I have a #6 cylinder misfire it's not plugs wires or coil what could it be

No mention of changing the spark plug(s)? How were the wires and coils checked,can't assume they (seem) ok (must test). have you swapped #6 coil with another cylinder to see if the misfire follows that coil? same with the #6 wire? got injector pulse on #6 injector?