Runs but shuts off when shift into gear

Good morning,

Is the engine idle correct or is it high or low?

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

Can you give it some gas and it will idle?

I need as much information as you can give to us.

Can you upload a video of it stalling?

There is an idle air control that could be causing it to stall as well as the throttle body being dirty.

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

https://www.2carpros.com/articles/throttle-actuator-service

Roy

Don't know anything about the car thinking of buying it if it is an easy fix.

Not at this time. I cannot see it, touch it or diagnose it.

I need your input to help you determine the issue.

Again, can you upload a video of it when it stalls?

Roy