95 buick is stalling and hard to start sometimes?

I have a 95 buicklasaber with a 3.8 after running for a while it will stall or miss really bad.It also has a hard time starting sometimes it dont do it all the time.When it is hard to start the car has been run for a while and was stopped for a few minutes.Thanks for your help.95 buick is stalling and hard to start sometimes?Sounds like a catalytic convertor problem, something clogging your exhaust. Does it accelerate normally when the throttle is mashed to the floor, quick response? If not, you can unhook the convertor long enough to see if it makes a change.95 buick is stalling and hard to start sometimes?check engine light on or off