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Identify vacuum line

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Old Dec 9, 2020 | 02:49 PM
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Default Identify vacuum line

What does this vacuum line do? It is near the oil dip stick and AIR tube that goes to converter. Looks like something under the exhaust manifold. Could not find it in shop manual.
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Old Dec 9, 2020 | 06:39 PM
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Mentioning the year in your query might help us help you.
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Old Dec 9, 2020 | 06:49 PM
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Any chance it goes to the choke element to heat up the choke coil faster? I.e. pull a slight vacuum on line, pass it up to the carb choke coil and warm the coil quicker?
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Old Dec 9, 2020 | 08:37 PM
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Car is 81, line is attached below manifold to some type of control
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Old Dec 9, 2020 | 09:13 PM
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I will take a stab at it...
Is it the EFE heat riser valve?
Does this look like your part?
E-BAY LINK:https://www.ebay.com/itm/1980-81-Cor...oAAOSwfdZfUR3w
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Old Dec 9, 2020 | 09:51 PM
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Looks like it, thought was on driver side but this on passenger side.
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