Rough idle and no acceleration

Do you have any check engine light or have you checked for codes?

Here is a guide that runs through the basic causes of low power. However, I am not convinced any of this is the issue but we need to make sure.

https://www.2carpros.com/articles/engine-has-low-power-output

Once we rule this out we need to know if there are codes. If you cannot pull codes then most parts stores will do it free of charge.

Lastly if you have access to a scan tool, we need to find out what the o2 sensor data is saying. Specifically the short term and long term fuel trims.

Depending on what we find we can run those tests. If no codes or anything specific to go on, I have some ideas but clearly we need to check all this and most importantly what codes are there before we start trying them. Thanks