https://stream.echo6.co/videos/watch/52b2e05c-34f4-4d49-a6c7-c04990a72f5b This case study is a great demonstration of some of the many variables that come into play during diagnosis. As we found out, this GM 2.2L engine with a broken timing chain is not only capable of producing spark, but spark at the correct time! I also demonstrate some quick testing methods with simple tools and scan data to point you in the direction of a timing issue. Be sure to check out part two of this case study for more info. Engine Performance Diagnostics chapter 23 Symptoms crank no start (unusual cranking rhythm), spark present, check engine light (P0107, P0141, P0340, P0440, P1621, P0621), Fix repaired the failed timing chain, Tests shown how to test for spark out of a plug wire, how to use carburetor cleaner to check for a fuel delivery problem, how to use scan data to check for a mechanical engine issue, understanding MAP sensor readings and how they relate to mechanical integrity, how to perform a relative compression test with an ignition event synchronized, analyzing a relative compression waveform, comparing ignition timing to compression, how to scope crankshaft position and camshaft position sensor signals, how to check for camshaft rotation by removing the camshaft position sensor, Tools used incandescent test light, carburetor cleaner, scan tool, Pico four channel lab scope, high amp probe, ignition sync probe, Playlist (Chapter 23) No Start Diagnostics with good spark and fuel https://www.youtube.com/playlist?list=PLAFYVCyenqcpCTlUCCvqBM71p5n_cuSyL, Related videos How to identify a broken timing chain - GM 2.2 (part 2) https://youtu.be/2SmmLXGpa58, Honda Civic 1.7 (start, run, stall case study) https://youtu.be/i6x31RU1S_I, How to check for a jumped timing chain or belt https://youtu.be/pKic89CIPlM, Jumped timing chain (no compression on 3 cylinders) - GM 3.6 https://youtu.be/Iq27aO-zfgs, Jeep 4.0L timing problems (a ScannerDanner Premium video) https://youtu.be/ed2Z7SOgLuE, 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-scannerdanner-premium.html 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. Fri, 01 May 2026 08:30:23 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/52b2e05c-34f4-4d49-a6c7-c04990a72f5b All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.