So,.. I rebuilt my caliper and bled the brakes, bubbles came out in the beginning now it slowly drizzles, the brakes feel like they still have air in them, what would cause the piston to not move at all? Air in the system???

 

then you didnt do it right

 

well i figured that but.. how much is there to go wrong

 

sounds like your master cilinder needs to replaced

 

I'd bleed the brakes again. Do all four corners just to be sure, starting with the right rear. (left rear for RHD)

 

I have heard when you completely drain the brake fluid, you need to "bench bleed" the Master Cylinder. To be honest, I don't know what that entails exactly, but if you are completely out of ideas it might be something to research? Sorry I can't be more help, I hate giving you an "I've heard" post, just trying to be helpful.

 

it is very unlikly that your caliper is stuck. most likely you have air in your system. first bleed all the brakes again, 2 or 3 times if air is still coming out. if your pedal is still crappy you ned to bleed the master cylinder. when you install a new master you do need to bench bleed the master, but you dont realy have to its just easyer on the bench in a vice and you dont get brake fluid all ovet the engine bay.
so this is what you need to do. there are three lines going into the master and one at a time you need to crack the lines and bleed the air out of the master. i would do the each line 3 times of as long as bubbles come out. do not remove the lines just loosen them a 1/2 or a 1/4 turn. then bleed the brakes again
keep in mind that if the master cyl resivoure never went dry during your brake bleeding/rebuilding then you should not have to bleed the master

 

Explain how you bled the brakes. Drizzles doesn't compute. You may want to get a set of SpeedBleeders (www.summitracing.com)which will make the bleeding process much simpler.

 

in the future, when you remove a caliper clamp the rubber line up to the chassis, this will prevent the system from bleeding free of fluid and filling with air. now you will likely need to rebuild the master due to all the crap in the bottom of the master running through the master itself and all the bleeding you will need to continue with to get all the air out of the system.