Lack of power, backfires when accelerating

Welcome to 2CarPros.

Have you scanned the computer for codes? I would do that first if the check engine light stays on while the engine is running. First, here is a link that explains about backfiring.

https://www.2carpros.com/articles/engine-backfires-while-running

Now, since there is a power loss, my first suspect is low fuel pressure. Here is a link that explains how to test pressure:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Here are the manufacturer's specs for pressure:

Fuel Pressure No Vacuum 38 to 44 psi

Now, if that checks good, next I would check for a plugged catalytic converter. Here are a few links that explain symptoms, how to check one, and in general how they are replaced:

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

https://www.2carpros.com/articles/catalytic-converter-replacement

Let me know if this helps and the results. If you have other questions, let me know.

Take care,
Joe