Vacuum Port?
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Joined: Aug 2005
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From: Phoenix
Vacuum Port?
i have a carter AFB and it has 2 vacuum ports on the front and i want to know what the difference is in tham and which one i should use or if i should use both cause i haven't the slightes clue
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Joined: Dec 2001
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From: Louisville,Ky.
The one on the passenger side is ported vacuum (only has vacuum when you open the throttle) and is normally used for the vacuum advance on the distributor. The one on the drivers side is manifold vacuum and has vacuum all of the time. It can be used for vacuum accessories such as the modulator valve or the hot-air flap on the factory air cleaner(which you will need to keep the carb from icing up in the winter). If you do not need another manifold vacuum port, you can just plug it.
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