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Leave them alone unless you have a misfire issue or a studder in over drive.
There is no assurance you will benefit from replacements.
The ACCELS are among the worst you can get no matter the price.
Good luck.
noticed they had them at Rock Auto for a decent price...the motorcraft units
and I am coil-pack shy? had a few coil packs fail and cause the pcm on our 2005 Ford Escape 3.0 fail...on the freeway...needless to say THAT was a sobering experience lol