Scotty, I have a 2005 Camry. I changed the engine after it was overheated. The car shakes behind red…

Scotty, I have a 2005 Camry. I changed the engine after it was overheated. The car shakes behind red light and shakes harder with the AC on. Also, the check engine light came up. I connected the diagnostics device and the code is "Cylinder 3 misfire". What do you think is the problem and how do I fix it?

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