Teaching Yourself Series. A Study On Secondary Ignition Waveforms

[@SuperMarioDiagnostics]

Always enjoy watching your videos! Thank you for sharing!

[@REPOOCNITSUJ]

Great video!! I know you're busy, but if you ever need another topic to cover, I would love to see an in depth explanation (like this video) of pull up and pull down circuits. Thanks for all the great videos!

[@jkbrown5496]

The oscillations are in their way a resistance. They are the result of the interactions between the primary and secondary coils. When the secondary is open as it is during the dwell period and after flame out, the current flow oscillates until the voltage is equal all along the wire as the primary and secondary interact. As seen this takes microseconds. In any case, it is as indicated in the video, an indication of a "weak coil" or more specifically the interaction between the primary and secondary is not as it should be and thus, a likely bad coil.

[@Z14kt12timandjes1]

This is an excellent video! I really appreciate your teaching. I am pausing and taking a lot of notes. One question I have is regarding the point where the spark KV intersects with the firing kV line. I understand that the burn line sloping upward would indicate lean and sloping downward would indicate rich. But what about the height of the sparkline itself? If it intersected with the kV line high up on the kV line, what would that be telling me? And if the sparkline intersected with the kV line low on the kV line, what would that be telling me? Thanks again so much for your excellent teaching.

[@SmittySmithsonite]

AAA+++ on this one! NICELY DONE!! 👍👍

[@robertfrancisco1193]

question; can you get good waveform from a labscope @ WOT . i would think some primary and secondary faults can show up @ higher RPM

[@alexmessina7652]

Excellent. Thanks for the step by step explanation. At 17.20 you say resistance goes down at the end of the Spark Line: I think you mean it goes up?

[@yanleb1]

Great explanations. But @1:50 to the question " What is ecectromagnetism? " The answer is: It's a typo!

[@fire7765]

If there was a mechanics hall of fame you would absolutely be in it

[@spelunkerd]

As you say, you need to gain practical experience by seeing a whole range of normal studies before one can really interpret variance. I was puzzled by the example showed at 22:18, where poor compression led to a higher firing voltage (I guess this one didn't read the textbooks). Thanks for going through this, Dwayne, we're looking forward to the next video. I've found interpreting secondary waveforms with newer ignition systems much harder....

[@bartscave]

Now I know why you wanted my comments! I have been an EMT as well as a tech for 40 years. I give paramedic and nursing instructors automotive scope screen shots to test their students medical knowledge. It's amusing how many answers they get. Like you say, they can be similar. "No, it's not V-fib sir, it's a shorted plug wire on a 1974 ford pinto...."

[@realfixesrealfast]

That's so funny, but so true. I was hoping you would understand what I was getting at. Thanks for your comments

[@ozzstars_cars]

I've learned a lot here on KZbin. Thank you Duane for the solid info you always provide!

[@Zib187]

Great video Duane! It was very informative.

[@petar443]

At 22:18 , cyl number 6 slope line is going up, based on info from 16:40 this means voltage demand is going up because of increased cylinder resistance. Is it the low compression on this cyl that is the increased resistence?

[@strokewarrior5762]

yes, low compression directly affects the resistance

[@neverstoplearning382]

Thank you! For sharing important information. All the best. Always.

[@mervyn567]

Thank you Duane . Looking forward to the next video.

[@burtpilon1735]

Outstanding teaching video thank you sir take care

[@billyyoder8171]

Thank you Duane. Great job. Really appreciate your videos. Bless you and your family.

[@juergenscholl2843]

Thank you for your time and dedication.

[@AutoDiagnosticsPK]

Simply hats off Sir۔۔۔۔۔the most thorough and precise content one can find in texts، youtube or else where

[@tgoodm1]

Another solid video...Keep it up!!!

[@scaracci24]

This was excellent!, great expalanation and description on a confusing subject.

[@HaroonKhan-qc7nm]

Definitely going to watch this video. Battery nearly dead

[@autorepairbymike1356]

Can you share the text and graphics in a format that we can refer to?

[@ysnphotos]

#ysnphotos_le_gustó_tu_publicación

[@ysnphotos]

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[@ysnphotos]

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[@timgroleau1612]

Well done.

[@magid5441]

Millions like Simple and easy to understand

[@harhar4607]

Hi Excellent presentation, clear,concise & an exceptional training video. Kind regards

[@markferraro5250]

excellent presentation thank you

[@stevenkietzke5582]

Been a tech for years but seems like I always learn something new in your channel Thanks

[@antonozavala8139]

Gracias marcos

[@hassanissa9741]

Great jop