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Do you suddenly see an mpg jump on the ultra gauge? My ultra gauge shows 0.000 when im in lean burn. Most likely it is the same on your car. You have to really learn how to get it. What does your gauge read when you are decelerating in 5 gear? Try driving at around 40 mph on a road, let your foot most of the way off the gas pedal but not all the way. What does it voltage does it say then?
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