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O2 sensor -- original with 158K miles

posted by  guYom on  Wed Dec 10 14:05 CST 2003
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last visit: Fri Jul 5 17:35 CST 2013
[RELATED]

I am getting 18 miles a gallon with suburban driving. Have already replaced air filter, oil, fuel filters, plugs & wire, distributor cap & rotor, cleaned the throttle body and flame arrestor.

The O2 sensor is orginal, I read in Haynes that on an 89 brick it should be replaced at 50K miles.

O2 sensors cost between from $50 to 100 or so, should I replace it? Will not hurt, but will it help my gas mileage? I am thinking maybe I am running rich...

What do you think?
--
'89 244DL M47 158K miles






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