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.

Have you tried the catalytic converter - anyway I think it's time to take your car to a professional repairs and servicing workshop expert t that's been fixing cars for about 20 to 30 years or so - or it could be a electrics fault in which case a auto electrician shop may be able to assist you further

You must drive all if your awaken hours.

"Acts like a vacuum leak"? Go to a mechanic if you are having issues with the way your motor is running. I'have a hunch you're the kind of person that will just guess and start throwing parts at your car and waste a ton of money. You check the fuel trims to diagnose if the motor is running lean. A lean code can be caused by many things. Have you even had your valves adjusted at 60,000 miles> All Honda's have a tendency to get tight valves.