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MPG problem V70-XC70 1998

posted by  KlausC on  Mon Nov 14 15:30 CST 2011
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

14-16 is dismal and it's not even cold yet. I think 18 is relatively poor around town. Mine needed a new O2 sensor to get the mpg back to 20-21/28 highway.

Unplug the ECT sensor and prob the sensor for resistance when cold and hot. It should be:

0C = 7300 Ohms
20C = 2800
40C = 1200
80C = 300
100C = 150

Almost a straight curve. Any resistance much higher than those numbers indicates a colder engine = equals more gasoline used.

Klaus
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