>> Nope! Any hiss from the vacuum server when the brake pedal is not being
>> depressed probably means a leaky servo diaphragm. Unfortunately, these
>> cannot be repaired so it'll be a new servo ... 8-(
>
>What if it only hisses when I depress the pedal?  The harder I stand on it,
>the louder it hisses..

Well, they all hiss while the pedal is BEING depressed. The real giveaway
is
if they hiss when you stop and switch off the engine. If it still hisses,
then
trouble!

My symptoms usually manifested when I pressed the pedal a few times in
succession. After about 3 or 4 presses, the pedal got much harder & I
really
had to stand on the thing to get the vehicle to stop. Scary ....

Pete C

--
Peter Cassidy,                   pcassidy@apple.com
Sr. Dev. Engineer                +353-21-284316
WW Operations Engineering
Apple, Cork, Ireland.