Need help troubleshooting problem with brakes

Just a suggestion for the future:
When you need help with a problem on a car forum, you need to provide all the information regarding the problem.
The way you did it, there are several unknown issues that require members to ask you questions. This isn't the way to do it.
Don't make it hard for people to help you. To log on and ask a basic question like what is wrong with my brakes yet provide zero info about the brand of the parts, the type of parts or anything that might help....isn't going to help you.
No pictures either? Why?
If you're going to be stingy with information, at least provide pictures so that maybe someone can tell what you have.
This entire forum is made up of voluntary members. Nobody is paid to answer questions.
Nobody here knows your car so we are all in the dark until you provide info.
I read nothing about the type or brand of master cylinder, you hinted at it being a power system but didn't clearly state it. No mention of the type of rotors, calipers, brake hoses, whether it has a proportioning valve or not or even the brake pads.
Maybe you don't know the details. If that is the case, state it up front but tell as much as you know so others can help.
There are numerous great people on the site that will chime in to help. You have to make it easy for them to do so or people will scroll on by this topic and you'll never get the help you need.