Did as you suggested, no luck. In fact now they have zero resistance and I can't build up any pressure.
Did you replace all the washers in your banjos, they are one use only. Are all of your banjo bolts correctly torqued, and your bleed screw in good condition? O2 molecules are sneaky!
So, now it's time to disconnect the brake line from the m/c (master cylinder) and the caliper. Drain it first!
-Push the brake pistons back as far as you can. I use a "C" clamp and the pads.
***DO NOT LET THE M/C BECOME LOW ANYTIME DURING THIS PROCEDURE***
-Bench prime the m/c.
-Attach the top of the brake line, with new washers, torqued properly, to the m/c.
-Place the caliper end of the hose in a catch can for the brake fluid you're going to lose.
-Pour brake fluid into the m/c until you have a continuous stream.
-Finger and thumb over banjo holes, top off the m/c.
-Pull in the brake lever slowly. If you feel fluid pressure on your finger/thumb, and you should...great. If not buy another gallon of brake fluid and repeat.
-Attach your brake line to the caliper, with new washers!
-Snug the banjo bolt very lightly.
-Wet rags and H20 spray bottle on hand, pull in the brake lever slowly. You should have bubbles and brake fluid leaking around the banjo bolt and "new washers". If not loosen a smidge.
-Hold brake lever tightly to the handle and tighten the banjo bolt.
-Let go of the brake lever.
-Open the caliper bleed screw totally.
-Start putting brake fluid into the m/c until it flows out of the caliper bleed screw.
-When you have a nice flow of fluid from the bleed screw, close it.
-Now..you may start "bleeding" the brakes.
Hoping this will get you going...and stopping!