Why does a 92 buick regal runs fine then stalls out. restarting is hard and runs rough

SOURCE: 1999 Buck Regal Stalls While Driving

check ur to see if ur catalytic converter is clogged

SOURCE: 1991 buick regal starting and running problem

Sounds like your car is overheating. If you have a temp gauge it should show that. If you just have an idiot light, by the time it comes on it's already too hot to operate. AFTER the car is cooled down, open the radiator cap to see how much coolant has been lost. Chances are there is alot missing. Add WATER (no sense in adding coolant if it's going to leak out) and idle the car at home. Look underneath as it warms up to find where the leak is.

SOURCE: ENGINE IDLES ROUGH, BUT RUNS FINE WHILE DRIVING

Check all vacuum lines for leaks. Check spark plug wires for and spark plugs that may be worn and causing idle misfire.

SOURCE: I have a 1991 buick regal stalls and shut off after warming up

egr valve is not opening up when the engine reaches it normal operating temperture

SOURCE: 2000 LeSabre starts but runs very rough and stalls. After

My 2002 Lesabre (app 115000 miles) started something like this. Also the loose gas cap had been coming on for quite a while. I replaced the vacuum line from the air intake to the fuel sensor. It is under the engine cover (twist off the oil filler to remove the cover). There are two hoses together that come of the air intake. The small one goes to the top of the engine. The other goes across the front and makes a 180 turn back to the sensor. Chances are the 180 piece is cracked. It all comes from the dealer as one unit. $25
Seems to have fixed my problems. So if your car is running a little rough. Shutters under load. If the gas cap loose is coming on or probably a number of symptoms this might be the answer. I would replace this item. A cheap try.