A spark tester will let you know if the coil is going, puts more of a load on the coil cause it has to jump a further gap, use one at work to test cars, motorcycles, lawnmowers.If it sparks good, coil is good, cold. When I test one, I want it got also for a second testing bot to see if it fails. Cheaper than throwing a coil at it and you can always use a spark tester.
Steve, Samsung On5 using Tapatalk
Steve, Samsung On5 using Tapatalk