My 1992 buick lesabre quits running from time to time while driving it.

DO YOU HAVE CODES? COULD BE MASS A//FLOW SENSOR

Fuel pressure regulator, in the fuel rail....... about $70.00...... for the part.

Check (have the shop check) the main computer that controls the ignition as well as the ignition / spark control module. The main computer was replaced on my 1987 Olds Delta 88 when it would shut down without warning. That fixed it until it started missing and shutting down. The Olds dealer's service shop kept it on an analyzer and running until it happened again. They replaced a couple of ignition coils as well as the ignition control module. That part is under the ignition coils. After those repairs it did not stall again. And there were no Service Engine codes.