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2009 Ford Wscape 2.5L I4
The brakes will only begin to stop the vehicle about half the way down. With the vehicle off the brakes will build pressure but leak down when being pressed. This issue has occurred before but went away after a couple of hours. Brake pads do not need to replaced (per Ford). There aren’t any ABS lights on. The fluid level isn’t low nor does the system appear to be leaking.
The Internet suggests that it may be the master cylinder or the hydraulic control unit. Some reports stated that the master was replaced but did not resolve the issue and that upon replacing the hydraulic control unit the issue was resolved.
Is there a way that I can narrow it down before throwing a part at it?
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I pulled this procedure off one of the service information programs that i have. not sure if i should say the name but this procedure is kinda complicated in my opinion. I would say if you cant determine which is the culprit the cheapest route to go if you do it yourself would be to put a master cylinder on it. That HCU will cost a pretty penny.
1. Block off rear brake hoses, if the pedal no longer goes to the floor, suspect rear calipers, wheel cylinders, rotor or pad concerns.2. If the pedal still goes to the floor, block off the front calipers, if the pedal no longer goes to the floor, suspect front calipers, rotor or pad concern.
3. If the pedal still goes to the floor, remove and block off the hydraulic control unit. If the pedal no longer goes to the floor, perform electronic ABS bleed procedure, if this does not resolve, suspect hydraulic control unit faults.(complicated have to find a way to block hose while it is disconnected from unit and will hold pressure)
4. If blocking off the hydraulic control unit does not resolve concern, block off the master cylinder, if the pedal still goes to the floor, perform bleed on the master cylinder, if the concern is still present, suspect the master cylinder.
[quote=”ArmedsouthernEr” post=154130]I pulled this procedure off one of the service information programs that i have. not sure if i should say the name but this procedure is kinda complicated in my opinion. I would say if you cant determine which is the culprit the cheapest route to go if you do it yourself would be to put a master cylinder on it. That HCU will cost a pretty penny.
1. Block off rear brake hoses, if the pedal no longer goes to the floor, suspect rear calipers, wheel cylinders, rotor or pad concerns.2. If the pedal still goes to the floor, block off the front calipers, if the pedal no longer goes to the floor, suspect front calipers, rotor or pad concern.
3. If the pedal still goes to the floor, remove and block off the hydraulic control unit. If the pedal no longer goes to the floor, perform electronic ABS bleed procedure, if this does not resolve, suspect hydraulic control unit faults.(complicated have to find a way to block hose while it is disconnected from unit and will hold pressure)
4. If blocking off the hydraulic control unit does not resolve concern, block off the master cylinder, if the pedal still goes to the floor, perform bleed on the master cylinder, if the concern is still present, suspect the master cylinder.[/quote]
Thanks for the troubleshooting steps. I have heard that the HCU is expensive and appears that it may be only available from Ford. I would think that I might have some luck in a junk yard but I’ll have to cross that bridge when I get there.
No problem. Also just so you are aware the top fix from technicians who posted within the service information was the HCU or the abs bleed procedure but i wouldn’t see any reason why you should have air in the system unless you have done some major brake work which you didn’t mention so i assume not. Let me know what happens.
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