Will not idle, shuts off when RPMs are below 2,000?

Are there any trouble codes? You can get a code scanner from Amazon for about $20.00.

Here is a guide/video to show you how:

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

Here is a scanner link:

https://amzn.to/3Qi1SS6

Also, if you can shoot a quick video of what the engine is doing it will help us fix it, you can upload it here in your response. This guide can help as well:

https://www.2carpros.com/articles/stall-at-idle

Does the engine make a strange noise at all? Please run down these guides and report back.