A good way to identify if your condensor is stuffed is to check the contact sufrace of the breaker points. If it is a light smokey grey then it is all good. If it is a bluish colour then the condensor is crook. Also check that the points are correctly gapped at 18thou or 0.45mm. Also with new points there is a coating on the contact face that requires rubbing off prior to fitment (clipping the points on your T shirt and a quick rub does the trick) and a little bit of high temp grease where the rubbing block runs on the dizzy lobe goes a long way to the longevity of the points. Other than that not much else can go wrong with a dist or coil. It always pays to make sure your dist has 12V going to it. The coil may never have been at fault.