soft brake pedal

[dheavychevy38]

On my 87 k5 I have put all new brakes on it adjusted the rears to where the wheel's have slight drag on them. I ran 1 gallon of brake fluid through them bleeding them and i have no leaks. After all that my brake pedal goes almost to the floor and is very soft and the front brakes seem to work more than the rear. Any Ideas ? I have read a ton of posts but nothing is seeming to help. The brakes are stock 10 bolts nothing fancy. Thanks in advance Denny

 

[k30bb468]

Sounds like the master cylinder is bad to me .
How was the pedal before the new brakes ??

 

[87blazerproject]

same happend on my budies 88 blazer
it was the master cylinder
when it goes bad it prevents full preasure from being applied
your front brakes do the majority of the braking on all front engine vehicles so thats why you feel them more

they sell rebuild kits but somtimes replacements are only a few bucks more
hope it helps