brake pedal falling to the floor..

htownwagonhtownwagon New Wagonist
in Suspension, Braking & Wheels
When I drive, and I hit the pedal, sometimes it will fall quickly to the floor and one of the front wheels will lock up until I let off the pedal...

Would I need to replace the master cylinder? It does the same in the rear at times also.I haven't opened the brakes up, so I don't think bleeding them would help

Comments

  • surferwagonsurferwagon Band Wagon
    It's the brake master cyclinder!
  • michaelhinkle1michaelhinkle1 Senior Wagonist
    surferwagon wrote:
    It's the brake master cyclinder!

    x2, happened to me.

    buy a new master cylinder, replace the old one, fill it up with fluid, bleed out the brakes, then replace the fluid again and you're good to go!

    :wink:
  • B18C5-EH2B18C5-EH2 Moderator
    It's most likely to be the brake master cylinder, but nobody can say for sure without actrually pulling the wheels off and checking the lines, calipers, and rear wheel cylinders for brake fluid leaks as well.

    An easy indicator of a bad brake master cylinder is seeing any fluid or peeling paint on the brake booster - if you've got that then you need a master cylinder, but that's not to say other issues couldn't also be contributing to the low pedal as well.
  • NJCIVICWAGON1NJCIVICWAGON1 Council Member
    B18C5-EH2 wrote:
    It's most likely to be the brake master cylinder, but nobody can say for sure without actrually pulling the wheels off and checking the lines, calipers, and rear wheel cylinders for brake fluid leaks as well.

    An easy indicator of a bad brake master cylinder is seeing any fluid or peeling paint on the brake booster - if you've got that then you need a master cylinder, but that's not to say other issues couldn't also be contributing to the low pedal as well.
    X2
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