Pedal travels to the floor when braking?

Tiny
JACKTAMPS
  • MEMBER
  • 2012 SEAT IBIZA
  • 108,000 MILES
Pedal travels to the floor when braking and the brakes don’t work great, bleed brakes haven’t sorted it, when the car is off, and I press the brake pedal until it’s hard it stays hard for a bit before going down again does this mean my brake booster is gone?
Tuesday, October 15th, 2024 AT 9:55 AM

9 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,584 POSTS
Does the booster make a hissing sound while driving, if not it is probably okay. It sounds more like the brake master has gone bad, or you have a seized caliper slide.

Please go over these two guides and get back to me:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

And this can make the pedal go to the floor as well:

https://www.2carpros.com/articles/discover-why-automotive-brake-pads-wear-unevenly

Let us know what you find.
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Tuesday, October 15th, 2024 AT 11:48 AM
Tiny
JACKTAMPS
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I have taken off both callipers and can push back the pistons in them
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Thursday, October 24th, 2024 AT 7:12 AM
Tiny
KEN L
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Did you look at the guide? It would be the caliper slides you are checking, also if they are okay I would replace the brake master cylinder.
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Thursday, October 24th, 2024 AT 9:45 AM
Tiny
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I’ve replaced the master cylinder still getting the same issue.
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Friday, November 1st, 2024 AT 9:28 AM
Tiny
KEN L
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Can I ask if the brake pedal is good if you pump it, or does it just go to the floor all the time?
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Friday, November 1st, 2024 AT 11:38 AM
Tiny
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When I’m driving it if I press it a few times the brake seems to feel better.
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Friday, November 1st, 2024 AT 12:31 PM
Tiny
KEN L
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To check if the booster is okay, with the engine off pull the vacuum line from the booter and you should hear air escape, if not the booster is bad. I would again check the caliper slides, not the piston. Can you upload images of the caliper so I can see what I am dealing with?
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Saturday, November 2nd, 2024 AT 9:06 AM
Tiny
JACKTAMPS
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Yeah, I can hear air escape when I disconnect the pipe going to the booster and with the piston pushed back should I have a bit of movement in the Caliper to tell me the slides are okay I’ve had both the calipers off, and the slides come out fine.
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Tuesday, November 5th, 2024 AT 8:00 AM
Tiny
KEN L
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Thanks for the images, it looks like you have the calipers on the wrong side, the bleeder should be at the top.
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Tuesday, November 5th, 2024 AT 10:31 AM

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