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Misfire Quick Tests (Is it a spark, fuel or compression problem?)

2007 Dodge Caravan/Chrysler Town and Country 3.8L with a misfire. In this video I will walk you through some simple tests to help you isolate the cause. Even if you do not have a lab scope, the cranking sound test I show, will help you determine if you have a compression problem or not. Tests shown: how to perform a cylinder drop (RPM drop) test using a test light how to perform a cranking compression sound test how to perform a relative compression test with a scope how to determine which cylinder has low compression on a starter current waveform (how to sync a relative compression test waveform) Tools used OTC 3633 Mini Circuit Tester https://www.jbtoolsales.com/otc-3633-... PicoScope 4425 4 Channel Standard Diagnostic Kit https://www.aeswave.com/cart.php?m=af... Related videos Cranking compression sound and scope test    • Cranking compression sound and scope ...   How to perform a compression test with a scope (Picoscope)    • How to perform a compression test wit...   How to perform a compression test with a scope (Verus-Vantage)    • How to perform a compression test wit...   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.