Sounds like the wires are OK, especially as all 6 read the same. The resistances are used to reduce interference to radios.
If everything is soaked in oil thenth oil might have broken down (in the electrical sense) and the spark might be tracking across a carbonised portion - might not be visible.
Best to clean the oil off everything (before it kills your coilpacks), including the wires (try some sort of solvent for this) and try again.