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2006 ls with 78,000 miles pings (detontion)under hard aceleration with 93 oct.f on 2006 Lincoln LS

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Higher octane fuel does not help.it have new spark plugs and coils. no help at all.where do i start
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