fuel injector replacement?

If you have a misfire on one cylinder, I would swap the injector to another cylinder first just to make sure it is the injector. The misfire should move to the cylinder with that injector.

I attached the process for replacing the injectors. Let us know what questions you have.

Here is also a guide that will help:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Thanks