sputtering and jerky idle

[mranderson]

Hey guys, i think this is my first post, i have been here for a while but just as an onlooker. You guys are very good at helping out!! so here we go

Just about every time i run my car now, not long after a get going it starts sputtering a little. It is only noticible on low rpms. When i let it come to an idle it begins to jerk quite bad. Like the whole car shakes from the jerky idle. then once i give it gas again it continues on into a sputter. I dont know a whole lot about cars and such but i really need to get this fixed. I recently replaced the spark pulgs to see if that had something to do with it, but runs the same. Could it be the fuel filter or maybe the oxygen sensor?

Thanks very much for your help.