I recently had my spark plugs replaced, replaced my radiator, had a belt replaced, an oil change, and had my head gaskets replaced. Today I noticed that my car slightly trembles while in idle. I've also noticed my car losing power when going uphill, it lags big time. Also, my check engine light came on a couple of days ago, and got a code. The code was for a small exhaust leak, and the clerk told me it shouldn't be a problem. I'm hoping it's just a loose spark plug? Someone help!
My car has 135000 miles.
My car has an automatic transmission.
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