Code 34, runs good for few minutes then shuts off?

Hello, it looks like code 34 is MAP signal Low, the MAP sensor has 3 wires, one is the 5volt Reference, the 2nd is a Ground, and the 3rd is the Signal wire. So, you can first unplug the MAP sensor and with the key on you should read 5-volts on one of the three wires. You can verify the 5-volts and Ground at the same time with a multimeter set on DC volts, don't push the meter leads into the MAP sensor connector, use some back probing pins and go in through the back of the connector so you can check the sensor when it's plugged in as well.
When the sensor is plugged in, key on, engine off, you should read a higher voltage level near 4-5-volts. Then when you start the engine and there is High manifold vacuum you will read a lower voltage level 1.2-2volts roughly. It's possible that the MAP sensor signal is shorted to Ground somewhere, which you will notice when you check the MAPs signal at Key on engine off. Any sensor that uses the same 5-volt reference as the MAP is shorted to ground it will pull the entire 5-volts down to 0volts. If it happens to be just the MAP signal shorted to Ground, it may be that when the vehicle goes from Open loop operation (cold start up) to closed Loop after warming up and starts looking at the MAP sensor signal for its fuel strategy the vehicle stalls out.
But the MAP circuits are very easy to check, if you have two wires that are reading 0 volts, that's the Ground and a shorted signal wire. hence the circuit low code.

Here is the MAP sensor wire colors and back probing technique:

https://www.2carpros.com/articles/how-to-use-a-voltmeter