S14 brake booster replacement

Thread in 'Technical Questions' started by Shimon Deosaran, Feb 10, 2019.

  1. Shimon Deosaran

    Shimon Deosaran New Member

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    Good day


    The brake booster on my s14a is not working. I tried using an r33 GTST brake booster but that booster is faulty. Currently where I’m from (Trinidad and Tobago) my options are an r33 GTR and the s15 Brake booster. Which booster should I use? Or what is the recommended brake booster that should be used with this setup?

    The car has the following:

    -R33 GTST brakes front and rare
    - HFM bm57 17/16 bmc.
     
  2. stevieturbo

    stevieturbo Member

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    Would seem very strange for you to have 2 faulty units, they are all usually very reliable.

    What is actually wrong ? Are they leaking or something ?
     
  3. Shimon Deosaran

    Shimon Deosaran New Member

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    Thank you for your response I appreciate it.


    What is actually wrong is that I have to pump the brake peddle to actually get pressure for the brakes to work.

    If the brake peddle isn’t pumped the peddle will go to the floor and the pads don’t get enough pressure to stop the car.

    I thought it was the s14 bmc but I replaced it with the HFM BM57 bmc and upgraded to the r33gtst calipers front and rear. The new bmc did not fix the problem.
     
  4. Ikeaaxel

    Ikeaaxel Member

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    Sounds more like you have air in your system or your BMC is leaking than a booster issue if you have to pump the brakes to get them to build pressure
     
  5. tomsheen

    tomsheen Active Member

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    Exactly what I was going to say.
     
  6. Shimon Deosaran

    Shimon Deosaran New Member

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    Thank you for your responses, I will bleed the system today.
     
  7. Shimon Deosaran

    Shimon Deosaran New Member

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    Replacing the bmc did not fix the problem. We found that the relay is not working for the abs pump.

    C95AE916-3CD9-4076-97FB-DE934DC8C914.

    9981625F-A843-4088-85A9-988D0E611C00.
     
    #7 Shimon Deosaran, Feb 12, 2019
    Last edited: Feb 12, 2019

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