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1997 Toyota Corolla Question: Until recently, I have had excellent gas mileage. Now I am getting 6 miles/gal.

 

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kepimilton52, 1.8L 4 Cylinder, Naalehu, HI, January 15, 2013, 13:59
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I also have black soot in tailpipe and a heavy smell of gasoline. No puddles or holes under the carriage. Could it be front and rear oxygen sensors?

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