Q: Laboured idling and backfires

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My truck first started with a sputter between 45mph and 55mph while in traffic but if say I was going from 30 to 60 as if getting on the highway it wouldn't do it. Now it has Avery rough idle and it backfires when you take off. And no SES light has been kicked

My car has 154616 miles.
My car has an automatic transmission.

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