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You didn't bleed the lines correctly. Open the brake fluid rez and keep it topped off properly while you perform this. Loosen bleeder valve and have someone push on the brakes. Quickly tighten the bleeder valve after you get some fluid coming out of the valve. As long as the fluid comes out smoothly without spitting out of the valve that brake set is fine. Tighten the valve and go to the next one and try that. Repeat as needed to make sure the fluid doesn't have air on the lines or you'll have very soft braking power. Now all the brakes should be fine and have adequate fluid pressure. Now test the brakes very gently by backing up and going forward a few times in the driveway or parking lot. Use the e-brake and release it a couple of times. Back up and go forward and notice the brakes grabbing. Now you can check it out on the road. Go slow and don't slam the brakes or you'll glaze the pad's surfaces and ruin your new brake pads. After the first 50 to 100 miles you can get a bit harder (back to normal) with the breaking.

Hope this helps.

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โˆ™ 2008-02-06 09:55:47
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Q: After replacing front and back brakes and putting on new cylinders; What would cause them to not work properly?
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