That's what my mechanic did and he found thatstangGT97 said:what was his "electrical test"? You need to check primary and secondary resistances to see if they are to spec, that tells you if they're going bad. Have you been having misfire problems? If you want I can give you the resistance specs so you can check them yourself... I think running replacement Motorcraft coil packs will be your best bet if your car isn't highly modded
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