RepairPal Certified shops can diagnose and repair your 1994 Plymouth Acclaim. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Rmove lines from master cylinder and install plugs then test for pressure(may need to bleed a little first) IF still no pressure , then the master cylinder IS defective , or was not properly bench bled.--That may be a starting point.