2002 Oldsmobile Alero v6 Engine Issues, Help

Lately I have been having some trouble with my Alero. When the car is sitting in park I have noticed that the engine idles roughly, And when I try to drive it, the car hesitates on the acceleration every now and then. Also the emissions light (the orange one) will come on for awhile and then dissapear. At first I though it was dirty fuel injectors so I added some Fuel injector cleaner, but that has not fixed the problem. I was thinking the park plugs may need replacing?

Has anyone else had this problem?

By "emissions light" do you mean the "check engine" light? You need to have the codes checked and post back what is stored. When is the last time the plugs were changed? or the fuel filter? It may just be due for a tune-up.