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Thread: Help me name that line

  1. #1
    Join Date
    Mar 2019
    Location
    Georgia
    Posts
    22
    My Cars
    325Ci

    Help me name that line

    There’s a vacuum line with an unknown connection right behind my intake manifold. It’s located on the top side of a connector that extends from the wiring harness all the way across over to what appears is the second air pump. Does anyone know what this vacuum line connects to?

  2. #2
    Join Date
    Jan 2005
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    Japan
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    54,655
    My Cars
    11/88 E32 750iL+98 E36M3
    Built year/month, model? Did you check in realoem? http://www.realoem.com/bmw/select.do

    My Cars: 325Ci
    please add the details = Built year/month, model
    Shogun tricks and tips for the E32 series are HERE!

  3. #3
    Join Date
    Mar 2019
    Location
    Georgia
    Posts
    22
    My Cars
    325Ci
    2002 325Ci

  4. #4
    Join Date
    Jun 2002
    Location
    Aberdeen, NC (yes, again)
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    23,673
    My Cars
    E39M5, E500 4WD
    It connects from the secondary air valve to the secondary air control solenoid.

    Chris Powell
    Racer and Instructor since, well. decades, ok?
    Master Auto Tech, owner of German Motors of Aberdeen
    BMWCCA 274412
    German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471

  5. #5
    Join Date
    Mar 2019
    Location
    Georgia
    Posts
    22
    My Cars
    325Ci
    The secondary air valve side is connected. The vacuum line is about 6 inches long and less than 1 cm thick. Would that connect to the backside of the intake?

  6. #6
    Join Date
    Mar 2019
    Location
    Georgia
    Posts
    22
    My Cars
    325Ci
    And could this also cause a slight rattle at idle only? Noise wasn’t there before working on the car. Replaced intake manifold gasket and PCV valve which got rid of misfires and stalling. Only issue now is slight rough idle and the duh-duh-duh-duh noise that goes away when accelerator is depressed.

  7. #7
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,933
    My Cars
    2018 BMW M240i
    The first step in diagnosing a problem is to scan the car for codes.

  8. #8
    Join Date
    Mar 2019
    Location
    Georgia
    Posts
    22
    My Cars
    325Ci
    No CEL

  9. #9
    Join Date
    Jan 2007
    Location
    .
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    .
    No CEL is different that not having any stored codes. There are codes that can be stored without turning on the CEL.
    ASE and BMW Master Certified Technician

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