Bill Fulton is the author of Mitchell 1's Advanced Engine Performance Diagnostics and Advanced Engine Diagnostics manuals. He is also the author of several lab scope and drivability manuals such as Ford, Toyota, GM and Chrysler OBD I and OBD II systems, fuel system testing, many other training manuals in addition to his own 101 Lab Scope Testing Tips. He is a certified Master Technician with over 30 years of training and R&D experience. He was rated in the top three nationally on Motor Service magazine's Top Technical Trainer Award and has instructed for Mitchell 1, Precision Tune, OTC, O'Reilly Auto Parts, BWD, JD Byrider, Snap-on Vetronix and Standard Ignition programs. You may have also seen Fulton in many Lightning Bolt Training videos and DVDs and read his articles in many auto service magazines. He currently owns and operates Ohio Automotive Technology, which is an automotive repair and research development center.
We are going to cover the diagnostic value of scope-checking the primary side of the ignition system on a voltage trace and by using a low inductive amp probe to monitor coil charge values and analyze ignition events.
You have certainly heard the phrase that “a picture is worth a thousand words of information.” That especially is true on lab scope waveforms from both sides of the ignition system as well as input sensors and output devices.