Let me introduce myself. My name is Shannon and I've been a lurker here for a few years.
I have recently upgraded my front calipers to BMW320i variety.
I have recently upgraded my brake lines to stainless braid variety.
I have recently replaced all four rotors and brake pads.
and yes, I had someone else install a 19mm master cylinder.
Here is my problem... I have followed the tech articles on here for everything that applied to this job from replacing the pads to bleeding the brakes. But I have NEVER been able to get the darn thing to be anything but spongy...and by spongy I mean I can push the pedal all the way to the floor if I push hard enough. Also the brakes drag on all four wheels. It's like they will clamp down when you press the pedal but they don't release all the way. On the rear brakes I've adjusted the venting clearance about a million times. On the front brakes there is no adjustment so they just drag all the time.
Any suggestions??? I'm at the end of my rope on this. Could it be the brand new 19mm master cylinder? What am I doing wrong? Oh yeah I just recently purchased the pressure bleeder that is sold here. (makes the job way easier) but didn't help a bit with my problem.