Strange braking issue

[jkichline]

This is a weird one. When I pull out from a light, I can feel the rear brakes dragging. Once I drive for about 100 feet or more, it seems to go away. I thought I might have had a sticky E brake line but it seems to be intermittant without touching the e brake in between. Also, I PB blasted both brake cables and nothing changed. The e brake spring tension on the calipers seems to be good but I don't know how to tell for sure. With it being intermittant, its tough to determine. I replaced the rear brakes and rotors recently and bled the lines without any problems. It seems almost as if the fluid isn't getting sucked back into the master cylinder correctly.

 

[NJSHO]

Sticky caliper slider pins. Remove caliper, clean pin and hole, regrease with caliper pin grease, replace slider boots if necessary, and reassemble. If that's not the problem, you might have collapsed rear lines. Do you still have the rubber lines?

 

[93rev2sev]

Most likely a clogged flex line.

The debris gets caught where the bracket for the hose is crimped around the hose (my debris looked like a chunk of rust).

Bleed your brakes completely, air in the hose or caliper starts the debris making process through corrosion

When you brake, it (the debris) moves toward the caliper providing flow(and stopping power). When the caliper rebounds the debris get stuck - clogging the line where it is crimped.

Been there, done that...eventually it gets bad enough that the caliper locks onto the rotor. The heat it makes is enough to worry about burning your car to the ground. The next time you get out of your car after a bit of stop and go driving, spit on the rim...if it boils you got problems.

 

[Dave Kegel]

As others have said, assuming the slider pins are fine, it's the brake hoses. You'll have to replace them and re-bleed the rear brakes.

Dave