How to overlay in-cylinder waveforms - and how peak compression CAN be a false TDC

[@stevenwebb5233]

Thank you for all you do to help others. This is a great video showing us how to overlay. Thank you again

[@CubasAutomotive]

Exceptional! I definitely learned from this. I need to apply these tricks more to make them stick! It's amazing to see your growth as a technician, as a YTer, and teacher. I applaud you Mario! 😍🤗👏👏👍

[@nelsonguido730]

¡Gracias! Mario yo también crei que habia problemas con el lado de escape muy bueno 👍

[@BigDogDiagnostics]

Don't know how I missed this one! Glad I found it though, great video! I sometimes struggle with finding the true top dead center. Can be misleading for sure when looking at those patterns. This was great information, Thanks for passing it on 😎

[@steveanderson4553]

Really good information ! Thank you Mario and Brandon 👍

[@paulpaquette1961]

WOW, this is Awesome! This is very useful to know. A huge thanks to Brandon Steckler, and you Mario, very, very well explained and hands-on! Have an Awesome Safe week Sir!

[@jonathansandefur7672]

Great video. Watching you develop your skills evolve has been an inspiration. Keep the great content coming and thanks for all the time you invest in making them.

[@alexsalazar1356]

Great video! Thanks for you help, we need more videos like this, recognize bad waveforms

[@jeannettecalderon4389]

The quality of this video 👍🏼

[@randygould4109]

so i have used this tool a lot today . works great on cam and crank correlation . another tool in the arsenal. thanks for heads up on this tool

[@edwinbrewer1789]

Great timing on this video. I just confirmed valve timing was off using in cylinder on a 4.7 Chrysler on the LH head. There was no cam sensor on that side. So no code & could not check cam crank sync. Was able to use this to overlay Cylinders #1 from LH side & #8 from RH side. Thanks a bunch!

[@VoltageDropDiagnostics]

I caught bits and pieces of this on facebook! I need to get back and read more into it! Thanks for sharing Mario!

[@petercarvajal1231]

Well Done! I needed to learn this. Thank you

[@PaulysAuto]

Very useful information, thanks for helping us understand how to analyze these waveforms Mario. I definitely would have been in the rabbit hole on the exhaust valve timing for sure! Love you sharing this in depth analysis and I hope you can keep putting out more of these in the future!

[@andrewk778]

A great video. This is why I watch videos. I added this to my watch later file. You are an exceptional talent. Thank you for sharing.

[@DylanRabier]

Awesome! Thanks for taking the time to share this with us. 👍

[@JoelAutomotiveInaction]

Great demonstration , I have a video for toyota corrola where I have shown that with relative compression that was low comprecion acrros the board looks relatively equal but all 4 cylinder low compression, and I did incylinder too , what demonstrates the ig supposedly was out time but was not what was in reality was the compression was built up the max prior the piston travel still was going on to tdc . Thanks for sharing

[@billyyoder8171]

Thank you Mario. Good job. Have a blessed and safe week.

[@High_Tech_Mountain]

Wow! Thank you for sharing Mario. I try to keep up with the case studies but there’s tons of them. GREAT INFORMATION in the video! I thought it was an exhaust valve not opening form the moment I saw it (which I was wrong,lol) again thanks for sharing brother!

[@billmck12345]

wow! first time iv seen a false tdc pressure waveform.... thanks so much Mario!!

[@jamessvetlovics4948]

That is clutch info about TDC on low compression cylinders, great stuff thx for sharing

[@franciscodiez5825]

Another great video! Alot of great info/insight. Thanks for sharing and keep them coming.

[@BrianMann216]

Great job explaining over lays Mario. Keep up the great work and sharing. I would love to hear more on the peak compression not being @ tdc. I will be attending Brandon's full day class at Vision 2020.

[@mechanicmatt871]

Thanks Mario, You are really good at explaining things, thanks for sharing your knowledge,

[@marklennon4988]

Thanks Mario! Great stuff.

[@frankarauz5851]

saludos amigo, realmente admirable, eres gran tecnico...

[@geraldhenke]

Thank you, this makes learning this much better, awesome video

[@brandonsteckler3417]

Thanks Mario❤️

[@SuperMarioDiagnostics]

No, thank you man!

[@randygould4109]

Great as video as always

[@arthurfricchione8119]

Mario thanks for sharing. Will definitely down load that program or app whatever. Thanks again Artie ❤️

[@richardcranium5839]

that was super mario im saving it to watch again

[@shaunsautorepairs5410]

very interesting...havent seen that before...thanks for the clear explanation.

[@2secondslater]

Great vid mate, peak compression should not be used for measuring TDC, it is variable and dependent on many factors including engine condition. Just as an example because it stands out more in most cases on diesels, peak compression in diesel engines can occur well after TDC occurs and is usually set to occur at a favourable connecting rod angle to transfer the peak compression force. Using a "fixed" reference point for TDC such as a crank or cam angle signal is always advisable. I tend not to use ignition or injectors on petrol (gasoline) engines as these signals can be variable too.

[@k20chad]

That is awesome! Thank you for sharing this. Would you be able to post the PS files so I can play with them?

[@SuperMarioDiagnostics]

I'll let you know when i post them, might be tomorrow

[@k20chad]

@@SuperMarioDiagnostics Awesome! I appreciate it very much and thank you :)

[@SuperMarioDiagnostics]

here ya go: drive.google.com/open?id=18nGh19T3CLAs5Jj1Jabx9qFJtzoRUTFH

[@k20chad]

Super Mario Diagnostics Thank you sir :)

[@luisfranciscocopca3641]

Excelente video y gracias por la traducción

[@alexlongpre4527]

Thanks a ton for this Mario! I'm currently building my first transducer to experiment with it, so all of what you talked about in this vid will probably save me a ton of headache. It compliments well what I've learned in Brandon Steckler's and John Morton's videos. Now I have a question. Even on y known good waveform, you don't seem to have a drop to vacuum when the intake valve opens... Was this a cranking compression waveform by any chance? Thanks and cheers from Canada.

[@SuperMarioDiagnostics]

That's correct, these are cranking waveforms. Rpm isn't fast enough to produce a pronounced vacuum between the throttle blade and the intake valves

[@alexlongpre4527]

@@SuperMarioDiagnostics Great! Thanks for the reply and for confirming that I'm getting the hang of this. Even though I don't have a transducer yet, I try to watch as many videos as often as possible to still train my brain into interpreting the squiddly lines and filter the right info out of them. Thanks again for everything you do.

[@SuperMarioDiagnostics]

That's the best way, and what i did before i got my own equipment. Check out Dave decourcey in KZbin, he has a great video you definitely will love

[@alexlongpre4527]

@@SuperMarioDiagnostics Thanks for the pointer, I'll definitely have a look at lunch brake. Cheers me lad.

[@GoodGuysSmogSanBernardino]

I wonder if you have any experience about pressure waveform overlays on snap on verus edge? thanks George.

[@IAMNOSLEEP]

Great video. Thanks for sharing. Cheers.

[@PauloRogerioHantekNaVeia]

muito bom,foi util sim pra mim que estou usando o picoscope conprei a poucos dias, estou usando o mpx 5700 mas ele corta o pico porque só mede 7bar. teria algum pra indicar? e ensinar como fazer uma sonda personalizada pra ele?

[@SuperMarioDiagnostics]

Pelo que posso ver nas especificações técnicas desse sensor, o problema é que ele tem um alcance de apenas 100psi. o próprio sensor está causando o corte e interromper uma sonda personalizada não solucionará o problema, infelizmente. você precisará de um sensor capaz de ler a pressão do cilindro, que pode chegar a 250 psi em alguns casos Eu espero que isso ajude.

[@PauloRogerioHantekNaVeia]

@@SuperMarioDiagnostics , poderia indicar um ? obrigado pelo retorno 🤝🤝

[@SuperMarioDiagnostics]

o estilo mais antigo FLUKE PV350. ele precisa ter uma pequena caixa azul na placa de circuito para que funcione bem com o escopo. os novos não funcionam bem com escopos. você pode encontrá-los usados ​​no eBay. de nada amigo

[@simonhawkins2597]

Hi Mario could you please post the link for the video on reference waveforms by trained by techs?? Great video as usual👍👍👍

[@SuperMarioDiagnostics]

kzbin.info/www/bejne/Z6G9fJmJbrOpgK8

[@simonhawkins2597]

Super Mario Diagnostics cheers Mario thank you for sharing 👍👍👌

[@jameswasher3938]

Thanks Mario. Nice video. I've just used photo editing software to allow me to stitch and move 'layers' for this kind of overlay work.

[@caliautotech21]

Def gonna use that! Thanks for the video.. was the case study for Andrew and Brandon posted anywhere ?

[@SuperMarioDiagnostics]

Yes I'll tag you

[@JOHNPHUFNAGEL]

Great video Mario!! I am a novice scope user and always trying to learn something new, I might have missed your explanation but what was wrong with the low compression cylinder? If you cant line up peak compression how would you determine if valve timing is off?

[@SuperMarioDiagnostics]

This cylinder had a scored wall. Think about it this way, if you find that on one dohc engine cylinder it appears to have a timing issue on both the intake and exhaust cam, equally, it's likely impossible. So you match them up according to valve activity instead of tdc

[@shamessun]

thank you and thank you brandon

[@andysgarage6612]

Thank you, thank you 😊

[@naushadali95]

Super video.thanks

[@DmitriyL_Arithmechanics]

Great video, Mario! The proverbial leaning towers that skew the whole waveform... Do you endorse always including the ignition sync while capturing pressure waveforms? Now a fun question: why the expansion void for a bad cylinder is not deeper than the one for the "known OK" cylinder?

[@SuperMarioDiagnostics]

I don't always do it, since every car is different in their spark timing strategy. But it doesn't hurt either. My best guess would be that there isn't enough sealing capabilities to cause a vacuum in the expansion void. It's allowing air to enter the cylinder too fast for the vacuum to happen. Thanks for watching buddy

[@DmitriyL_Arithmechanics]

@@SuperMarioDiagnostics Good explanation. This example is so extreme it breaks all kinds of rules of thumb.

[@twinnumbr1168]

Great information. 😎

[@planet1250]

Thank you Mario !

[@markjohnson8162]

How do you upload your pictures into the pressure overlay ?

[@SuperMarioDiagnostics]

Editing software

[@markjohnson8162]

@@SuperMarioDiagnostics I don’t understand what your saying brother ?

[@markjohnson8162]

@@SuperMarioDiagnostics do you mean download editing software ?

[@david619dc]

Way easier that reference waveform. Thanks

[@diymisfit_Mechanic_UDX404]

Good stuff right there. 👍

[@HayabusaRydr]

Best to use a sync to line up waveforms perfectly

[@SuperMarioDiagnostics]

What sync would you use?

[@steveanderson4553]

Good Stuff !!

[@carguy1312]

Fyi - need to either snip, or save files as "png" image from pico when using the overlay program.

[@chrisduran8692]

Is the overlay app compatible with Zeus by chance? I was having difficulty installing it today but im sure it being snap on there is some small detail im missing that doesnt allow for download and install?

[@SuperMarioDiagnostics]

I'm not sure, i don't use a Zeus

[@chrisduran8692]

@@SuperMarioDiagnostics definitely further investigation required on my part and I appreciate the response! Love the content man you have great work!

[@SuperMarioDiagnostics]

Thanks! I hear is a Windows 10 platform so it should not be a problem

[@davesterl]

Super vid super mario

[@raysolis6553]

Nice!

[@phillipzan2005]

Mind blown....

[@ismarmeskovic]

👍👍👍

[@venturafredis]

hola mario quetal aga porfa en español para los que no hablamos o entendemos el idioma ingles muchas gracias super mario

[@JoelAutomotiveInaction]

Yo hago vídeos en los 2 idiomas pero créeme es bastante trabajo solo hacerlo en una lengua y en 2 mucho más

[@CubasAutomotive]

@@JoelAutomotiveInaction 100%! 😥😥

[@SuperMarioDiagnostics]

En serio, no es solamente creando vídeos en español, pero también respondiendo cada pregunta. Uno no se imagina el tiempo que se toma para hacer todo eso. Por el momento, puedo responder comentarios, pero no se si voy a empezar a hacer vídeos en español

[@jhauna1]

First here😁