I bought an '06 t-dub with 6K miles. The oil's been changed, the spark plug and air filter are clean. It runs kind of rough with the occasional hiccup. It doesn't run hot, no smoke from the muffler, just a little on startup. I had to set the idle a little high to keep it from dying. It had been sitting in a garage for a couple years. Does it just need to be run for awhile? What could I do for her short of going to a mechanic? I was looking at treatments and fuel additives, I almost went with the STP engine treatment, but thought I'd ask here first.