I think Italian tune up means you maybe put some Regane or similar product in the tank, maybe spray down the throttle body to clean it up some or use Seafoam in it and then get out on some isolated highway or on the interstate and just drive the [censored] outta the car for a half hour or so. Various high speeds and romping on high rpms for as long as you and your engine can stand it. Or until you get a speeding ticket, whichever comes first.
Others here will have variations on this theme, I am sure....
Others here will have variations on this theme, I am sure....