Why does your 95 Buick lesabre idle rough after it is warmed up?

A rough idle in a 1995 Buick LeSabre after it warms up could be due to several factors, including a dirty or failing idle air control valve, vacuum leaks, or issues with the fuel system such as clogged fuel injectors. Additionally, worn spark plugs or ignition components may cause misfires at idle. It's advisable to check for any diagnostic trouble codes and inspect these components to pinpoint the issue. Regular maintenance can help prevent such problems.