Ive tested them with my multimeter and not sure what readings are acceptable. I cut on my multimeter ( analog) and touch the probes together and then adjust my zero. Then I take the red probe and stick it into the kill switch wire, and then the black probe and stick it to where the condenser wire would hook up and I get a zero ohms reading. Then I hook up the red probe to the Spark plug wire ( cap removed) and the black probe to the non condenser side wire ( kill switch wire) and it reads at about 10000 ohms. Ive heard some people say that they test their coils and get a reading close to 3 ohms ( x 1000 ) is the 3 ohms reading im supposed to get for the first test that I do or what. Any insight would be great... if not then I have to spend 110 dollars on some dynatech coils. thanks .... My first post.