The reason that you bench bleed a cylinder is to get all the air (as in bubbles) out of it. Bench bleed it again, and keep pumping it untill there are no bubbles. You can do this right on the car by disconnecting the brake lines, taking the cap off, and make up a set of short lines that go from the ports on the master cylinder and curve back over the top so that they squirt back into the master cylinder. Fill it with fluid, and keep pumping untill there are no bubbles coming out of the lines nor up from inside the cylinder. Then disconnect the dummy lines (don't worry, the fluid in the cylinder won't run out when you do this) Then hook up your regular brake lines and bleed the passenger rear wheel first, then the drivers side rear wheel, then the passenger front brake, then the drivers side front brake. NOTE while you are bench bleeding the cylinder, wear safety goggles so it doesn't squirt in your eye---really bad stuff if that happens.