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.
Problem with Fiesta rear brake hanging up
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!
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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I never thought of that....but I don't recall seeing a soft line there? I'll take a look this afternoon. Thanks Andy!
Yeah, I think there has to be a soft line in there somewhere to allow the suspension to move.
I've seen exactly this far too many times. #17 in this Ford diagram is a rubber hose: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.
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!
Appreciate it, gentleman!
Also check if it had a residual check valve. Not sure of the newer stuff had them or not but could be an issue.
-Also I've had rusty drum hardware be sticky.
-The shoe adjuster screw being too tight causing stickiness.
-just bad brake shoes or drums doing that too
-Also I've had rusty drum hardware be sticky.
-The shoe adjuster screw being too tight causing stickiness.
-just bad brake shoes or drums doing that too
Ok so updates:
I ordered a pair of rear brake hoses from Rock Auto (fastest I could get them). Snapped one while installing it and the second one leaked, so I swapped the original back in and sent those back. Ordered a pair from Ford and finally got those installed last night, but the problem is still there.
Is the residual check valve you're talking about the proportioning valve like Cougars/Contours have?
A member of the FiestaFaction forum replied to my thread after having a similar problem on his ST. In his case multiple brakes were dragging and there was no way to release it. His issue was a fault ABS controller.
With this happening so sporadically I'm not sure what to do to try to pinpoint the issue, or what parts to throw at it next.
I ordered a pair of rear brake hoses from Rock Auto (fastest I could get them). Snapped one while installing it and the second one leaked, so I swapped the original back in and sent those back. Ordered a pair from Ford and finally got those installed last night, but the problem is still there.
Is the residual check valve you're talking about the proportioning valve like Cougars/Contours have?
A member of the FiestaFaction forum replied to my thread after having a similar problem on his ST. In his case multiple brakes were dragging and there was no way to release it. His issue was a fault ABS controller.
With this happening so sporadically I'm not sure what to do to try to pinpoint the issue, or what parts to throw at it next.
Ugh, that's the worst.
Could there be perhaps a pinched steel line somewhere to the affected corner? Pedal pushes the fluid through but it can't release the pressure?
ABS controller makes sense, too - although you would think that should affect more than one brake, but who knows.
I guess if it was me, I would trace the steel line from back to front and verify that it's all 100%, for starters. And then I'd start pricing ABS controllers.
Could there be perhaps a pinched steel line somewhere to the affected corner? Pedal pushes the fluid through but it can't release the pressure?
ABS controller makes sense, too - although you would think that should affect more than one brake, but who knows.
I guess if it was me, I would trace the steel line from back to front and verify that it's all 100%, for starters. And then I'd start pricing ABS controllers.
When did you last flush the system? Could there be some debris in the line that is acting like a flap so it's braking fine, but clogging up when it backflows.
I've noticed some grey debris in my wife's '14 Focus brake reservoir so it needs one.
I've noticed some grey debris in my wife's '14 Focus brake reservoir so it needs one.
Residual check valve is a check valve used on drum brakes to keep a little bit of pressure in the wheel cylinder
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