Dad recently purchased a used '03 and it already has the SixGun installed. The selector switch has 6 positions, but whoever had it before must have pulled the Speed Loader 'cause it ain't there. We went through the "learning" process, and the thing still does nothing. Something set a "fuel rail pressure high" code, but there is no difference in boost or acceleration from setting 1 to 6. The little LED indicates that everything is just fine and dandy. Without the unit throwing any of its own codes, Banks is of no help over the phone. Just wondering if anyone here has any helpful info.
TIA
TIA