brake Light On ?

Maybe a stupid question here, but, are you sure you don't have a seized caliper or wheel cylinder. I've had this happen, no air was in the lines, blead them over and over to be 100% sure, the pedal feel was good also, but with the engine running, I could get that pedal to the floor.
Might be a little late now, hope you read this before you disconnect more lines, check your calipers and wheel cylinders.

All the best.