inside of it

  11. #11
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    silver
    2000 formula

    are we talkin egr...air...or PCV here???

  12. #12
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    Quote Originally Posted by SteveCZ28 View Post
    if its valve cover to valve cover your feeling the pcv valve lines, it starts on the drivers side valve cover, comes over to the passenger valve cover then comes up and ties into the the intake behind the t.b
    sounds like it! do i need to keep this or can i cap them?

  13. #13
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    1998 Trans Am ls1

    Quote Originally Posted by sjsingle1 View Post
    are we talkin egr...air...or PCV here???
    I actually dont think its related to the egr or air system, it happened to come out when i pulled on the air line running behind the engine.

  14. #14
    Senior Member SteveCZ28's Avatar
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    Red
    99 Chevrolet Camaro Z-28

    spongy line is 100% pcv line...its insulated

  15. #15
    Senior Member SteveCZ28's Avatar
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    99 Chevrolet Camaro Z-28

    im not sure if u can remove this completly or not..

  16. #16
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/ mods, 00 FBVert

    If it's connected to the TB, then yes you do. I ask for a pick because it would help clarify what you are looking at.

  17. #17
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    1998 Trans Am ls1

    Quote Originally Posted by SteveCZ28 View Post
    spongy line is 100% pcv line...its insulated
    your right steve, its a spongy line, but only to insulate the plastic prebent pipe inside of it. now that i have that figured out. what is the exact path for this hose/line?

  18. #18
    Senior Member SteveCZ28's Avatar
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    99 Chevrolet Camaro Z-28

    it is connected to a nipple behind the throttle body on the passenger side. and has little flat clips that connect into the manifold itself then a hose plugs into the nipple pointing towards the front of the car, then wraps around to the back of the intake and the plastic nipple will plug into the top right corner of the valve cover underneath the cowling
    i can get you a pic if needed. as my intake is off the car currently

  19. #19
    Senior Member SteveCZ28's Avatar
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    heres the hose, and how it plugs into everything







  20. #20
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    blue
    1998 Trans Am ls1

    thats it!! your ends/connections look a little different, but the hose is identical.

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