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Most likely that you still have air in the lines. Make sure the brake pedal is held down until the bleed screw is tightened back up between pumping and bleeding cycles, otherwise air will be sucked back into the system.

pump brake pedal until there is pressure

hold pressure on pedal

loosen bleed screw ( air or fluid should come out and pedal should go to floor )

hold pedal to floor

tighten screw

pump pedal again

repeat this for all 4 wheels and until only clean fluid comes out.

The pedal should get better as you work through all the wheels.

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Q: Why does your brake still go straight to floor you have changed master cylinder power booster and bleed the brakes many times?
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The brake booster is what gives you power brakes. In the engine compartment in front of the steering wheel is a round black flat ball looking thing. That's the brake booster with the brake master cylinder attached in front of it. The brake booster uses VACCUM from the engine to multiply the force that your foot applies to the master cylinder. Used with power brake applications

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If the pedal feels soft and spongy, you have air trapped in your brake lines. Did you prime the master cylinder before you installed it? Air in the brake line will not let the fluid fully compress. With all that you changed out, your brakes shoudl feel like new. Read up on how to bleed brakes or take it to a pro.......but don't continue to drive it the way it is.

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