Waveform Analyzation Breakdown When AFM Lifter Fails

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DTech Engineering

DTech Engineering

Күн бұрын

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@saibabupodala6297
@saibabupodala6297 Жыл бұрын
I'm never see this much analysis without opening engine it's very good diagnosis we know everything INSIDE engine without opening with scope thanks to share your knowledge
@Sergio09354
@Sergio09354 2 жыл бұрын
Hi New subscriber here from california. found your channel by accident. excellent work with the scope thanx for sharing your wisdom with us spent hours watching your videos. keep up the good work!
@DTEAuto
@DTEAuto 2 жыл бұрын
I certainly am glad you found the channel, and glad to hear you are enjoying the content and last but not least, thank you for watching
@advancedleveldiagnostics
@advancedleveldiagnostics 2 жыл бұрын
Terrific Video! Thank you for taking the time to share!
@DTEAuto
@DTEAuto 2 жыл бұрын
Thank you for watching!
@djosbun
@djosbun 2 жыл бұрын
Great scope work, Sadel. Believe me when I say that your videos are never boring and we appreciate you taking the time to record your work and uploading it for us to learn from. A+++ as always, brother.
@DTEAuto
@DTEAuto 2 жыл бұрын
Thank you, I'm glad they are insightful. Thank you for watching
@davesterl
@davesterl 2 жыл бұрын
Great detail of evidence based diagnosis. I've made a few leads to use the chassis ears on the pico so i must do a bit of experimenting and post a video of it. Thanks
@DTEAuto
@DTEAuto 2 жыл бұрын
Thanks Dave as always, I hope you get your leads going soon, they definitely open up some good diagnostic avenues, thank you for watching.
@1hlyGOD
@1hlyGOD Жыл бұрын
Don't know how I have never seen your channel, but I must say ! This is a great video love your explanation and methods of testing. Definitely got a new subscriber. Also you put another reason in head to upgrade my Pico to 8 channels.
@DTEAuto
@DTEAuto Жыл бұрын
Thank you for subbing, I appreciate that a ton! There's plenty of info filled content on the channel so feel free to watch the rest and share with others. I absolutely love my 8 channel pico!
@JoelAutomotiveInaction
@JoelAutomotiveInaction 2 жыл бұрын
Nice work as always 👏👏
@DTEAuto
@DTEAuto 2 жыл бұрын
Thanks again!
@neverstoplearning382
@neverstoplearning382 2 жыл бұрын
Thanks again for this great explanation.
@DTEAuto
@DTEAuto 2 жыл бұрын
thank you for watching as always
@dylanmorse4904
@dylanmorse4904 2 жыл бұрын
Good stuff Sadel!
@DTEAuto
@DTEAuto 2 жыл бұрын
Thanks Dylan, and thank you for watching!
@gcmd5852
@gcmd5852 Жыл бұрын
I wonder how a transducer capture in the intake would look while on a road test if and when you had an intermittent intake lifter issue.
@DTEAuto
@DTEAuto Жыл бұрын
I'd assume it would show some sort of anomaly, I'll have to keep that in mind for when I have another one.
@gcmd5852
@gcmd5852 Жыл бұрын
@@DTEAuto Been kicking around that idea for a while. It might be useful to rule out an intermittent unlatching lifter causing random misfires on those. Might have to invest in a transducer ( Pulse sensor would look pretty crazy ).
@matthewmiller9855
@matthewmiller9855 Жыл бұрын
Excellent video. Love your channel. If you have time to answer a question. How can you tell that the problem is in the lifter and not the cam lobe, without taking the the head off? Just experience? Or do the waveforms show that the lifter is at fault and not the camshaft?
@DTEAuto
@DTEAuto Жыл бұрын
Hey Matthew, that is an excellent question. I've asked myself that in the past and thought I had come up with some sort of hypothesis, but I haven't been able to remember. I think that a lot would have to do with the style or type of set up for the valvetrain the engine has that you are testing. This one obviously has pushrod style, but others with overhead cams, and different valve actuation types can maybe be deciphered differently. It is a subject that I hope to run into down the line that maybe I'll be able to experiment with and will definitely share here. This one, my thoughts were that yes most likely will be a lifter but if one was curious on the cam lobe status, the lifter would need removed anyways.... so, once it is determined that there is mechanical issue with the scope and pertaining to one specific valve control, then you get the chance to inspect both the lifter and lobe. I know it's not the best answer, but maybe I'll be able to experiment this theory at a later time. Thank you for the support and watching.
@matthewmiller9855
@matthewmiller9855 Жыл бұрын
@@DTEAuto Thanks so much for the positive response. You're a true professional. You have a way of explaining things that I really learn from.
@TomTom-ql8lz
@TomTom-ql8lz 2 жыл бұрын
Hey D-Tech, as always you did a great job of diagnosing the vehicle and at the same time explain what’s going on! You’re awesome! I only got one question: what do you mean with microphones to pick up noise of the engine? Do you use the cables and the clamps from the chassis ear and adapted those to the scope? How did you adapt those to the scope? Thanks in advance, greetings Tom
@DTEAuto
@DTEAuto 2 жыл бұрын
Thank you Tom, and yes I use the wired chassis ear leads but connect them with an adapter set that I provide. It makes it easy to use and capture noises on the scope, there's other videos that I show the use of the noise capturing , Thank you for watching
@TomTom-ql8lz
@TomTom-ql8lz 2 жыл бұрын
@@DTEAuto thank you for your answer! What Adapter lead is it exactly? Or can you provide a link where I can buy it or did you build it yourself? Greetings Tom
@DTEAuto
@DTEAuto 2 жыл бұрын
contact me at DTEAuto@gmail.com
@octaviocarrillo5954
@octaviocarrillo5954 2 жыл бұрын
Great work! I am learning a lot from your videos. May I ask, what pressure sensors do you use? For both pressure and vacuum.
@DTEAuto
@DTEAuto 2 жыл бұрын
Thank you, and they are sensors I had made for me specifically, the purpose is to test them good and hard and make them available for purchase in the near future.
@northpostman
@northpostman 2 жыл бұрын
Wow Sadel, another fantastic video. You really do a great job analyzing these pressure waveforms. Nothing boring about this video. Is most of your knowledge of pressure analysis through trial and error, or have you had formal training analyzing these waveforms? If it's formal training, where did you learn this??
@DTEAuto
@DTEAuto 2 жыл бұрын
Thanks a lot for that. And to answer your question, most of what I have learned, I learned on my own from me going over captures of cars that I would practice with. But that doesn't mean I magically learned from nothing. I would scour the internet, just like you I would assume, and try to pick up videos and articles over and over as much as I could and read or watch multiple times over. And as far as "formal" training, nothing that is hidden from the public, Brandon Steckler has good content on this, so does John Thornton and then you have Bernie as well. I took information from those courses and then applied it to practicing what I thought I learned. I say it that way because even taking a course like those, it still didn't fully "click" in me until I went on my own and put the time and effort to take captures and analyze them. It took a ton of hours, ton of captures and many more hours of lonely quite nights in front of a laptop looking a waveform and trying to make sense out of it from what you learned and trying to rationalize in your head what physically is going on and how to tie it in with the pressure changes. It was a lot of time put towards learning it. And I'm still learning till this day. This video is a true example of how I learned on my own. This lifter scenario would never get "scoped" in the real world, it's more of hurry up let's replace lifters and move on... but I, for myself wanted to learn the pressure changes and what they would look like and what they could mean. So, I took a lot of time on my own to take the captures before tearing into this one. And then it was a long time before I truly figured out the waveform meanings of this one. So long story short, put the time and effort on your own and practice lots. No one is gonna learn it for you, only you can feed your brain that knowledge. Sorry for the long-winded explanation. Thank you for watching
@northpostman
@northpostman 2 жыл бұрын
@@DTEAuto Thank you for such an in depth response. I watch videos from the same techs and try to learn as much as I can, but I think that you really break down the analysis in a very methodical way that makes it so much easier to understand. So once again, thank you for the response and thank you for putting out these video's.
@Nostradamus_Order33
@Nostradamus_Order33 2 жыл бұрын
Does the GM 3.6 V6 have any lifter problems?
@DTEAuto
@DTEAuto 2 жыл бұрын
I personally have not experienced any
@Nostradamus_Order33
@Nostradamus_Order33 2 жыл бұрын
@@DTEAuto I have a 3.6 with 90+K miles, drive it like I stole it. No problems yet.
@mayowaodus6310
@mayowaodus6310 2 жыл бұрын
I enjoy every bit of your diagnosis. Did you use the WPS500 for the in cylinder pressure wave form analysis. I see you don’t get to use pressure pulse sensor. Any particular reason for this. I would be staying tuned for the next video. Nice work
@DTEAuto
@DTEAuto 2 жыл бұрын
No, I don't own a wps nor do I use a pulse sensor. I don't like the fact that the pulse sensors have a "flyback" action and swing the voltage "heavy" in opposite direction of an initial big pressure change. My personal opinion is that it makes it more difficult to decipher the waveforms when faults are present. Absolute sensors will capture exactly what pressures are present without a reactive swing in opposite way. Hope this helps and thank you for watching, and just fyi there are other videos I have on channel that go in depth with these pressure waveforms and explanations of them.
@mayowaodus6310
@mayowaodus6310 2 жыл бұрын
@@DTEAuto so what did you use here. Just the scope only?
@DTEAuto
@DTEAuto 2 жыл бұрын
used an absolute -30psi transducer for intake a 100psi absolute transducer for incyl and chassis ear microphones for the noise capture all on pico 8 channel scope
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