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my maintenance skills are pretty minimal and i'm wondering if anyone can suggest when spark plugs and wires should be replaced. my car is just over 90k miles and i've noticed recently that i might be 1-2 mpg lower than what i'm used to. local shops are saying because it's so time consuming to replace the spark plugs on the '02 maximas that labor added to parts will approach $500. i'd rather not spend this unless it's necessary.
otherwise, anyone know of someone in the minneapolis area that is able to do this on the side for cheaper?
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