[YOTAJUNKY]

Hey, my 86 s10 4x4 brakes give out almost completly while driving just for an instance, then after letting off the pedal I have brakes agian. brakes are less than year old and I replaced the master cylinder thinking it would solve this problem, my brake have not failed me since the new master cylinder, but the pedal feels soft like normal for the first half of pedal travel with good braking, going past half way on the pedal travel it gets very firm and braking seems to fade a little. mostly the pedal feel to hard to push after half stroke. please help.

 

[bronco75]

its a common problem on these you are running out of vac in the power booster. check your check valve at booster and make sure its not partly blocked or leaking
I have never gotten mine to be 100% satisfactory but they are better. the other problem I have ran into is the rear shoes seem to varnish real easy and reduce braking so I clean and sand them about 1 time a year