brake pedal goes to the floor?

1997 TOYOTA 4RUNNER
269,000 MILES • 3.4L • V6 • 2WD • AUTOMATIC
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E46KID
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  • 1 POST
i replaced the mater cylnder due to having no brake pressure and after replacement i bleed the brakes 4 times to make sure all the air is out of the system. i blead them in this order RR RL FR FL. and now if i lightly press the brakes the pedal will go to the floor but if i press hard on the brakes it will only go about half way and hold pressure fine. i have checked for leaks and have not found any. would a bad brake booster be the caues or do would i have a very small leak somewhere??
May 13, 2023 at 7:28 PM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
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A bad brake booster will not cause the pedal to go to the floor. Here is a guide to help can I ask if this truck has ABS if so, the ABS system valve need to be opened while bleeding, here is a video and guide to help. If you don't have ABS please check the caliper slides to make sure one is not seized up.

https://youtu.be/nQRnKyVyMuQ

and

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

Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
May 15, 2023 at 11:05 AM
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