Truck has always ran great. Stopped at the store one night and shut it off, when I started it back up it was missing really bad. I started removing plug wires one at a time and found that when number 2 was unplugged, it ran better. Ive replaced the plugs, wires, fuel pump and filter, cpi unit, fuel pressure regulator, and TPS. Nothing has helped it or hurt it. The cap and rotor arent even a year old. Could be something as simple as the cap or rotor? What about the distributor itself? Thanks!