Symptoms of a bad knock sensor
Traderjoe,
Have you turned up anything with the knock sensor? I have done the almost exact same thing with my 4.9 (even taking out the fuel injectors and cleaning them manually) but it still has the misfire. My engine was really junky on the inside of the intake manifold and I assume the head as well but I didn't take the engine down that far.
Anyway, did cleaning or replacing the knock sensor help?