The brake pedal pedal on my car is hard as a rock and i have little breaking power. already tried to bleed the breaks and it did nothing.

You still have air in the system.(not bled properly) If you let the Master cylinder drop down to nothing then you need to bench bleed that before bleeding the lines again.

I would hope they lock up when you hit them hard!

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sounds like break caliber is sticking it will be on one side. it is not releasing. there will probably be brake dust on your wheel on the bad caliber
good luck

you definitely need to bleed the breaks

How to Bleed your Brakes by Yourself

Sound like you either have air in the system or a leak. Make sure all the connections are tight on the new calipers. clean off all the connections and blessed screws with brake cleaner. Then have your partner press on the brake pedal while you look for leaks. Reblead the entire system again starting at the right rear, than the left rear, than the right front, and finally the left front. Continue bleeding at each wheel until no air comes out. make sure you don,t let the master cylinder go dry. It will take several pedal pumps for the caliper pistons to take up the gap in between the pads and rotors. I assume you have a helper pushing on the brake pedal during the bedding process?

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To bleed the brakes you need someone to pump the brakes and someone to watch the air valve on the back of the brakes until the air is out of the line. Once the air valve on the back of the brake line starts to flow brake fluid clearly then the air will be out. Recap the air valve and you should be ok.

Power and manual have the same equivalent
Power is just easier to apply than manual
To BLEED brakes properly and this is the only way which will be correct is to start at the furthest point and work your way to the closest point upon completion. If not done this way air will be still in the lines

hello, your going to need a buddy in the truck pumping the brakes while you bleed them. With that first you need to verify that the master cylinder is full, if it is you can get started, there are two ways you can do this, the first is called a non-pressure bleed, this is when you break the bleeder loose and have your assistant push down on the brake pedal and when it is all the way to the floor you tighten the bleeder up before they release the break pedal. The second method is the pressure bleed. this one is a little bit more messy, you will have your assistant pump the brake pedal several times and hold firmly while you break the bleeder loose, the pressure will force the fluid and air out quickly. you will have to bleed both wheels untill there are no more bubbles in the fluid coming out. be sure to keep checking the master cylinder to verify that the brake fluid is full.

Two persons are required: one to bleed and other to press brake pedal.
Remove wheel and hub of the side you want to bleed. You will find the bleed nut there. Open it a little until some oil flows out. Ask the other person to press brake pedal with steady pushing and withdrawing until he feels its tight while you slowly tighten the nut. Adjust tightness of pedal by trial. Don't forge to refill the brake fluid after bleeding all the brakes.

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you need to hold in the metering valve.when you bleed the front brakes.long as the valve closed off you wont be able to bleed front brakes.better to get extra help.hard to bleed by your self .