2002 runs rough, backfires, no codes

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Dartman76

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Joined
May 27, 2023
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Location
Harrison AR
My 02 started with codes for misfires and o2 sensors. Changed 2 coil packs and right side O2 sensors. Started to run much better but still idled a little rough. Got worse, wouldn't rev over 3k, no power, keep trying to rev and could get it over 4k then it would run ok. Now can't get it to rev over 3k again. Replaced fuel filter no luck. Any help would be appreciated
 
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