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Thread: 20v Brake Booster Vacuum Problems

  1. #1
    Senior Member Shiri's Avatar
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    Hey All,

    Hoping some of you can put an end to this missery i've put up with on my 20v install.

    This whole setup was running previously fine in a sprinter and was just taken out and put in mine... however problems arise from my install...

    excuse the shitty drawing but it's just used to give you some idea



    On a 20v there are 2 points you can plug the brake booster into... the vacuum point 1 or vacuum point 2 which are at either end of the throttles... This setup used a t-joint system previously where the hose that is now blocked (on the diagram) was hooked up to vacuum point 2.

    However when i run this system with the brake booster hooked up to the t-joint the engine just stops itself... At the moment the brake booster is hooked up to vacuum point 2... however this leaves this t-joint open, making a lot of vacuum noise which is rather annoying, its also leads me to believe that throttle 4 will be running on less vacuum and possible damaging the engine....

    If this is indeed a ISCV problem, why was it running fine on the previous engine? the old owner doesn't remember... so please maybe you guys can?

    Thanks!

    Shiri

  2. #2
    Oldschool Member
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    it will be stalling because on the open hose end, i assume its a silvertop? plumb the 2 lines to the t piece the the open end to the booster.

  3. #3
    Senior Member Shiri's Avatar
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    As i said, when i hook up the brake booster to the open end of the t-joint when both hoses are connected to vacuum point 1 and 2, it just stops the engine...

  4. #4
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    hook it up like this:



    and make sure you use a one way valve off the booster

  5. #5
    Senior Member Shiri's Avatar
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    I can only assume that's how it was running in the old setup steve... which i have tried using on mine... but running like that causes the engine to just die.

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