Question about Toyota Supra

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MY TOYOTA Supra 1987 non turbo , no anti lock, or ABS system on the brakes. My friend was travelling the freeway and brakes started to engage and couldnt get them to release. The car got towed from freeway, the attendant said brakes had released, drove fine for a number of miles then started to gradually apply and not let off. I pulled over and did the booster check , ok but pressure wasnt letting off until I backed out mthe stop screw on master cylinder. Do I need to replace the master it appears the fluid is leaking past plunger and spring is not returning the plunger.

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  • william cook Jul 29, 2010

    The system is not leaking at all , the fluid level remains the same but I feel the brakes getting spongy . Could brakefluid be leaking past the plunger system in the master cylinder?

  • william cook Jul 29, 2010

    Very I would give this and my previous answer the highest rating available. Job well done! God Bless!

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  • Master
  • 1,796 Answers

Hi!!

It sounds about right, your master cylinder is faulty and should be replaced ASAP. I wouldn't recommend driving the vehicle until repair is made.

Don't forget to rate this Post!! Good Luck!!

Posted on Jul 29, 2010

  • Rene J Solis Jul 29, 2010

    Replace the master cylinder and your problem will be fixed. I had same problem while ago, the plunger gave up and as soon as I touched the brake pedal lightly, the tires would lock-up.

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  • Master
  • 632 Answers

The master cylinder will need replacing if the leak is near that, It may be a leak in the brake line rather than the master cylinder itself.

Posted on Jul 28, 2010

  • Simon Swales
    Simon Swales Jul 29, 2010

    Oh OK spongy brakes is generally a sign of air in the brake line

    Take the steps to bleed the brake system and it will solve the problem.


    http://www.carbasics.co.uk/how_to_bleed_...


    That article will provide detailed help on bleeding brakes plus pictures to help in visual assistance, Sorry I didn't mention this first It wasn't specified that it wasn't a leak but spongy brakes.

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