Will not stay running

Welcome to 2CarPros.

I don't suspect the horn is the cause of the no start. Chances are the horn itself is bad if you hear the relay.

Next, have you checked the fuel pump relay? Does it always start right back up after it stalls?

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

I attached a picture of the relay location.

Let me know.

Joe

Welcome back:

I need you to check if the fuel injection pulse is lost. I question if you have a bad cam sensor. The sensor is in the distributor. I attached a pic. I'm wondering if you are losing signal to the injectors.

Here is a link that explains how to check the injectors for a pulse,. You will need to use a light to see if the light stops flashing when the engine stalls.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Since you can keep it running with pouring gas in the intake, then there is no fuel getting to the engine. Also, if you haven't, check the fuel pressure. I know you replaced the pump, but something is preventing from getting to the engine. We need to determine what it is. This isn't an ignition related issue.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know what you find.

Joe