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OK, my brakes suck. Why?

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Old 04-29-07, 11:52 AM
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OK, my brakes suck. Why?
Just changed rotors, pads, completely changed the fluid and bled them, and still the pedal feels spongy and the brakes feel like crap. I'm assuming it means the master cylinder is shot. What do you guys think?
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Old 04-29-07, 11:54 AM
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Check your lines and keep bleeding them could be your master cylinder but i dont think it is sounds like air in the lines to me.
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Old 04-29-07, 11:56 AM
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Originally Posted by turbo10th
Check your lines and keep bleeding them could be your master cylinder but i dont think it is sounds like air in the lines to me.
I went through 2 quarts of brake fluid doing the change, I'm 99.99999999999% positive there is no air in them.
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Old 04-29-07, 11:56 AM
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That sound s like a good guess to me. Have someone look into the master cyl reservior to see if there is turbulence when you push the pedal. That would be fluid squeezing back. If not, well bleed them again...
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Old 04-29-07, 11:59 AM
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That is odd yea could be your master cylinder then
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Old 04-29-07, 12:10 PM
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did you get all 6 bleed screws?
sorry had to ask.
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Old 04-29-07, 12:14 PM
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heh my brakes feel like that too.

They use to feel like that cause my ABS was hella leaking.
So i converted to non ABS with n/a parts but it still feels spongy.
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Old 04-29-07, 12:16 PM
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If you went thru that much fluid. it's probably a bad master.

Originally Posted by ajhehr
did you get all 6 bleed screws?
sorry had to ask.
You only ned to do the bottom 2 bleeders on the rear if you have removed/drained the caliper assembly.
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Old 04-29-07, 01:13 PM
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brake booster or master cylinder.
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Old 04-29-07, 01:18 PM
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Originally Posted by $100T2
I went through 2 quarts of brake fluid doing the change, I'm 99.99999999999% positive there is no air in them.
i had one like this too.

91 na; new master, front calipers, SS lines... pedal feel got WORSE, we put like a GALLON for fluid thru it too. never figured it out

new car is an 89 base, its been sitting for a long time, fluid is BLACK, pedal feel is great.

why?!?!
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Old 04-29-07, 01:26 PM
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check your abs pump the same thing happend to me and the dam thing was leaking.
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Old 04-29-07, 01:55 PM
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Originally Posted by alexdimen
If you went thru that much fluid. it's probably a bad master.
I went through that much fluid just to clear the old, nasty **** out. I think the fluid might have been original. It was that bad.
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Old 04-29-07, 02:37 PM
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maybe our rotors are just too worn out? Like my front rotors have a NICE lip on the edge where the pad doesnt make contact....

Is this a possibility?
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Old 04-29-07, 02:52 PM
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My rotors are brand new, that's definitely not the problem.
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Old 04-29-07, 04:58 PM
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what are you using for pads?

How old are the soft lines?
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Old 04-29-07, 05:41 PM
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hmm the rubber lines could be flexing if theyre worn.
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Old 04-30-07, 06:49 AM
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sounds like the master cylinder. i had a similar problem and found out mine was leaking fluid.
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Old 04-30-07, 12:29 PM
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brake booster vacuum check hose?
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