There is supposed to be a one way valve installed on all vacuum boosted
systems. This will normally give one decent stop with the engine dead, and
lesser amounts of boost until all the vacuum is gone. Then you need a
quickie course in evasive maneuvering, and a change of drits!
<Re: RE: Brake servo
<Putting in the clutch if driving a stick and the engine has died makes the
power brakes go bye bye. Not sure how an auto reacts tho. Downshifting on
the manual helps slow you down, plus gives you vacumm for your booster.
/// (If they are dupes, this trailer may also catch them.)