ok so a few of you know i was just having some brake problems and i couldnt get my brakes to hold pressure, any ways I though I had fixed the problem and I was wrong, they lost pressure after about an hour. So I cleaned everything with brake cleaner to watch for leaks and nothing. So im thinking MC or the MC kit? any opinions or ideas thanks.

 

First thing to do is remove the hardlines and the master cylinder...check if it's been leaking into the brake booster.
If not, you have several options.
-Rebuild the MC- my least favorite option but probably the cheapest.
-Buy a reman master cylinder- the quickest/easiest option.
-Take this opportunity to upgrade your booster/MC combo. Since you just swapped from single to four piston calipers, you may as well finish the job and get matching- or better- hydraulics to activate them.
This is the path I've been exploring for the past two months.

 

right on I will go check that out right now, how will i know if its leaking into the booster?