I have a Job1 08 with97K on it, Love the truck and have had no issues with it. I have a Spartan programmer with the dpf delete on it. Last weekend while at the store, wife is in the truck and idling it for the AC, then it starts to rattle and idle rough. She shuts it off, restarts it, runs great. Next day I let it idle for 3 - 4 mins and the same thing happens. It runs great as long as I don't let it idle too long. Other than that it runs great! Any suggestions? I hear horror stories of injectors going bad and taking out engines, but I would reason that if an injector was going bad, it would do it all the time, any thougths would be appreciated.