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Thread: D2 V8 brake servo and vacuum pressure

  1. 6th February 2011, 09:24 AM #1
    alanbettison
    alanbettison is offline Master
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    D2 V8 brake servo and vacuum pressure

    I have been advised the brake vacuum pressure should be 17 in of Hg

    At the moment I am only pulling 14 - 15

    Master cylinder has been changed and the brakes have had a abs pump bleed

    Any advice please

    thanks
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  2. 6th February 2011, 07:07 PM #2
    jiri_j
    jiri_j is offline Fossicker
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    Hi there,

    where did you measure vacuum? At the inlet manifold by pulling out the servo hose? My reading was 15 as well. However, the value of 17 is for 0m above the sea level, and for every 1000 feet you have to add 1 in-Hg. Hope that after the correction you will be happy :-)

    BTW did you try to measure the inlet manifold vacuum when the throttle is suddenly opened and closed? What are your readings?

    Regards
    Jiri
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  3. 7th February 2011, 07:21 AM #3
    alanbettison
    alanbettison is offline Master
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    Servo vacuum

    Dear Jiri J

    thanks for your reply

    we are 13 - 61 m above sea level

    No I haven't measured the inlet manifold pressure yet

    The big question for me is what are you brakes like with the pressure @ 15, cos mine are crap

    and if yours were bad, what did you do to fix

    thanks
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