1999 saturn wagon, sputters and jerks when accelerates.

Check you spark plug wires, spark plug, and distributor cap and rotor. Make sure the spark plugs are gapped correctly and they do not look worn or fouled. Find a relatively dark place, start the engine, raise the hood, and look for blue arcs (sparks). A little windex sprayed on the wires will enhance this effect. If you see these sparks, replace the wires, and your problem should go away.