sorry its got cold air 4 inch ext bully dog tuner after market tranny dont know what was done too tranny 33inch tires no lift i have about 145000 k on it and i have done both still dont know what too say
My guess is that it's something in the BD tuner. Something to do with the boost and PW would be my guess. The tables for fuel and air could be hitting the sweet spot for fuel economy with a little more throttle position do to the load as opposed to no load.
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