1990 Camaro 305 v8 tbi. The original ignition coil failed after 30 years. I replaced it with a brand new delco one I got online. Worked fine for about 5 months,then I got a rough idle,and it bucks/misses when accelerating. Lifted the hood,heard zapping,found the problem,it was sparking from the base of the ignition coil electrode shaft across to the metal transformer looking section of the coil itself.
I tried putting brand on a brand new spark plug wire,still the same issue exists. I’ve ordered a replacement coil and am now waiting for it to arrive,but I am amazed at having a coil fail this way and so quickly out of the box. This was a brand new ac delco coil,in its original box.

Has anyone else had this issue before or seen one of the coils fail this way? The spark is not coming from the metal part of the electrode,it appears to be coming from the base of the electrode where it’s coated in plastic and then jumping directly across to the metal center core of the coil itself.

 

Nevermind