why are both of my front brake calipers not working?

2001 LINCOLN NAVIGATOR
102,000 MILES
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VAL214
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  • 2 POSTS
Both of the front brake calipers are not instantly responding. at times the brakes stay in the braking position then slowly release.
Feb 4, 2012 at 1:01 AM
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JACOBANDNICKOLAS
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  • 110,190 POSTS
Check the master cylinder, check the proportioning valve...
Feb 4, 2012 at 1:17 AM
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VAL214
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  • 2 POSTS
where are those two located?
Feb 5, 2012 at 4:48 PM
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JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
The MC is on the driver's side under the hood on the firewall. The proportioning valve is below it.
Feb 5, 2012 at 8:06 PM