BLEEDING BRAKES with a PROPORTIONING VALVE

First you need to bench bleed the master before putting it into the car or you will never get your brakes bled. Then yes open the valve wide open. Start with pass rear first then drivers rear then the fronts.

Bled the master cylinder on the bench, aft chamber for front disc brakes bled out just fine, having trouble with the rear drums, I will open the proportioner valve full open... Thanks