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

Tiny
EAGLE626
  • MEMBER
  • 2004 GMC ENVOY
  • 85,000 MILES
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?
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Tuesday, August 30th, 2011 AT 6:40 PM

2 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
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.
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Tuesday, August 30th, 2011 AT 7:05 PM
Tiny
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.
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Thursday, September 1st, 2011 AT 4:41 PM

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