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rebuilt top end. need help with vacuum routing on 95 taco 2.7l 3rz

Discussion in '1st Gen. Tacomas (1995-2004)' started by Crash.HM, Sep 10, 2018.

  1. Sep 10, 2018 at 9:28 PM
    #1
    Crash.HM

    Crash.HM [OP] Member

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    https://photos.app.goo.gl/SjQGvZuLtPoBP6vt6
    I'm trying to figure out the where these hoses go. Some how I missed them when I was marking everything.

    The one circled in blue used to be clipped next to the ABS module as shown with the red line.

    The two connections circled in red: The hose comes off the bottom of the throttle body, but I'm not sure that it connects to the vacuum pot for the EGR which is the open connection in the circle.thoughts?

    Also some pictures of of 2.7s in the manifold area wouldn't hurt just for general reference.

    Thanks.

    vac hose 2.jpg
    vac hose.jpg
     

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    Last edited: Sep 10, 2018
    b.a. likes this.
  2. Sep 11, 2018 at 6:30 AM
    #2
    Wsidr1

    Wsidr1 Well-Known Member

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    @Crash.HM
    My 1995 2.7L Auto without ABS, so not sure how much they will help. That creates some differences. In the last pic, ignore the fact that my ADD vacuum switch is hanging there out of place in the lower center. Original switch went bad and the racket was so rusted I left the old one in and the replacement is just hanging there.
    20180911_080053.jpg 20180911_080112.jpg 20180911_080128.jpg 20180911_080138.jpg 20180911_081410.jpg 20180911_081505.jpg
     
  3. Sep 12, 2018 at 8:41 PM
    #3
    Crash.HM

    Crash.HM [OP] Member

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    Thanks for the pics.

    The tube next to the vacuum pot goes to the pot. I still have no idea where that plugged line goes.

    Tried to start the truck today. It occasionally fired but never started up and the check engine light is on. on the plus side it wasn't spewing fluids for an open tube.
     
  4. Sep 13, 2018 at 12:07 AM
    #4
    DrZ

    DrZ Well-Known Member

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    Do you still have the vacuum diagram sticker on the underside of the hood?

    The hose circled in red looks like a coolant line. The coolant goes to the EGR valve (1st hose), out of the EGR valve to the IAC valve under the throttle body (2nd hose), and back to a bigger coolant pipe (3rd hose). Every few months someone posts asking about these hoses, so try doing a search for more pictures.
     
  5. Sep 15, 2018 at 9:05 AM
    #5
    Crash.HM

    Crash.HM [OP] Member

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    thanks for info. I will do some searching. I do still have the sticker and looks like everything on the sticker was hooked up right.
     
  6. Jun 25, 2025 at 6:45 PM
    #6
    b.a.

    b.a. Active Member

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    1997 4wd 2.7l tacoma
    Hello yall!!! This is sooo old but im having the exact issue with the hose circled in red. There is no coolant coming out of it, ive been flushing the system.
    Wheeerreeeee does it go????!?!??!?

    20250625_114101.jpg
     

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