m>I have a 2000 escalade, the brakes became very spongy, and air was leaking
m>at the firewall where the rod goes into the booster. Do i need a new
When air leaks into the booster, vacuum, therefore vacuum-assist decreases,
leading to a *harder*
However, if air gets into the hydraulic system, or the MC is failing, that
can show up as spongy brakes. There could be other reasons as well.