Misfire cylinder three and code P0303

Changed plugs, cap and rotor and new distributor. Truck starts but still has miss in cylinder three. Coil changed, no change in misfire. Lean code p0303 still persists. Pulled number 3 spark plug wire off distributor, no change in engine. I popped the fuel rail and got good fuel pressure. Engine starts fine and has no power, just a misfire that I cannot find source of. No vacuum leaks. Like I said, pull number 3 wire and no change in engine. It is not getting spark only on that cylinder. Is it cam position or crank position sensor, PCM?