Hey guys and gals. Been plagued by an issue for a bit. On first start up, I'll let the truck warm up for a few minutes before driving. As soon as I start driving, the truck will spit and sputter for a few seconds then be fine for the rest of my trip. Get to where I'm going, shut the truck off, restart to go somewhere else, the problem repeats. It seems that the fault resets itself once the truck is shut off. Stock engine. Only mods r high flow bassani mid pipe and magnaflow muffler. Tune by JJ. the truck has the same problem whether I'm running JJ tune or on the stock tune. Things I've done: checked all coil packs (all seem fine), put brand new plugs (problem occurred with old plugs too. Old plugs only had 2,000 miles on them), new motorcraft tps sensor adjusted to .98v, new fuel filter, cleaned the MAF, cleaned the inter cooler, just replaced the fuel pumps (problem occurred with the old fuel pumps as well), all new Bosch o2 sensors. It has me stumped. Thanks for the input.