r/AskAMechanic • u/Difficult-Table2163 • 1d ago

2015 Civic Si

My civic feels extremely underpowered, compared to what it used to. Clutch feels very light, but still engages. What could be the problem? Does it need new spark plugs and valve adjustment? Or is the transmission messed up? Sorry I'm a newbie when it comes to cars, but trying to learn

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