Primary coil resistance should be between 1.87 and 2.25 across the low tension circuit and the secondary including the lead is 12-18 k ohms, resistance for a cap is 10 ohms.
You'll more than likely find the issue is the plug lead either where in goes into the cap or coil, both can be trimmed back, that said it's possible that's already been done and you may need new leads. It's also possible a/the cap/s have failed.
