Testing and Verifying Stated Theory

Sadel Owner/Technician Ohio Posted   Latest  
Demonstration
Driveability
2018 Chevrolet Equinox LS 1.5L (V LYX) 6-spd (6T40)
P0300 — Random/Multiple Cylinder Misfire Detected
Rough Idle

To those out here with interest in trying to verify stated theories we make when working on cars…

I wanted to share this one, because it was important for me to be 100% transparent and expose the fact that one of my theorized statements was not what was actually going on with one of the waveforms captured. I could have easily “walked away” and not said anything and not prove out anything and life would move on…. but I did not want to mislead anyone as to thinking incorrect things (even though the statement is a good possibility), especially if I could prove whether the statement was correct or not. along with not just myself having some further testing possibility ideas of proving stuff out after the fact, others too questioned this as well. 

So since I still had the vehicle and was able to conduct further testing, I did. And I found some surprising results , along with getting the chance to “see” some cool effects and results of different scenarios. This has some good detail testing and info along with putting some good theory into practice.

Thank you , and hope this is helpful and clarifies information.

youtube​.​com/watch?v=cZyeuK…

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Glenn Owner/Technician
Texas
Glenn
 

Thanks for the video. There is a lot of difference between theory, hypothesis and studied (proven) facts. We all theorize every day, some are accurate and some are not. It was good of you to go back and analyze this further and gain a better understanding. This fills in a lot of the cause and effect when looking more critical a waveforms. I am by no means a power user of a scope, but every…

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Sadel Owner/Technician
Ohio
Sadel
 

Yes definitely agree for sure on that, I was glad to have gone back to this one and play around with it, I liked the results and outcomes when manipulating the intake waveforms and seeing what can and can't cause changes in it. Was cool to see

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Glenn Owner/Technician
Texas
Glenn
 

Hi Sadel, I learned a phrase in the military years ago when I worked on F-15's in the Air Force. My Flight Chief, always coined the phrase : “If in doubt, check it out”. Basically it means don't leave anything for chance, study and test until you are satisfied with the results. That phrase has stuck with me and always made me push myself to test multiple ways and it helped when later in my…

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