Ford Repair Questions? Ask a Mechanic for Answers ASAP
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Did you re-bleed at the wheels after the master cylinder replacement?
If you use line clamps and clamp off the rubber hoses to the rear then front brakes, does one axle or one wheel fix the pedal issue indicating a concern at that wheel with a binding caliper or pad, or rear brakes adjusted incorrect?
It would not be the RABS, though to verify all air is out of the system, run it on a rack in gear and apply the brakes to activate the RABS then re-bleed the rear brakes to force the air trapped in the RABS out.
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