Ignition System Testing Made Easy

The Lisle ignition spark testers quickly checks spark at plug wire or coil on plug. It is a handy tool to check ignition spark without removing the spark plug. The ignition spark tester is specially calibrated to measure ignition voltage. Works on both standard and electronic ignition systems. Easy to use, simply adjust calibration screw to proper gap size. Attach spark plug wire or coil to the end of the tester, clamp tester on engine to ground and crank engine to check for spark.