GM Bypass Ignition System Operation (part 1)

Part 2    • GM 3300 Intermittent no start rough idle (...   This is a unique design when it comes to ignition systems. One where the ignition module can control spark completely independent from the engine computer and is something GM used for many years. Starting with their computer controlled distributor ignition systems in the early 80s and continuing in many different waste spark designs well into the late 90s. The engine being discussed is an older GM 3300 but the material can be applied to all GM bypass ignition systems. This lecture was given to my class in connection with the following case study: GM 3300 Intermittent no start rough idle (shorted injectors)    • GM 3300 Intermittent no start rough idle (...   Related videos How to test a GM ignition module (crank sensor bypass test) - VRS    • How to test a GM ignition module (crank se...   ScannerDanner gets his butt kicked by an '88 F-150 (EEC-IV Ignition)    • 1988 Ford F150 EEC-IV , No Spark [Good Ign...   Topics discussed How a bad ignition module can cause a no injector pulse condition with good spark. How electronic spark timing works What is the difference between "Module mode" and "EST mode" what the "reference "wire is used for and why you want to remember the wire color how to perform a bypass test on the reference circuit to check for injector pulse Playlist (Chapter 22) No Spark Troubleshooting, Ignition Coil & Module Testing    • (Chapter 22) No Spark Troubleshooting, Ign...   For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book. Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium https://www.scannerdanner.com/join-sc... There is a 14 day free trial. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere! Disclaimer: Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.