Starts but will not stay running?

It sounds like the exhaust system is clogged or the fuel pump is going out. When the engine stalls can you hear the fuel pump working in the fuel tank? If not, I would replace the fuel pump. If you can hear it, I would remove the exhaust from the catalytic converter.

Here is a guide to help you and I have included how to change the fuel pump out just in case you need it:

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

Here is how you can drain the tank:

https://youtu.be/Q5MH2gnyFH0

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.