Making An Off-Road Carburetor - Cheap Avenger
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Although you don't need to pull the fuel bowls, a vacuum-secondary Holley four-barrel is dirt-simple to rebuild, so we pulled our 390cfm version apart for illustration. If your engine is blowing black smoke or surging and you have a strong gas odor, chances are the power valve (center) is blown. Holley sells replacements on its web site. View Related Article
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