Rough idle, stalls

This is unlikely to be a timing chain issue. It sounds more like an idle control issue.

I would suggest starting with the basics to find out if there are any codes or other signs that would point to a timing chain issue. Here is a guide that will help with pulling codes:

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

If there are no codes then we need to inspect the throttle bore for carbon build up and clean it if you find any. Here is a guide that will help with this:

https://www.2carpros.com/articles/throttle-actuator-service

If none of this checks out then I would suggest checking for a vacuum leak as that is the next most likely cause of this.

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

Below you will find the process to relearn the idle and the throttle blade closed position. This will need to be performed if the throttle is cleaned so that the PCM can learn the new position as it will likely change slightly.

Please let us know if you have other questions and what you find.

Thanks