Engine Performance problem
1998 Oldsmobile Intrigue 6 cyl Front Wheel Drive Automatic 110000 miles

My 1998 olds intrigue has a hesitation and stalls. It all started 5 days ago and I have not driven it more that a few miles since. It starts to hesitate anytime after about 1 mile of driving. It has stalled on me four time time, all after the car has warmed up. The first three were within about 1/2 mile. Also, when looking over the engine after the stalls, with no on in the car, it reved up then wanted to die. It does this several times then idles smoothly for a minute or so the repets. We change the spark plugs and are concidering changing the coil packs. Do you have any suggestions we can look at first?

Thanks ...
Rick ....