Yes follow the vacuum line from the intake through the firewall.  Sounds
like it is leaking where you can't see on the back side of the firewall.

Ken

On Tue, Feb 16, 2016 at 3:16 PM, John Rodgers <jrodgers113@gmail.com> wrote:

> Have hard pedal. No brakes to speak off. Dennis Haynes said suspect a
> vacuum leak. Have just gone over as best I could the vacuum lines in the
> engine compartment. With the engine at idle I hear a very distinct sound
> like someone drawing kn a deep breath. That to me is like air being wher it
> shouldn't. The noise is in the vicinity of the thermostat housing, but I
> can't pinpoint it exactly. Is there any kind of vacuum line or device in
> that area that I might be missing? It's fairly loud.
>
> John
>

--
Thanks,
Ken Wilford
John 3:16
www.vanagain.com