have same problem as danny ask. the pedal goes to floor when stopping. you can pump it up and it holds. no leaks found. fluid level is ok?
Dec 13, 2008 at 10:42 PM
ZACKMAN
✓Experienced Mechanic
4,202 POSTS
You do have a leak, vacuum leak in your master cylinder. Over time, the rubber seals fail and the pedal goes all the to the floor. If you pump it a few times, the seals create vacuum and your pedal is fine for a few times, and then it goes down again.
If you know how to rebuild the master cylinder, rebuild it. If not, get a re-manufactured one from your local parts store.