brake pedal started going to the floor

2003 FORD TAURUS
90,000 MILES • 6 CYL • FWD • AUTOMATIC
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36JOHN
  • MEMBER
  • 1 POST
The brake pedal started going to the floor( evidence of leakage from rear of master cylinder also), so i replaced the master cylinder( I bench bled it) The problem continued so I replaced it one more time. Same thing. When the engine is off I can pump the brakes up to a good height and pressure. As soon as the engine is stared the pedal falls to the floor. No leaks were detected around the wheels.
Feb 21, 2010 at 10:30 AM
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BMRFIXIT
  • ✓Experienced Mechanic
  • 19,053 POSTS
Hello,


This is common when the ABS system needs to be bleed as well you will need a scanner that can open the ABS valves to allow the air out. Here is a guide as well.

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


Please run down this guide and report back.
Apr 5, 2021 at 5:02 AM
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PPINNETTI
  • MEMBER
  • 7 POSTS
had to get the ABS valves opened worked great!
Apr 5, 2021 at 5:02 AM
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