i bought them in 2008 buy only have about 1000 miles on the truck since then. The truck just started sputtering while driving. I wiggled the coils and checked the plugs on them then the truck was fine until it happened again today. I pulled them all and changed the plugs. The coils looked perfect with no moisture or anything yet the truck would misfire when revving. I swapped the stockers back in and no issues. So one or more went bad. Hopefully I can get them warrantied considering they were the mor expensive EFX and I like how small they are.
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