I lost all brakes - A weird brake issue

I lost all brakes - what went wrong - help.



A weird brake issue – any help would be greatly appreciated


Vehicle is a 1987 Toyota 4X4 Pickup, 22RE 2.4 liter 4 cylinder, EFI.

Truck was fine until a rear brake line rusted through and pissed out all the fluid.

I changed the lines (might as well do all in the back). I bled the system since the fluid reservoir went empty.
All the air can out and good pressure of fluid while bleeding. - The problem is we cannot get pressure at the brake pedal.
No pressure while bleeding at all - the pedal goes all the way to the floor.

I than bled the master cylinder, and check for a possible crossed line at the proportioning valve in back.
I switched two line in the proportioning valve, in case I screwed it before anyway.
I bled all wheels again with the engine off, and than with the engine on for the power assist.
No difference - No changes - Brake pedal still going to the floor.

I gave up after attempting to bleed the entire system a total of 4 times.
I's quite obvious that I can continue to bleed to the year 2010, without any improvement.

I know I'm bleeding right since I've owned and service dozen of cars & trucks over the years.
I'm a pretty good backyard mechanic, but I an now totally dumbfounded and clueless.

Remember guys - everything worked perfect before that brake line burst.
Help. Please. - Any ideal would be greatly appreciated.


Thanks in advanced.