Dave
Testing coils can be very problematic. The 1/4 to 1/5 volt most meters use for resistance testing will not arc nearly as easily as the 25,000 volts produced in the coils secondary. Or for that matter as much as the 12 volts from the battery. So here is my rule. if the ohm meter test the coli as bad it is bad. If a coil tests good with an ohm meter then MAYBE it is good and MAYBE not.
Mike