This might be redundant. But the '06 XB12Ss running strong and fine until 3K. Then transient miss (call it a hiccup, because that is what it feels like). Sometimes under load and other times at constant throttle position (like I said...transient). Fuel=93 octane(no ethanol). Injectors=clean. Plugs=NGK Iridium. It's mid-December in Northwest Illinois, so anything I do cannot be road-tested for quite awhile (phooey). Any and all suggestions will be appreciated. And, THANK YOU. In advance.