This Waveform Overlay tool lets you leverage the diagnostic information from your scope captures, allowing you to chart the 4-stroke engine combustion cycle and overlay and compare multiple images. TaT members can download the software at www.tat.net.au/scandata/downloads.php If you’re not a member join up at www.tat.net.au/social.html and get instant access. Capricorn Society | The Automotive Technician