Soft brake pedal
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Junior User
Joined: Jul 2009
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Soft brake pedal
So Im goin along, put on the brakes and It stops. But when on the brakes it gets soft. But if you pump them once they get hard again. But with the pedal down the brake pressure light comes on. But when you idle up it turns off. I put on front pads, and nothing changed. It has new shoes as of 3 months ago. Im not loosing fluid. What is my problem.....hey hey be nice Im talkin about my truck not me personally.
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
So Im goin along, put on the brakes and It stops. But when on the brakes it gets soft. But if you pump them once they get hard again. But with the pedal down the brake pressure light comes on. But when you idle up it turns off. I put on front pads, and nothing changed. It has new shoes as of 3 months ago. Im not loosing fluid. What is my problem.....hey hey be nice Im talkin about my truck not me personally.
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Junior User
Joined: Jul 2009
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Whal else do you think?
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
What about the air in the lines, did you purged it.
Senior User
Joined: Aug 2008
Posts: 414
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From: Lady Lake FL
If I recall correctly when I was changing my brakefluid (yes someone does that) I ran into the same thing. If I remember correctly the proportioning valve got off center and had to bleed in certain sequence. Sorry can't remember sequence. It could also be you master cylinder, but since it started after replacing pads I would say the valve is off center. Or I may be a little off center.
Good Luck,
Paul
Good Luck,
Paul
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Thread Starter
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Junior User
Joined: Jul 2009
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If I recall correctly when I was changing my brakefluid (yes someone does that) I ran into the same thing. If I remember correctly the proportioning valve got off center and had to bleed in certain sequence. Sorry can't remember sequence. It could also be you master cylinder, but since it started after replacing pads I would say the valve is off center. Or I may be a little off center.
Good Luck,
Paul
Good Luck,
Paul
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Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
I dont know of any sequence. i get some to pump them 4or5 times and hold them down then undo the bleeder screw let the pedal go to the floor and hold close bleeder screw and repeat 3 times on each wheel checking fluid after each wheel
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
Ideally you should bleed the farest valve first then to the closest one, including the proportional valve in the sequence and totally agree with checking the brake fluid after each bleeding valve.
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
Thanks i didn't know that. how do you bleed the proportional vavle.
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
It has the same kind of bleeder as the one on the wheels. Here is a pic with the bleeder (arrow)