Compression tests - Conventional vs. Labscope

Brandon Steckler compares two tests in this recording.

One being the conventional method of compression testing vs. a more modern version called relative compression testing.

When beginning your diagnostic approach on any diagnostic routine, it is always best to develop a route to travel early in the game.

One early step in that approach when diagnosing a misfire should include a relative compression test. This test is non-invasive, very quick and powerful.

We want to know early on if we suspect there may be a mechanical failure or not before performing more invasive tests.

Thanks for watching!

[mike-ypuk]

Great video and it's so simple. I like the low hanging fruit concept. It's funny because when I saw Brandon's face I knew it was a video that I would learn something. This guy knows and knows how to explain the fine working details. I'm one of those people that has to fully know why I'm doing something before I will use it even though it's a popular test Brandon breaks it down

[steveanderson]

Excellent Video !
I always use the relative compression test. Quick and accurate test. Most important time !!

[brandonsteckler]

A million thanks for all of the feedback. Thank you all for investing the time to watch.
To answer a few questions, the RC Test, monitoring for voltage-drop is almost as accurate as current measurement. The difference in reliability is minimal.
I recommend applying this test to a known-good vehicle. Then, try removing a spark plug (to create low-compression in one cylinder) and repeat the test. There is NO BETTER WAY TO LEARN this valuable technique! I use it EVERYDAY 👍

[lenarama]

Nice job Brandon. Complete explanation without wasted time like so many other Youtube posters, including professionals. I am retired from 45 years as a technician and love to keep up with what is going on in the trade.

[JoesAutoElectric]

Wow, my Jeep made it into the video LOL What a freaking amazing time with you guys! Can't wait to do it again!Brandon, great job on that video.

[SimplyDiagnostics]

Brandon, Keith & Ivan all together in one workshop - lucky customers :)

[bobbymike]

So five years later i hit on this vlog, if that garage is yours and u own it top man, if that garage aint yours and you work there they aint paying you enough and your talent is wasted, great vlog great explanation, you have a great easy way to explain things that is instantly understandable, brilliant vlog...

[gerrycantwell]

I am learning so much off this guy. Cant say i can keep up that easy, so i watch the video a few times for my slow brain. Fantastic explanations, very impressed! Thank you

[ThunderbirdRocket]

Super helpful ! Wow ! Such an outstanding tutorial ! Extraordinary detail !! You provide precise coaching cues for us to do the procedure ; AND, include all the other pertinent information — namely, the “who, what, where, when, why, and how !! I’m learning lots from you ! Thanks mate !!
🙌🏼

[JOHNPHUFNAGEL]

I was at a shop for a different problem and I overheard another mechanic was bitching about removing the intake to do a compression test so I did a RC test and found he didn't have a compression problem he was so impressed he gave me $100 dollar bill!!
Great job Brandon

[SuperMarioDiagnostics]

Excellent demonstration Brandon, thanks tbt for putting this info out there. It took me months to prove to my shop that rc is trustworthy. Id have to do it conventional just for them to feel comfortable with rc testing. Now they don't bother, i print the waveform, and they don't question, ever 🤣

[PaulysAuto]

Thank God for all of you guys out there sharing your knowledge and experience with all of us!!!!

[Premier-wk]

Good testing/procedure and as usual, "knowledge is power" and being efficient in this field is very KEY! Time management guys.

[pskauto]

This was so professional, that Brandon even said AFFIX . I like it 💙

[ktcgarage]

This guy is a great teacher and very precise
I would let him work on my trucks anytime. And I’m Looking for more vids by him. Hope he has several

[SmittySmithsonite]

I had no idea you could do a relative compression test with a scope without an amp clamp! Great stuff right here - thanks for that one, Brandon! AC coupling right at the battery - I'd have never thought of that. 👍👍

Noticed Keith and Ivan making cameos in the background there - now that's a garage people will want to bring their modern, computer-controlled problem-children to. 😎

Happy New Year guys! 🍻

[djosbun]

An extremely well made video! Extremely professional and very well spoken! You are an asset to your professional, Brandon. All you NY guys (Eric O., Keith, Eric and more) are top-tier professionals! I am now a subscriber!

[xj]

The light bulb went off when you moved the cursor to zoom. I have a verus edge and I thought the zoom was useless. Thanks clearing that up !!!

[schwazelbacher]

Cool video! I never thought to use voltage drop for a relative compression test! I appreciate the clear and concise explanation! Thanks!

[gearheadautomotivel.l.c.]

Excellent video as always Brandon! The power of the scope cannot be underestimated. Been playing with a pulse sensor recently and all of the opportunities it presents.