Have a 1997 Buick Lesabre that will start but will die after 4-5 seconds.Help

mass air flow sensors had big issues in that yr. with car idling tap on mass air flow lightly with a screw driver handle, if car dies repl and that should repair the issue

Check your fuel injectors check u tube on how to clean also idle sensor EGR VALE PCV VALVE MAP SENSOR AIR INTAKE BOX ONE GUY FOUND A DEAD MOUSE IN HIS YIKES! Good luck.