Help with 88' Corolla

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My 88' Toyota Corolla needs some help. Its my first car with a carburetor. Well getting to the point, At the back of the carburetor there is a stem that comes straight down about 4" long that drops behind the carburetor. About 1" down for the bottom of the breather cover there is another stem that comes out about 2" and is not hooked to any hosing, this one is about 3/4" in dim. The longer part of the stem connects into a rubber hose that runs into the back of the catalist conver via metal pipe. I know i need the get the catalist conver replaced because it is clogged. But I need to know what the other stem connects to. ?Is it some other part of the vacume system? I have no clue and no one else i ask knows either. Please help.-Tim. :thumbs:

posted by  G|-|ost

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