so i have been looking up but i cannot find the answer,

i have a 1988 4runner 22re.

i upgraded the booster and master from a 95 4runner for the dual diaphram booster and 1" in master.

*** the problem, so driving around normal pedal is fine, about 1-1.5 travel and brakes feel ok, then anything after that the pedal is WAY to hard to push, so i needed to stop quick it wouldnt no matter how hard i pressed.

while upgrading the booster, i seen that with the rodat the pedal the same height for some reason the pedal was off the switch, which caused my brake lights to stay on so i just adjusted the brake switch.


****ANY HELP WOULD BE GREAT******

 

Sounds like the Rod that engages the Master Cylinder is not adjusted correct.

New Booster has problems This was New Out of the Box ??

 

it was a new reman, but i think i figured out the issue, im goign to return the booster and get another, it seems and one part of the booster isnt working like since its a dual booster. thats all i can figure out. the rod is measured correctly, i used a rod depth gauge.