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Showing results for tags 'intune i3'.
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I searched on here and didnt find much (maybe im just terrible at searching) but I recently tuned my 18 Sierra 5.3 8 speed with the Diablo inTune i3. I selected the canned MPG tune to start and planned on getting custom one later. I also have a Borla Atak and S&B CAI and no leveling kit or lift. With the CAI and Borla Atak I was averaging 18.6 MPG. I tracked this using my 74 mile round trip travel to work for 3 days in a row. After tuning it dropped too 15.4 (I did the math from trip log and didnt just use the trucks MPG tracker)..same route, temperature changed a bit but my driving habits are the same. My commute to work is mostly back roads where im doing 55-60 mph. Anyone else ever have any issues with MPG loss after tuning? Everything I read lead me to believe that the MPG would go up. I'm just more concerned that I did something wrong while tuning. Any help on this issue would be greatly appreciated. Thanks guys!