My 03 6.0 started doing something weird recently that I can't figure out. On cold start it will start but immediately dies or has a miss for a couple seconds but will start back up and be fine. If it's started every day it may not do it but if it goes a day without being started it does it for sure. I thought maybe it wasn't getting oil pressure right away but cleaned regulator and replaced valve under oil filter but didn't fix it. Any ideas would be appreciated.