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Thread: I found a vacuum line just hanging there

  1. #1

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    05-07-2019
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    Location

    Rathdrum
    Vehicle

    1980 Dodge D-50
    Engine

    I.D.K.?

    I found a vacuum line just hanging there

    While warming my 1980 up I found this vacuum line just hanging out. It hooks to the intake manifold under the carb and I couldn't find a place where it should plug in. In the pic my finger is under it and it's where it plugs into the manifold. (It's not the one with the green marks on it). It definitely has suction and the truck idles a little rough. I looked all over and couldn't find a port that it goes on.Click image for larger version. 

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  2. #2




    Array
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    03-20-2011
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    4,691
    Location

    Pittsburgh, PA
    Vehicle

    1980 Dodge D-50
    Engine

    G54B
    attach a vacuum gauge to it and rev up the engine - if the reading is high at idle and drops when you rev it up, it is manifold vacuum. If it is low, and rises when you rev it up - it is ported vacuum. Do this test with engine at operating temperature.
    Pennyman1
    The best Dodge that Dodge never made
    Living the D-50 lifestyle since 1980

  3. #3

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    05-01-2018
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    258
    Location

    Kailua, HI
    Vehicle

    1986 Dodge Power Ram 50
    Engine

    G54B
    Got a vacuum line routing sticker on the engine compartment hood..? The green stripe is a key identifier but I don't have the answer... I have a factory service manual for 1986 Ram 50 (it's not at the house right now; perhaps it has a clue..?) You'll get it figured out sooner or later; need a few more pro's to chime in...

  4. #4

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    01-24-2017
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    650
    Location

    New Zealand
    Vehicle

    1981 Mitsubishi L200
    Engine

    Other
    looks like its the intake manifold vacuum hose. i believe it plugs into the air bleed valve on the underside of the air cleaner

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