Brake pedal goes to floor. Bled brakes several times. No leaks.
I have a '98 F150 with 4WD & rear-ABS. I replaced the front calipers/brackets, pads & rotors. I had a friend help me bleed the brakes and while we were doing so the brake-line in the center of the truck blew. I replaced the line from the ABS (under the master cylinder) to the rear brake hose. Once everything was connected we attempted to bleed the brakes again. When I started the truck up the pedal went straight to the floor with no resistance. We went through two bottles of fluid bleeding the brakes again and again and there are no leaks, pedal just goes straight to the floor. Any thoughts?
Bench-bleed the old master cylinder?
Replace the mater cylinder (and bench-bleed the new one)?
Thank you to anyone who may be able to offer advice.