You do not need a pressure bleeder if you are using the brake pedal method since the brake pedal actuating the master cylinder will produce far in excess of the 13 psi from the pressure bleeder. If you have loosened the bleeder valve at a wheel cylinder and still do not get a strong steady flow when depressing the brake pedal there are one or more obstructions in the system or the master cylinder is not supplying enough pressure. Start by replacing the flexible brake hoses.

P.S. Now i feel like a complete idiot for having wasted my time responding to this thread before I scrolled down the page to see that the OP had previously begun another thread on the same subject and had received sage advice on solving his problem. Duplicate threads are neither helpful or desired.