Misfiring

Have you pulled the codes to determine which cylinders are missing?

I attached the testing for misfires assuming you have a P0301,2,3, or 4.

Clearly there are other things that can cause a misfire but we need to limit them down. Let's start with the codes and go from there. Thanks

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

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