So my old girl keeps having a problem of misfiring after sitting for 3-4 days. The truck doesn't lose power but it just runs like crap. A flashing DTC for the misfire goes and then once the truck warms up a bit she runs great with 0 problems and the flashing stops. I read the code and it says theres a cylinder 2 misfire. i'm not sure whats causing the problem since if the truck is started every day she has no issues. I would love some advice on this so I can get it fixed up.