2003 escort zx2, new pads,rotors in front, new shoes and drums in rear, new master cylinder, when car isnt running i have a nice pedal, but when the car is running the pedal is very low.. have bled the system many times and have not found any leaks..?
by 
raymonmoor
ANSWERS: 2
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you have a better peddle when its not running because its not being assisted by the booster. its probably one of two things did you bench bleed the master cyl. and bleed the brakes starting with the pass. rear, then driver, then pass front, then driver front. if yes then are the rear shoes adjusted right. if there is to much slack then the peddle will drop alot. start with checking the rear shoes first then worry about bleeding unless you didnt bench bleed the master.
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You may need to adjust the rear brakes. If they are not correct you will get long pedal travel.
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