Searching for a Mopar Mechanic near Chicago"

Never thought I could be more lost than before.. But this guy accomplished something.
What we've gathered is buying said kit and throwing it in did not net us any gain.. In fact, car runs worse. Have we Timed it? or adjusted carb? have we confirmed it's hitting on all 8 cylinders mechanically, have we checked ignition and fuel? or is said kit still in box just riding in passenger seat and we hope it makes engine faster via Bluetooth. Please advise