I've had misfire issue with this truck for a while now (2000 F150), I would get one or two codes for misfire then drove it for a week or so and the codes would just disappear and truck would run decent for another couple of weeks. This has been going on and off for half a year and still can't find a problem.

I brought it in a couple of times with no luck, they couldn't find anything the first time and the second time they just changed the spark plugs. I just changed the fuel filter and ordered some coils online but other than that this is still a mystery to me.