2000 Mercury Villager-Nissan Quest Misfire - is it spark, fuel or compression

As with any misfire, you have to think about spark, fuel and compression. I will walk you through some quick tests on verifying all three, before narrowing in on a faulty fuel injector. The tests shown in this video are universal in nature and can be applied to any car. ScannerDanner tools: https://www.amazon.com/shop/scannerdanner https://www.scannerdanner.com/tools.html Video breakdown: - :38 trouble codes P0302, P0325 - 1:25 cylinder drop test (RPM drop test) using a test light - 3:10 how far of a gap should spark jump from a coil or wire? - 4:45 initial cranking sound test to verify good compression - 5:25 other relative compression (cranking compression) videos I ve done: https://www.youtube.com/watch?v=pOghpmVhVng https://www.youtube.com/watch?v=WKdZsWU2ZmI - 6:00 beginning of fuel injector tests - 6:10 (video mention) How to test a fuel injector (open winding) Nissan https://www.youtube.com/watch?v=mmRhcVkJdeQ - 8:31 video to help you understand what a "trigger" setting is used for on a scope https://www.youtube.com/watch?v=81AGbZcgCZs - 10:00 good and bad injector voltage waveform - 11:17 video to help you understand fuel injector patterns and what to look for "How to interpret fuel injector waveforms (a free ScannerDanner Premium video)" https://www.youtube.com/watch?v=4mut0Lpg5k4 - 14:19 (video mention) Nissan Quest open injector (2nd mention) https://www.youtube.com/watch?v=mmRhcVkJdeQ - 16:45 (video mention) Stuck Open Fuel Injector (how to fix) https://www.youtube.com/watch?v=NXrd1fYwj1o - 18:47 uScope (single channel, inexpensive lab scope) https://goo.gl/1CHxQC - 20:58 (video mention) Lexus fuel injector failing when hot, misfire (fixed with snow) https://www.youtube.com/watch?v=b8ww7lMMpZ8 - 21:51 uTest Advanced Terminal Kit https://goo.gl/fPVhJs - 23:34 resistance of bad injector compared to known good - 27:30 amperage measurements (low amp probe/scope) - 30:46 cranking compression sound test (good and bad) 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.