Maybe I'm getting cynical with age, but ....

71dartswinger said
my wifes expedition had a miss and 6 months later check engine light on bad coil pack my mechanic C/O and we pick it up i drive it 3 days and miss is back on way to his shop check engine light another coil pack by the time we were done we changed 4 coil packs and 8 plugs and total cost 480.00. she thought that was high and i told her the coils are 50.00 ea. and that three of the ones we replaced have 230000 miles on them so 4 coils in 230000 on a 1997 car not bad

Man, we do coil packs on those trucks all the time. We always try to get the customer to buy all 8 because they are notorious, but usually (and understandably) they do just the bad one or two. Then we see them again and make the same offer. By the third time, they usually replace all the rest. It's worse when the plug blows out of the Triton motors and takes the threads and the coil with it.