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Old 02-03-2004, 03:44 PM's Avatar is offline Moderator
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What manifold do you have? Sounds like a single plane and the passenger side isn't feeding anything. If it is a 180deg manifold, doesn't make sense. Best way to set those screws is by manifold vacuum. Adjust them for maximum vacuum @ the same port used for distributor advance. If the one screw doesn't affect vacuum at all, that barrel isn't functioning.
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