1992 Jeep Wrangler won’t stay running

my 92 wrangler wont stay running, I’ve replaced everything and it starts for a couple seconds and then dies

Apparently you haven’t replaced everything or it would be running.

Seriously, explain your problem, what you changed and why you changed it. Tell us a bit about the car - mileage, engine and transmission type, any error codes you can pull up and we’ll see if we can help.