Stalling, loss of power, will not start when hot

Okay. The Freon leak is not related to the stalling or lack of power.

I attached a couple guides on low power and then one on MAF sensors as this sounds the issue if it is not fuel related.

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

https://www.2carpros.com/articles/mass-air-flow-service

Here is a guide that explains how to inspect for a leak in the AC system:

https://www.2carpros.com/articles/air-conditioner-leak-detection