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soft brakes?

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Old Mar 13, 2010 | 11:27 AM
  #1  
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blacktop06
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soft brakes?

i have a 03 f150 crew with all disk brakes. i have replaced the master cylider but the brakes are still soft. i take me to stand on them to get it to stop sometimes than other times they fell fine. i sure i bleed them all the way out but not sure what else it could be. thanks for any help i get on this.
 
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Old Mar 13, 2010 | 01:22 PM
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Could be a weak brake caliper piston or stretched brake hoses. Weak vacuum at brake booster, or leaking hose there.
 
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Old Mar 13, 2010 | 02:25 PM
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wow were would i start.
 
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Old Mar 14, 2010 | 01:52 AM
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start witht he easier ones first, like the vaacum at the booster. then work your way too the calipers.
 
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Old Mar 14, 2010 | 06:43 AM
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I believe that if you open the system upstream of the anti-lock module, you need to pressure bleed the system. I don't think the old brake pump method will work.
 
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Old Mar 14, 2010 | 11:17 PM
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ok how would i pressure bleed the brakes? sounds like a good place to start.
 
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Old Mar 15, 2010 | 02:25 AM
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bring it somewhere they have a brake bleeding machine. Most Ford dealerships do, but its a little steep in the wallet. or see if you can rent one, and buy a sixer for a buddy to come help you figure it out.....
 
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