The ignition waveform is a window, through which we can see what happened in the engine combustion chambers. It determines whether the ignition plug needs to be replaced or clean. Does fuel injector in electronic fuel injection system wok well? Is there any problem in the leakproofness of air cylinder? Does the gap between ignition plugs get larger? Does the electrode shape of ignition plug become sharp? Is there too much oil pollution or carbon deposition on the ignition plugs? Does the insulating property of ignition plug get worse? Is there any problem in the power supply system of storage battery?

       The use of  HT25COP coil-on-plug and signal probe is to measure the igition waveform of automobile engine fastly and correctly.