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Originally Posted by Oregonite
I have a Holley 390 cfm 4160 carb. on my Jeep AMC 258 c.i. and noticed that one of my air mixture screws is really sloppy and loose fitting. Would this affect the air mixture and the way it runs? Would replacing the air mixture screw gasket fix it?
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The little gasket (Cork or O ring) is what keeps the needle valve from moving in or out changing the adj. and causing constant re-adjustment is what you need. Replace both of them at the same time.
