2011 Mustang GT check engine light on

[winnertakesnothing]

Hi guy, I recently bought a 2011 Mustang GT. The previous owner installed a remanufactured engine back in 2020 and got all engine related components replaced including fuel injectors, spark plugs and coils. After purchase, I took it to a mechanic and discovered that the car displays a solid check engine light and throws engine misfire codes P0300, P0301, and P0306. I was told that the spark plugs and coils were aftermarket components and so I got them replaced. The mechanic cleared the codes and asked me to drive 40-50 miles. Shortly after driving the check engine light came back. Here is the link to a video which demonstrates the engine tick: . Could the ticking be due to faulty components such as fuel injectors, intake manifold, etc, or could it be due to engine malfunction? I would greatly appreciate any comments or suggestions on how to resolve this issue. Thanks a lot!

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[slime_bullet]

Um that ain't good boss. That ain't a tick, that's a knock