brakes act as if I am riding with my foot on the pedal

2004 GMC ENVOY
85,000 MILES
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EAGLE626
  • MEMBER
  • 2 POSTS
I have a 2004 Envoy, drive 25 miles to work. First five miles or so brakes are perfect. Then the brakes act as if i am riding with my foot on the pedal. Then about five or so miles before i get to work, they are fine again. Fluid levels are right, even pulled the ABS fuse still does it. Rairly ever does it on the way home of the evening. Local shops do not have a clue?
Aug 30, 2011 at 6:40 PM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
This happens when the brake booster push rod is adjusted out too far which does no allow the brake master to return fully holding the brakes on . To confirm the issue loosen the brake master mounting bolts 3 turns to see if the car starts to roll again, if so remove the master and adjust the booster push rod inward. Also a brake flex hose can come apart internally causing a short of check valve in the system but this is usually isolated to one brake either front or rear.
Aug 30, 2011 at 7:05 PM
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EAGLE626
  • MEMBER
  • 2 POSTS
I removed the master and could tell it was not returning all the way so i got a new one and the problem is gone thanks for the advice.
Sep 1, 2011 at 4:41 PM
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