Loss of power when shifting

There are a number of things that can cause this. here is a guide that will get us started:

https://www.2carpros.com/articles/symptoms-of-low-engine-power

We need to focus on checking for a vacuum leak. More then likely this will cause a slightly rougher idle so we need to check for this as well.

Then when you rev the engine it should smooth out.

Here is a guide that talks about this:

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

Once we know for sure that these issues are ok we can dig further however, I suspect we will determine the issue based on these guides. In the event that they do not, we need to check for codes and go from there. Thanks

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing