Uploaded June 2025 | Updated September 2026, 3 weeks ago

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00:00 - review of fuel trim vs misfiring
00:48 - review of RPM drop test and driver shut-down
03:37 - review of spark plug color/cooling system
04:40 - review of secondary ignition waveforms
07:23 - lean misfire that I missed!
08:03 - internal vacuum leak (V-type engine)
10:20 - concerns of contaminated fuel/sticking injectors
11:07 - clip of unsticking an injector
11:55 - smoke test on the intake (vacuum leak test)
13:33 - picoscope secondary waveforms
16:47 - Snap-on vs Pico (zoom differences)
17:08 - SDP Scope and Scan Tool Classes scannerdanner.com/scannerdanner-premium-chapters/scope-and-scan-tool-classes.html
21:22 - setting a scope trigger
22:15 - flex-fuel Jeep review
youtu.be/glYGv3CyVWU (part 1)
youtu.be/Hjgs_8wX6Ks (part 2)
youtu.be/7kgnwJX40C4 (part 3)
23:50 - suspected sticking injectors (lean misfire waveforms)
25:04 - #2 cylinder lean misfire
25:37 - what's the fix?
28:25 - SD Premium!
scannerdanner.com/scannerdanner-premium-chapters.html















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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at scannerdanner.com as an eBook or paper book.
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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.