Brake pedal goes to floor after master cylinder and booster replaced

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. Make sure the antilock brake system is bled. The master cylinder itself must also be specifically bled. Bleeding air out is the only thing there is, unless you have a faulty master cylinder. Try, try again. Or seek guidance from a local shop near you. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.