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 😎
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! 😍🤗👏👏👍
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!
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!
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.
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
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!
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!
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.
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.
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?
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
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 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.
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?
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
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?
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.
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
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?
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
