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granthendrickson replied to the thread Spark plug.I’m running headers so it couldn’t be the butterfly on the old manifold. I will check for a leak in a minute, the sound goes away when... -
granthendrickson replied to the thread Spark plug.Something that I stupidly left out of the post is that the right side idle mixture screw is wollowed out and isn’t able to lean out.
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I do not know why one side is clean and the other not,but that is how plugs look with a leaky intake gasket,clean on one side.
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granthendrickson replied to the thread Spark plug.Okay thanks, will do. Do you know why only half the plug looks brown and the other half is white?
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I'd check for an intake leak. Top side spray with carb cleaner around all the intake ports,listen for an idle change. Bottom side, pull...
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Has anyone seen this on a plug? If so what is causing it? Engine is a 355 with 3,000 miles and is running rich. It makes what I think...
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