Brakes still dont work.

[randomTruckKid]

If you’re able to fully depress the brakes that many times with the engine off, the master cyl is still going to the floor.
Noise is the booster I think.

This one dosnt go to the floor like the other one. It gets most of the way there then gets super stiff and I have to push super had and it slowly goes down.

Did you replace the booster?

If so, did you adjust the set screw on the booster shaft? if it's not set correctly it won't engage the MC at the right time. I've made this mistake a few times.

Don't think do?