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total scam, its basically mimicking the same theory as the tornado. but fact is the O2 sensor isn't gonna let the engine run rich or lean, you add nore air, its gonna richen the mixure, you add more fuel its gonna lean the mixture. Its hogwash. and this guy has aperantly never seen a gummed up carb from a car that has sat in a barn with old gas. he is full of crap.
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