why is car sputtering on 2000 Saab 9-5

The car is sputtering as I am driving kind of jumping forward. It's smooth for a while then it starts sputtering again. Any idea why Thanks

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1 answer
This may be due to an engine misfire or a transmission problem, but it's hard to know without driving the vehicle and performing some tests. Is the check engine light on? Have you had it looked at for this problem?