DE Nichols· Registered
Why would your coils be expensive to check? I have light bulb lit spark testers...but they take exeperience to know how bright a light bulb should be. I also have a grounding based one where you can set the gap it should jump. 3/4" is a tough gap but a great coil will do it, but if I don't get spark until like a 1/4" then I say the coil must be bad.