So found a thread with a rather informative demo by dave showing how to check the coils. Both of mine read very similar.
The good coil reads 0.6 / 8.35 (@ 20k)
The bad coil reads 0.6 / 7.54 (@ 20k)
So I'm guessing if one was fooked, one of those would read way out.
Now, one of the terminals on loom to the front cyl, is 3/4 stuffed, but runs no prob with the good coil. I though that might of been the problem, but it appears not.
The terminals on the front coil are also pretty tired looking, and the terminals on the back cyl coil are very good, so next on the check list is cleaning the terminals on the dodgy coil and seeing if it improves.
_________________
Winning isn't everything, but loosing isn't anything