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1994 Chevy S-10 Break Peddle goes to the floor

Tiny
DOUG_JANOWSKI
  • MEMBER
  • 1994 CHEVROLET S-10
Brakes problem
1994 Chevy S-10 6 cyl Two Wheel Drive Automatic

I changed the master cylinder, bled the system, changed the front break lines and checked all four wheels for leaks. The peddle feels the same. It will not pump up (air in the line) it just creeps down all the way to the floor until the break light come on. Let go of the peddle, it recovers and you can preform the malfunction again.
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Saturday, August 22nd, 2009 AT 4:36 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If it has an antilock brake did you bleed it before bleeding the wheels
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Thursday, August 27th, 2020 AT 6:31 PM
Tiny
DOUG_JANOWSKI
  • MEMBER
  • 3 POSTS
"If it has an antilock brake did you bleed it before bleeding the wheels"

Yes and yes to both. Do you know anything about a dump valve or bypass valve?
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Thursday, August 27th, 2020 AT 6:31 PM
Tiny
DOUG_JANOWSKI
  • MEMBER
  • 3 POSTS
Well Pros time foe a bit of skooling. On this trucks antilock pump, there are two cylinders with pop off valves. If the pins are pushed all the way out the yhe unit is no good causing the peddle to go all the way to the floor. I have my truck fixed and no money to the pros. Have a nice day.
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Thursday, August 27th, 2020 AT 6:31 PM

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