you say you tried switching the coil wires?
If your one pulse generator is working then
it should spark the suspect coil if the coil is okay.
If you can't get the right coil to spark
then it might be faulty. If hooking the good
side pulse generator to it fails then the
coil is no good. Once the coil is eliminated
then check the pulse gen yellow and white for
small voltage pulse. Probably either the coil
or pulse gen if you have voltage to the coils.
(Pulse gen ohms = 330)
Coil primary is 2.7 ohms, about 20k secondary.
Let me know if you need any info.