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Re: 97/98 2.5 petrol Sport - lumpy running
My thinking is the same; these engines are recommended to have spark plug changes every 30000 miles, regardless of apparent condition. Cap and rotor should be on the same schedule. I know when I had my 97 Wrangler with the 2.5 it ran much more smoothly after changing those parts.
Post back once you get them done and let us know how it's running.
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Ours: 2020 Jeep Wrangler 2.0, 53k
2013 Toyota FJ Cruiser, 84k
Kids: 2005 Honda CRV, 228k
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