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Horrible MPG S70 1998

Recently I've been making horrible mgp...13 in the city and 20 hwy. This began shortly after the 50k tune up. I've replaced the spark plugs again thinking that after market vs. volvo plugs would make a difference but to no avail. The OBD-II system is not pulling any codes, but I suspect faulty HO2S's. Before I begin on a wild goose chase any insight would be greatly appreciated.






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New Horrible MPG [S70][1998]
posted by  PMCS70  on Sun Mar 19 10:31 CST 2006 >


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