Spongy brakes changed master cylinder, new brakes, rotors and calipers and wheel cylinders and still have spongy brakes. Bled at least 6 times, still spongy. Rechecked all fittings. Original problem was a driver side caliper was sticking and with no brake pad left and the rotor was bad. Passenger side also had uneven wear on the pads. Consiquently changed everything on both sides. The only thing not done is the brake booster. Any other suggestions.

Probably still have air in the lines. You may want to purchase one of the one-man pressure bleeder outfits. How they work is to force fluid into the bleed valves, thus filling the calipers or wheel cylinders, then pushing the air on up the line to the master cylinder, where the air has a chance to escape-out the top of the master cylinder.

Have you driven it since the brakes where replaced?

Did you bleed all four wheels?

have you "broken in" the new pads?

Are the rears drum or disk? If drum are they adjusted correctly?

are you using remanufactured master cylinders? If so keep replacing them. eventually you will get one that works. New is pricey but a better way to go.

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If the car has Drum style rear brakes, make sure the adjustment is good. It takes a lot of fluid to activate them.
PS. I assume you did bleed the rears.

pull the rear brake drums off and see which wheel cylinder is leaking.

the big brain

Check rear wheel cylinders for leaks. Did you bench bleed the master cylinder?

Yes master cylinder and maybe ABS sending unit. Also is there a sound of an air leak it may also be your brake booster

try disconnecting the front line, have someone else then step on the brake pedal and hold it down while you re-install the line. If that doesn't do it, you probably did get a defective master cylinder.

Spongy means air present in the hydraulic system,I recommend check and recheck all of the brake system areas where air could enter(master cylinder,fittings,calipers,etc.)and bleed the entire system again.
Good luck !

Did you adjust the rear shoes out? If the rear drum brakes are out of adjustment they will give you a lot of pedal travel. If the pads are worn have no fear of that U-CLIP brake spring, just change one shoe at a time. Take the spring off one side, change the shoe, put the spring back on the post and do the same to the other shoe, no problem.

I just went to Brake Masters this morning and had them replace the Master Cylinder since I was experiencing the pedal very spongy and going to the floor. When they replaced the Master Cylinder and they gave me back the car, the brakes were still spongy and going to the floor. I addressed this to them and they took another look at it, but when I took it for a second time, the brakes were extremely spongy. It was almost like they gave me back my car in worst condition to when I brought it in. Can you help?