whatsup

Want to know if the tube sticking out of the back of a Motorcraft 4300
carburetor (Ford 429)directly underneath the Hot Idle Compensator should
be hooked to vacuum hose or something!

Backyard Mechanic

"whatsup" <cmelchapholt123@aol.com> wrote:

> Want to know if the tube sticking out of the back of a Motorcraft 4300
> carburetor (Ford 429)directly underneath the Hot Idle Compensator
should
> be hooked to vacuum hose or something!
>

Caveat: From a guy who HATES carbs!

The real question is: What vacuum lines on your engine are un-connected?

Almost all ports on a carb reflect either manifold vac or air-flow
through the venturi's.
And noone should be tuning a carbed engine without a vacuum gauge..


Hook a vac gauge to the port, does the vacuum increase or decrease as the
engine is put under a load and throttle opened?

My thoughts: just cap it off
--
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

Rick

"whatsup" <cmelchapholt123@aol.com> wrote in message
news:cf6206960c2d9e58291fab17957d6105@localhost.talkaboutautos.com...
> Want to know if the tube sticking out of the back of a Motorcraft
4300
> carburetor (Ford 429)directly underneath the Hot Idle Compensator
should
> be hooked to vacuum hose or something!

I have the manuals for 1971 but it's not clear-I think it may be the
vacuum source for the air cleaner doors...