Just recently bought this beater truck. With all the various parts
I've bought, I'm approaching what I paid for the truck! In any case
here's my problem.
Replaced one of the rear brake hard lines due to a leak. Bled the rear
lines. All seemed ok for a couple short trips. Then pedal suddenly went
almost to the floor with little stopping power. Thought I had another
leak or air in the system. Bled the rear again, attempted to bleed the
front...bleeder valves rusted shut, so I replaced the calipers (good
thing too since the pads were pretty bad). Bled all four wheels and
test drove truck. Brakes worked GREAT!
Next couple trips all well. Latest trip the brake pedal would work
great with little travel same as the previous trips after new the
calipers, but occasionally would travel nearly to the floor with poor
stopping power. It seemed to do this more often if I would lightly
apply the brakes, then let up on the pedel, then reapply. Does this
sound like there is still air in the system or an intermittently
failing master cylinder? Being an intermittent problem has me wondering
since it doesn't seem like a "normal" problem.