Vehicle: 2007 Toyota Tacoma 4WD v6 6 speed
I installed a new master cylinder (the truck is at about 120K mi) but when I reconnected all the plumbing, it seems like it is not filling with fluid. The pedal seems two have two extreme states of being depressed and being released, meaning nothing in between, kind of like a power switch, it is on or off. When depressed, the pedal just stays in, does not go back. I did refill the brake fluid (which also feeds the clutch system) after reconnecting all the lines and hoses.
What could be the cause of this? Could there be a plug inside the cylinder fluid intake valve (kind of like it was inside the line out valve, I assume to prevent dust from coming in) that I should have taken out before installation?