What are the common causes of a cylinder 5 misfire in a 2005 Kia Sorento?

I changed the timing belt, checked all the coil packs, put in new plugs, and even replaced the injector in cylinder 5, but I’m still getting a code 305. The engine has a slight miss at idle, but it seems to go away when accelerating. There’s no noticeable engine noise, just the miss.

Any ideas on what could be causing this?

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@Unclewaffl3s

Despite the thorough maintenance, the persistent code 305 and idle miss in cylinder 5 remain a mystery. While the miss disappears when accelerating and there’s no noticeable engine noise, it’s perplexing. Check the fuel injector wiring and compression in cylinder 5 for potential issues. If the problem persists, consulting a professional mechanic with diagnostic tools might be necessary.

After my TB change, I was still using that code. It was the fragile harness connector, as it turned out. Things are rearranged. Two cylinders are affected by a coil. It is feasible to use a wire. Even with broken interiors, they can still appear to be in one piece. I doubt it’s the ICV if it didn’t have the code prior to the TB change. But anything is conceivable.