Sierra 18-9903 Engine Ignition AnalyzerUse the Sierra 18-9903 Engine Ignition Analyzer for diagnosis & performance measurement of all types of spark ignition systems.Troubleshoot: Non-Starts, Misfires, Intermittent problems, damaged spark plug wiresTroubleshoot: Fouled or damaged spark plugs, primary & secondary coil circuit faultsFeatures: Display waveforms in real time; Detect & display dwell angle and ramp time; Graph burn time, spark plug voltage, dwell/ramp time, & RPM for each spark; Compare readings between cylinders w/ a candlestick graph that displays max, min & avg for each cyl.; 3.5" color TRT LCD screen; Rechargeable Li-Ion battery provides 6+ hours of working time; Passes the rigorous "MIL-STD-810" drop test; Includes: Analyzer; Flexible probe; Coil on plug pickup; Spark plug wire pickup; USB cable & AC charger adapter; Protective rubber holster; Hard padded carry/storage case; User's Manual;