Question about 2003 Ford Expedition

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In the past four month I have replaced catalic converters twice on the left and once on the right...need help thanks

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This is a ENGINE PERFORMANCE Problem, The Check Light Should Come on and Lead to the DIAGNOSIS of the Problem, Most Likely a Poor AIR / FUEL Mixture Problem that Melts the Cat/Converter. A Major TUNE UP is in Order here ALSO if it has not been Done Yet.

Posted on Sep 27, 2009

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