I have done a search on this and found this thread which kinda describes my problem...but with a 2.4L.

http://www.j-body.org/forums/read.php?f=11&i=151091&t=151091#151091

I have a 98 sunfire with the 2200 engine. It has 139k miles on it. I bought it in '08 with 114k. Since I have owned it I have changed the plugs and wires (AC Delco plugs, NAPA wires), timing chain, fuel filter twice, intake manifold gasket, trans flush and fill (NAPA trans fluid, and a container of Lucas trans additive), radiator flush, and oil changes every 3k without fail. The car runs like it has only 40k miles on it, and quiet as hell for a car with 139k miles. My only issue is that if I start my car after it sits for awhile, and go to drive it without letting it warm up for a couple minutes. Put it into gear, and press the gas, the car sputters and bucks, and sometimes stalls completely (just like the car in the thread I found). After that the car runs fine. Any ideas???

Also, I forgot to mention that it doesn't matter what the temp is outside...whether it's warm or cold outside it sputters and bucks if I don't let it idle for a few minutes.