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Discussion Starter · #1 ·
I'm a bit stumped on this and hoping someone here might have a good answer. I posted on FiestaFaction last week but I've found that forum to be pretty dead and useless.

My 2013 Fiesta with 135,000 miles is having a weird issue with the right rear brake hanging up (at least I think it's only the right rear).

Recently I could feel a brake hanging/sticking after applying the brakes and the pedal seems to feel very firm when it happens. The problem occurs very randomly, and a quick spike of the brake pedal usually releases it. I couldn't feel the car pulling right or left when it would happen so I assumed it was a rear brake. After a few dozen back and forths in the driveway I finally felt it hang up, so I jacked up the rear of the car and discovered the right rear wheel was the one stuck.

It's not related the parking brake because it does it randomly after applying the brakes while driving.

The most obvious thing to check was the wheel cylinder, which was a little sticky, so I installed a new wheel cylinder but the problem is still there. Drum brakes are pretty simple and everything else looked fine so I'm not too sure what else to load into the parts cannon to solve this.

A question - the car is a manual shift so it has this feature called Hill Start Assist which basically holds the brake on when you're starting on an incline. I can't disable this feature through the menu system in the car (though it seems like later models can) but maybe I can with ForScan for troubleshooting purposes. I've wondered if this could be malfunctioning and causing the problem, but I'm not sure what brakes it affects. I have to try to do more research on this feature.

I appreciate any ideas/feedback!
 

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1999 3.0 SilFro
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I would suspect the soft line on that corner. Similar thing happened on the right front of my red 99, and a new soft line fixed it for me. The insides of the hose get squishy and impede the fluid flow - especially OUT of the brake, since it's not being forced by the pedal in that direction.
 

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1999 3.0 SilFro
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Yeah, I think there has to be a soft line in there somewhere to allow the suspension to move.
 

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I would suspect the soft line on that corner. Similar thing happened on the right front of my red 99, and a new soft line fixed it for me. The insides of the hose get squishy and impede the fluid flow - especially OUT of the brake, since it's not being forced by the pedal in that direction.
I've seen exactly this far too many times. #17 in this Ford diagram is a rubber hose:
Organism Font Circle Auto part Drawing
 

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Discussion Starter · #6 ·
Ah thanks, RALYCAT. I haven't had time to look again yet but I'll get a pair ordered and get them replaced. Hopefully that fixes it. I've actually never had this happen before.

Appreciate it, gentleman!
 
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