Sounds like the little disk type check valve is leaking (one on the
engine vacuum line).

Stan
On Tue, 22 Oct 2002 15:30:15 -0400 Vanagon man <vgonman@MSN.COM> writes:
> On my 81 I have a one year old brake booster.  Recently started
> having a
> problem.  When I come to a stop if i have my foot on the brake for a
> few
> seconds, the boost goes away and the pedal is hard as a rock.then if
> i give
> it some throttle the boost kicks back in.  I have a vacuum gauge
> attached to
> the booster line, and when i come to a stop vacuum goes all the way
> to zero
> if i keep my foot on the brake..............
>
> Ideas?
>
> Adam P
> 81  Westy "The Brick "
> 70 Single Cab "Whitey"
> 74 Beetle "Ol Yeller"
> 73 Transporter (STILL at paint shop)
> 1988 Vanagon Wolfsburg
> 1976 Transporter (New CA bus)
> 75 Campmobile "for sale'
> Used Vanagon Parts for sale (mostly aircooled)
>
>

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