Brake booster question

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  • PumpdUpKicks
    Advanced Member
    • Nov 2012
    • 140

    #1

    Brake booster question

    My E30 sat for over a year with a mess of problems, and now its time to tackle my brakes issue.
    My brake pedal has no pressure against it while im stepping on it, and not until the pedal is fully pressed to the floor will the brakes eventually work.
    My first question is does the brake booster keep constant vacuum? Im not 100% sure i have asking the question correctly, but i was attempting to seafoam my car through the vacuum line coming off the brake booster, the hose that connects booster to the check valve was a PITA, so i just disconnected the rubber hose, and put a cone with flex hose to be able to pour seafoam slowly into it, but the brake booster was not creating any vacuum.
    so again, if the brake booster isnt creating a vacuum, could that be the cause of the brake pedal being soft?
  • Todd Black 88
    No R3VLimiter
    • Oct 2007
    • 3449

    #2
    Without booster vacuum, it would feel how it feels when he car is off. Hard.
    Your soft pedal is probably a bad m/c
    Originally posted by codyep3
    I hope to Christ you have looks going for you, because you sure as fuck don't have any intelligence.
    2001 silver/Blk 325 cabby. SOLD
    1988 Blk/Blk e30 factory wide body kit car SOLD
    1992 DS/BLK 325 m-tech II apperance pack cabby SOLD!
    2002 325xit Sil/blk. SOLD
    2012 328i xdrive touring. Wht/blk. SOLD
    2009 135 cabby. monacoblue/blk leather SOLD
    2007 Z4m coupe. Silver grey/black/ aluminum. 1of50
    2010 F650gs twin
    2016 M235i cabby. Mineral grey/Red leather

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    • PumpdUpKicks
      Advanced Member
      • Nov 2012
      • 140

      #3
      Originally posted by Todd Black 88
      Without booster vacuum, it would feel how it feels when he car is off. Hard.
      Your soft pedal is probably a bad m/c
      ah ok thanks, now should there be vacuum coming from the booster when i have the hose off? for when i am adding seafoam.

      Comment

      • MR 325
        Moderator
        • Oct 2003
        • 37828

        #4
        Originally posted by PumpdUpKicks
        ah ok thanks, now should there be vacuum coming from the booster when i have the hose off?
        The booster doesn't make the vacuum. The engine does.
        BimmerHeads
        Classic BMW Specialists
        Grover Beach, CA

        www.BimmerHeads.com

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