2012 Civic acts like it has a vacuum leak. Any suggestions?

2012 Civic acts like it has a vacuum leak. Any suggestions? - 1
Added (1). 2012 Civic Automatic, 175k miles

My car has sluggish acceleration in any weather *above* 45 degrees F. When it's cold out, my car takes off like a bat out of hell with pretty much NO acceleration problems. Once it's warm, forget it, it's like driving a turtle.

I had the vacuum lines smoked, no leaks found. Fuel system and throttle body cleaning was just done at Honda last week, no luck.

Fuel trims are STFT 7%, LTFT 7%, which is slightly lean, but I can't figure out what the hell's causing it.

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