Bleed the brakes to eliminate the chance of air in them. A spongy brake is usually air in the system. However, I can tell you that on my Suburban (1999 with front disk rear drum) it started to feel spongy when the front pads got low. It might have been the semi metallic pads getting soft or something but I bleed the brakes and it didn't have any air in the system. I replaced the pads with some ceramic pads, adjusted the rears and the pedal is firm again and it stops great.
|