[dremd]

If your Booster is going bad, check for brake fluid leaks, the majority of boosters I've seen fail had leaking master cylinders associated with the failure. I assume that the leaking brake fluid degrades the rubber diaphragm.


Disconnecting Battery only works on Some cars . . ..

Booster CAN be a pain to change out.. Take a look at it. Typically there are 4 bolts through the Firewall, the actuator rod attached to the pedal, and of course the master cylinder / brake lines.

Best way to check for vacuum leaks is either with a can of either, or a propane torch (BOTH NOT LIT) when you spray the leak you idle will smooth out, and you'll know where the issue lies.

There is also a test procedure for boosters. I can't remember it exactley, but essentialy.

With engine off "Pump" brakes up till the pedal is SUPER hard.
Start engine with foot on pedal
Pedal should SINK to the Floor
If it does not you have a booster issue/ HUGE vac leak.

I'd do the Either check for vacuume leaks first.

Good luck