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Thread: JDM bigport 4age vac lines

  1. #1
    Veteran evil86's Avatar
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    Default JDM bigport 4age vac lines


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    hey guys, im in the middle of a 4age conversion and i got hanging vac lines lying around should i t piece all the lines ups. i got tvis vac lines, vac lines in far top right on engine bay at the wire wall, canistor line and some other random ones. any recommendations

  • #2
    Veteran Jonny Rochester's Avatar
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    I recomend you learn what all of them do, and hook them up. I know it's a bit daunting and looks like a birds next at first, but treat it as 1 system at a time.

    Learn just 1 system and how it works, then hook up the related vacuum lines. In the meantime, block off any unused holes so the motor will run and not suck air.

    Systems:
    -fuel pressure control
    -fuel vapour control
    -T-IVS
    -EGR (4A-GEC only)
    -PCV
    -MAP sensor
    -... and others

    Some systems only require 1 hose.

  • #3
    Veteran Jonny Rochester's Avatar
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    First off, there is a fitting screwed to the intake manifold that has provision for 3 vacuum lines. It is called a vacuum filter. 1 or the outlets should be blocked off with a condom thing, another has a hose going to the MAP sensor, and the other has a hose going to the fuel pressure regulator.

  • #4
    Veteran Jonny Rochester's Avatar
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    There is 1 vacuum line going from the charcol canister to a port on the throttle body.

  • #5
    Veteran evil86's Avatar
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    kinda get what ur saying, can u please post a pic. thanks buddy

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