Originally Posted by a2k
if it just gets harder when the engine is off, it could be a leaking vacuum resivior for your brake booster, it just doesnt hold it long enough...coincidence maby...just an idea, good luck man
could it be that they might of drilled a hole into the brake resiviour?
a hole needs to be made in the firewall to pass some wires through.
Check if your leaking brake fluid