how to clean computer on a 2005 grand vam

Asked by PGREG May 22, 2013 at 03:39 PM about the 2005 Pontiac Grand Am

Question type: General

very poor gas mileage on 2005 pontiac grand am have already replaced sparkplugs fuel filter and air filter is there something wrong with the computer or a sensor.
how can I fix gas mileage from 550kms to a tanf of gas to 320 kms to a tank of gas

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