Ignitor, limiter, coil?
 

I have a 94 Club Car. After reading many threads about intermittent and/or no spark I have: replaced plug, replaced ignitor and tested limiter by removing ground. It seemed like I had made headway after replacing ignitor and un grounding limiter but the cart was running sluggish and backfiring a lot. I got it back to the barn and then the spark was gone. Should I replace the coil and if so any tips on "how to"?