1998 Saturn SW1

Engine Performance problem
1998 Saturn SW1 4 cyl Four Wheel Drive Automatic 70,000 miles

This problem hasn't happened very much, but wanted to know what was going on before it got worse. Okay, here's the thing, when I begin to accelerate mostly coming up a hill, or just came over railraod tracks, my car will jerk (3x max), it doesn't do it all the time, mostly almost to never. Any suggestions? Im' lost =)
November 20, 2008.

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