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low pedal

1990 buick century. I have replaced the master cylinder and rebuilt the calipers in front and 1 new wheel cylinder(due to leak) and still have a low brake pedal. Feels like I bottom the pedal to stop quickly. I am fairly confident all the air is out. rear shoes feel adjusted properly although their must be a slight out of round on the drum since it catches at some points when spinning. Any suggestions on where to look would be appreciated. The total pedal travel is about 2.1" to firm pedal, slightly further and I feel like the master bottoms? total pedal travel to floor is 4"+
Reply to
toddtech
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Brake hose ?

Reply to
Rick

calipers in front and 1 new wheel cylinder(due to leak) and still have a low brake pedal. Feels like I bottom the pedal to stop quickly. I am fairly confident all the air is out. rear shoes feel adjusted properly although their must be a slight out of round on the drum since it catches at some points when spinning. Any suggestions on where to look would be appreciated. The total pedal travel is about 2.1" to firm pedal, slightly further and I feel like the master bottoms? total pedal travel to floor is 4"+

Perhaps the rotors and rear housing are worn down?

Reply to
CL (dnoyeB) Gilbert

calipers in front and 1 new wheel cylinder(due to leak) and still have a low brake pedal. Feels like I bottom the pedal to stop quickly. I am fairly confident all the air is out. rear shoes feel adjusted properly although their must be a slight out of round on the drum since it catches at some points when spinning. Any suggestions on where to look would be appreciated. The total pedal travel is about 2.1" to firm pedal, slightly further and I feel like the master bottoms? total pedal travel to floor is 4"+

Sure sounds like air in the system. Try a vac bleeder. Why not replace the one old rear wheel cylinder while you are at it?

Reply to
=?x-user-defined?Q?=AB?= Paul

calipers in front and 1 new wheel cylinder(due to leak) and still have a low brake pedal. Feels like I bottom the pedal to stop quickly. I am fairly confident all the air is out. rear shoes feel adjusted properly although their must be a slight out of round on the drum since it catches at some points when spinning. Any suggestions on where to look would be appreciated. The total pedal travel is about 2.1" to firm pedal, slightly further and I feel like the master bottoms? total pedal travel to floor is 4"+

That would not affect pedal travel if the rears were properly adjusted.

Reply to
=?x-user-defined?Q?=AB?= Paul

Did you bench bleed the new mc?

Reply to
Michael Keefe

calipers in front and 1 new wheel cylinder(due to leak) and still have a low brake pedal. Feels like I bottom the pedal to stop quickly. I am fairly confident all the air is out. rear shoes feel adjusted properly although their must be a slight out of round on the drum since it catches at some points when spinning. Any suggestions on where to look would be appreciated. The total pedal travel is about 2.1" to firm pedal, slightly further and I feel like the master bottoms? total pedal travel to floor is 4"+

Does this vehicle have ABS and did you bleed the ABS with the proper procedure? (requires scan tool)

good luck

nate

Reply to
N8N

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