ACE-Misfire-detective-kit-with-Pico Scope-3223-PP337-Pico-PP337-With-ACE-Misfire-Detective-you-can-instantly-identify-misfiring-cylinders-without-complicated-equipment-or-diagnostic-procedures-BR-BR-BR-ACE-uses-a-Pico-automotive-oscilloscope-Pico Scope-3223-to-identify-the-high-pressure-pulse-of-the-exhaust-stroke-of-a-misfiring-cylinder-driven-by-the-unconsumed-oxygen-of-a-misfire-ACE-can-also-sense-the-high-frequency-dip-in-voltage-of-an-oxygen-sensor-signal-when-a-cylinder-partial