1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Brake Pedal Goes to Floor When Starting Up

Discussion in 'Technical Chat' started by Biocal, Jan 30, 2010.

  1. Jan 30, 2010 at 11:46 AM
    #1
    Biocal

    Biocal [OP] New Member

    Joined:
    Jan 30, 2010
    Member:
    #30340
    Messages:
    3
    Gender:
    Male
    First Name:
    Morrill
    Marblehead
    Vehicle:
    2003 Tacoma
    On very cold mornings, teens and twenties, my brake pedal goes to the floor with little if any resistance when I first start the truck up.
    2003 Tacoma 4X4 Stock everything, daily driver
    It is not every time, I can go 2 to 5 days without it happening
    It only seems to occur when it is bitter cold out.
    Engine RPM is well above 1K
    After the first plunge to the floor, it will take 1 or perhaps 2 pumps to have pressure and the pedal has normal resistance
    The master cylinder was replaced by my mechanic. The problem never happened with my mechanic who thinks I am halucinating
    It has happened once while driving, very scary to have nothing on the pedal when coming off of the Mass Pike at speed. Yikes!
    The brakes feel normal (for a Tacoma) after that first drop to the floor.
    It's almost as if there is no power boost or vacuum assist but the RPMs are up well over 1K
    What can I look at?
    What can be replaced?
    What can I go back to my over paid mechanic with to have him fix?
    Has anyone else seen this problem?
    Should I go to the dealer? Which I hate doing!
     
  2. Jan 30, 2010 at 11:51 AM
    #2
    David Tarantino

    David Tarantino Well-Known Member

    Joined:
    Jun 20, 2008
    Member:
    #7428
    Messages:
    6,123
    Gender:
    Male
    N.J.
    Vehicle:
    08 tacoma
    1st welcome to T/W
    now are you looseing brake fluid
    when you pump up the brakes does it go to the floor slowly
    did anyone look at the wheel cyls
     
  3. Jan 30, 2010 at 12:09 PM
    #3
    Biocal

    Biocal [OP] New Member

    Joined:
    Jan 30, 2010
    Member:
    #30340
    Messages:
    3
    Gender:
    Male
    First Name:
    Morrill
    Marblehead
    Vehicle:
    2003 Tacoma
    There is no loss of brake fluid. 1st thing I checked.
    When I pump up the brake 1 or 2 pumps, the pedal does not go to the floor. I can then drive around Boston for hours and not have an issue. The brakes feel good and there is nothing wrong with the pedal.
    I am assuming that my mechanic took a look at the cylinders.
     
  4. Jan 30, 2010 at 3:50 PM
    #4
    David Tarantino

    David Tarantino Well-Known Member

    Joined:
    Jun 20, 2008
    Member:
    #7428
    Messages:
    6,123
    Gender:
    Male
    N.J.
    Vehicle:
    08 tacoma
    it could that there is air in the brakes from when the master was replaced
     
  5. Jan 31, 2010 at 8:44 AM
    #5
    Biocal

    Biocal [OP] New Member

    Joined:
    Jan 30, 2010
    Member:
    #30340
    Messages:
    3
    Gender:
    Male
    First Name:
    Morrill
    Marblehead
    Vehicle:
    2003 Tacoma
    The pedal going to the floor is why I had the master cylinder replaced. We thought there may be leakage between the primary and secondary piston. Replacing the master cylinder did nothing.
     
  6. Jan 31, 2010 at 10:22 AM
    #6
    pataco

    pataco Well-Known Member

    Joined:
    Jan 1, 2009
    Member:
    #12092
    Messages:
    2,070
    Gender:
    Male
    Down by the lake
    Vehicle:
    05 4x4 trd dc white
    FOX 2.0 RESIS,LRUCAS,BILLY 5100S ON THE REAR.MAGNAFLOW 11264,COLOR MATCHED GRILL,YELLOW FOG MOD.OVER HEAD DVD,FEDERAL COURAGIA M/T
    what are the odds you got another bad m/c?i no the odds are low BUT it does happen.just a thought.
     
To Top