Thread: Intake manifold plug - what is this for? (noob question)
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Old 10-06-2009, 03:02 PM
Argess Argess is offline
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If it's into the water jacket, it's probably for a factory hot-idle switch.

If it's into the manifold vacuum, it's probably for a factory anti-backfire valve.
Last edited by Argess; 10-06-2009 at 03:12 PM..
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