The last few days my truck has been acting up with throttle response and being lazy. It is lazy like the tuner isn't working, and then it will liven up all of the sudden and be fine from there on out....until I shut the truck off, and then it starts all over again once I start it back up. Once the laziness goes away, it is fine until I shut the truck off. I was wondering if this is a tuner-related problem, as I haven't had anything like this prior to the past few days. I'm in the Marine Corps and just got back from a 7 month deployment, so the truck didn't get driven much at all over those 7 months, and I don't know if this would have any effect on it either. Any help or areas to check would be appreciated.