4 bad coil packs at once?
my '05 F-150 with 4.6 L started running rough and check engine lite came on. ran the truck for about 80 miles after this happened, no choice. had the codes pulled at autozone and they told me they read as follows: cylinder 3 misfire, coil pack A bad, coil pack F bad, coil pack G bad, and coil pack H bad. would 4 coil packs go bad at the same time, or is there another problem causing this? if anyone could tell me which coil packs these are it would help a lot. also wondering if there is a way to check the coil pack with an ohmmeter? thanks for the help.