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Compression Test with a Scope [PicoScope, Autel MP408, Micsig, & Autel Ultra] 

Master Automotive Training
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I was always taught you start with a general test to determine if that system is okay.
Using a Relative Compression Test (RC Test) one can see right off the bat if the promblem is mechanical. If the RC test passes then you know it has to be either Fuel or ignition related. No coil swapping, no injector swapping with this test.
Charge up your scope, replace the 9v on your amp clamp and follow along as I show you with the Pico 4425, Autel MP408, Micsig ATO 1104, Autel Ultra, How to Set it up and how to run the easy RC Test.
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6 июл 2024

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Комментарии : 104   
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
This video is meant to be educational. I cover multiple scopes like the title says, if you are looking for a quick fix, or want me to tell you swap these parts and you are done, find another channel, that won’t happen here. I teach how to do things right, NOT how to guess. This is a 20+ minute video that means it’s not a quick fix video, so don’t expect it to be quick.
@joelopez40oz23
@joelopez40oz23 2 года назад
I have the micsig scope. When i do relative compression test i dont get a square wave when connected to the control wire of the coil on a 2003 honda civic. I get an erratic signal. The square wave appears when the engine is idling. I had similar result on a 2010 Lexus. Any idea what i might be doing wrong?
@juergenscholl2843
@juergenscholl2843 2 года назад
@@joelopez40oz23 How do you stop the engine from starting? Do you manipulate anything related to spark? On the Lexus make sure you're scoping the IGT signal and not the IGF.
@joelopez40oz23
@joelopez40oz23 2 года назад
@@juergenscholl2843 On the Lexus i removed the Fuel pump relay and used the igt signal. On the Honda i removed the fuel pump fuse. Does the time per division matter? I use 1 second per div and 100 mili sec per div with same results.
@nwokejaphet9442
@nwokejaphet9442 Год назад
I want you to do more on autel m408
@lorayhinny8956
@lorayhinny8956 8 месяцев назад
Thanks this was helpful
@tonygovender3805
@tonygovender3805 Год назад
Well in Africa we don't have fancy equipment like you. But we still fix bmw, audi etc. But I really think you a very good lecture. You people in the USA are very blessed with training and information. Thank for your videos
@chulito240
@chulito240 Год назад
Doing diagnostics for a long time, here is the best piece of advice learned about 20 yrs back. Always perform an audible relative compression prior to anything. Doesn't matter if its a misfire, feeling of imbalance, or even a tune up. My scope is always on a light rolling cart with the scanner ready to go. If I hear an imbalance, I already know my next path. Saves a ton of time and money from inspecting and checking components that are not the root cause.
@hammerhead6537
@hammerhead6537 2 года назад
Excellent demonstration, very clear, well done sir! Thank you.
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Thank you for watching!
@ThunderbirdRocket
@ThunderbirdRocket 10 месяцев назад
Super helpful ! Extraordinary detail !! I learned a few new things !!!! Thanks !!!!!
@alfonsoguzman2099
@alfonsoguzman2099 Год назад
Very clear explanation 👌
@charleskeenom9481
@charleskeenom9481 3 месяца назад
I love your help I am trying to learn the scope, thank you
@rdaleyj1
@rdaleyj1 Год назад
Awesome explanation thank you.
@kevincottman-dq7xg
@kevincottman-dq7xg Год назад
Great video, Imma start using a scope soon
@rdaleyj1
@rdaleyj1 Год назад
I'm really glad I seen this video before doing an RC test on my vehicle. Do you have any other videos that you used the MP408 scope?
@DJ-tn7vj
@DJ-tn7vj 2 года назад
Appreciate the video. As you said. No excuses 😜
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Yes sir, no excuses why we can’t use this simple method daily on every car.
@EATSLEEPFARM
@EATSLEEPFARM 2 года назад
Thank you for posting some ultra content. There’s not that much out at the moment. Great stuff man👍
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Thank you for your support! If you'd like some specific Ultra stuff let me know.
@EATSLEEPFARM
@EATSLEEPFARM 2 года назад
@@MasterAutomotiveTraining awesome!!! Would def like to see some more of the scope
@EATSLEEPFARM
@EATSLEEPFARM 2 года назад
@@MasterAutomotiveTraining how about a pressure transducer? Can you use one with the ultra? Thanks!!
@cannbudo
@cannbudo 2 года назад
Very helpful thank you!
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
You're welcome!
@DJ-tn7vj
@DJ-tn7vj 2 года назад
Thanks again bro for the various methods. Really appreciate it 🤣
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
No problem! Glad it helped, some people just want me to say swap this coil, change plugs and cross your fingers.
@DJ-tn7vj
@DJ-tn7vj 2 года назад
@@MasterAutomotiveTraining then thats not diagnostic testing. That's parts cannon finest.lol. yo bro. Keep up the good work. We all appreciate all the effort you guys put out there even the ones who act like they don't
@codysautodiagnosticsprogra8706
@codysautodiagnosticsprogra8706 2 года назад
Nicely done sir!
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Thanks Cody!
@joelopez40oz23
@joelopez40oz23 2 года назад
@@MasterAutomotiveTraining Do you recommend the Micsig as an entry level scope? I have the Uscope and am considering purchasing the Micsig to expand my Scope knowledge.
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
@@joelopez40oz23 I do, its a great tablet based scope, very powerful with lots of the bells and whistles similar to like pico.
@fishonnelson2353
@fishonnelson2353 Год назад
Great training.. I have never setup the 720 degree markers.. I am guessing that we could see timing slip if our cylinders dont line up with the proper and expected degree lines?? correct? anyone?
@user-ym2bm5vc5w
@user-ym2bm5vc5w Год назад
i have m408 having little issue setting up custom probe for rotkee PS16 Pressure transducer on custom probe setting
@yordanestevez1197
@yordanestevez1197 8 месяцев назад
master in the maxiscop it is necessary to use attenuators to see the primary circuit signals and injector signal I have doubts about this thanks in advance
@0876juan
@0876juan 6 месяцев назад
Saludos Gracias 👍
@estatesrecords
@estatesrecords 2 года назад
Hi great and informative video, where can I get the new autel MP408 software with the degree rulers.
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
We have it on our website: masterautomotivetraining.com/collections/lab-scope/products/autel-mp408-4-channel-oscilloscope
@weshawkins7165
@weshawkins7165 2 года назад
Great instruction. I just got my AutepMP408 yesterday and I’ve been playing around with it. One question I have is when do you use the attenuators?
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Congrats on the new MP408, you'll love it! I contacted Autel asking for math channels hopefully they listen soon! Attenuators are used when connecting to fuel injector, ignition coil or anything that can produce a high voltage spike. For example a fuel injector when the current collapses can spike above 50v, and if your scope is low voltage input can fry the channel. You MP408 comes with a 20:1, means for every 20V in you'll see 1v on your scope screen.
@weshawkins7165
@weshawkins7165 2 года назад
@@MasterAutomotiveTraining Specs on the MP408 say it has a 200 volt +& - overload protection.
@bosshoss14
@bosshoss14 2 года назад
@@MasterAutomotiveTraining did you need to use the attenuator in this test with the MP408?
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
@@bosshoss14 not on this coil, because it is an intelligent coil 3 or more wires. It only gets a square wave from the pcm to turn on the base of the transistor within the coil. If you have a 2 wire coil you’d need an attenuator.
@faticervin6435
@faticervin6435 Месяц назад
Gracias teacher por compartir lo que save Att Fatima
@MasterAutomotiveTraining
@MasterAutomotiveTraining 13 дней назад
Con gusto Fati, cuando te vemos de regreso a clase?
@bestautomotivebasix
@bestautomotivebasix Год назад
this is a good vid
@MasterAutomotiveTraining
@MasterAutomotiveTraining Год назад
Thank you!
@MechanicTechnicianRepair
@MechanicTechnicianRepair 2 года назад
exselentes dianostic master mui bien expricasion
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Muchisimas gracias por apoyar a nuestro canal!
@MechanicTechnicianRepair
@MechanicTechnicianRepair 2 года назад
Saludes master. Yo tengo una preguta para ustes ustes. Da crase para prepar ASE y breke
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
@@MechanicTechnicianRepair si damos eses clases de preparacion de ASE.
@flatrateus
@flatrateus Год назад
45 years experience and I can diagnose and understand any scope screen just can't figure out how to set the scope to read. Much like a musician who can play an instrument but can't read a note of music. I think I will stick with what I know and throw my scope away.
@1Wayfix
@1Wayfix 2 года назад
Thanks for the video oscar. Hey. I have a question. I use the mp408. But how u get. That clean. Signal. My looks. Dirty all the. Times. With too much noise. And can i use just the lids. That come with the mp408. To do it. Or low amp clamp. ? Thank you so much.
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Hey buddy, thank you for watching! I use Warwick leads, the black Autel leads are not that good quality. I tried them when I first got my MP408, and replaced them almost instantly. Check them out on our student store: masterautomotivetraining.com/collections/lab-scope/products/4-channel-scope-lead-set-9ft
@MegaErick2007
@MegaErick2007 Год назад
Master Automotive Training muy buen video yo compre el mp408, pero tengo una pregunta lo tenias en el canal A en 500a y luego cambio a 1ka?
@MasterAutomotiveTraining
@MasterAutomotiveTraining Год назад
Me puede decir los tiempos porfa
@MarkBrown-qh9iu
@MarkBrown-qh9iu 2 года назад
Love the videos, I have the scams micsig 4ch scope but I noticed yours has a pic of a car bottom right, mine just has the horizontal and vertical cursors there. Is there a automotive software package that can be purchased for these or downloaded?
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
I believe you just need to download the updated software, to make it there automotive scope. Only difference is they have automotive presets for common tests. Great scope!
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
I spoke to Micsig and you’d need to contact them it’s roughly $300 and they’ll upgrade the software for you to automotive.
@MarkBrown-qh9iu
@MarkBrown-qh9iu 2 года назад
@@MasterAutomotiveTraining Thanks for this, I will reach out to them will be awesome!! cheers
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
@@MarkBrown-qh9iu Cheers buddy, anytime we are here to help!
@mytravelingmechanic8104
@mytravelingmechanic8104 Год назад
Great video! Which scope would you recommend between the two channel picoscope and the MP408?
@MasterAutomotiveTraining
@MasterAutomotiveTraining Год назад
Thank you! For automotive the MP408, since it has higher input voltage. The 2000 series Pico wasn’t designed for automotive since it doesn’t have more than 20v inputs.
@mytravelingmechanic8104
@mytravelingmechanic8104 Год назад
Thanks a lot!
@MotorheadRedo
@MotorheadRedo 2 года назад
What scope do you recommend for new technicians? I bought an Autel TPMS programmer and I'm pretty happy with the quality and price. Autel is a good brand, but I know you can find cheaper tools to do the same job. I've seen technicians on RU-vid using off brand bi directional scanners that have most of the functions you find in Autel scanners, but for less money. Just wondering what scope offers the most bang for the buck.
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
I love autel scanners, are there others.... of course, does one size fit all? Nope. At a shop they must have a minimum of 2 different brand scan tools, because some work great on certain makes and others don't and sometime its just the car that won't give info. For scope, my go to is the micsig 1104 masterautomotivetraining.com/products/micsig-4-channel-oscilloscope-ato1104?_pos=1&_sid=f7ad62bb0&_ss=r has the same power as my pico 4425 but in a tablet. For $699 you can beat it, or I'd recommend the MP408 Autel pwoerful scope but its laptop based.
@mbazzy123
@mbazzy123 2 года назад
I bought the Autel Ultra, I am an advanced DIY'r and are really liking the integrated scope and signal generator. If you have time can you demo the usefulness of the signal generator feature?
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Of course! Give me a few weeks and you’ll see a few videos! Thanks for watching?
@alexlopez2313
@alexlopez2313 Год назад
@@MasterAutomotiveTraining Ive been wondering about the signal generator on my Autel. I would love to see some videos on that. Did you ever put some together?
@OP-ik7qb
@OP-ik7qb Год назад
How are you liking your Autel Ultra so far? Thanks
@mbazzy123
@mbazzy123 Год назад
@@OP-ik7qb I really like it, fits my needs as an advanced DIY'er. I like to do my own work and this has allowed me to really get into the advanced network Bus systems of todays vehicles. This is a Pro level tool and the challenge for me is to continue to educate myself on its features so that all I get the most out of it. I've been able to program and re-flash modules through the GM service portal with the J2534 integrated pass through box. The integrated scope although not at PICO level is really good.
@tylerparsons9626
@tylerparsons9626 Год назад
What are your thoughts on the Autel vs the pico? They look similar
@MasterAutomotiveTraining
@MasterAutomotiveTraining Год назад
Pico all the way! Or a Micsig if you want the power of a Pico at a fraction of the price. Check out our student store for best pricing www.masterautomotivetraining.com
@ebrahimsadeghi5883
@ebrahimsadeghi5883 2 года назад
Cool
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Thank you sir.
@troylegere6221
@troylegere6221 Год назад
I appreciate your training videos. I have done some research on scopes that you have mentioned and have come up while searching the internet. I found what looks like an inexpensive starter set up. The model is (Package IV) Hantek 6074BE USB Automotive Diagnostic Oscilloscope 70MHz 4 Channel over 80 types of measurement function. Do you think I could learn to survive on this one? From what I've seen, I believe I could. Any input or advice would be greatly appreciated. Thanks in advance.
@MasterAutomotiveTraining
@MasterAutomotiveTraining Год назад
Hello Troy, a Hantek is a good scope, however there interface isn't that great. For the roughly $400 you are going to spend, I'd recommend a Micsig, its a tablet 4 channel scope. I use this scope a lot and has quickly become one of my go to scopes. masterautomotivetraining.com/products/micsig-4-channel-oscilloscope-sato1104?_pos=2&_sid=8c4da9ee7&_ss=r
@troylegere6221
@troylegere6221 Год назад
@@MasterAutomotiveTraining I will look into that. Thank you for your time.
@ram40andy
@ram40andy 2 года назад
I had an ATO 1104 for a month and after I connected CH1 to AUX OUT to see what kind of signal it is a clicking sound like a relay comes when switch the voltage range from 200mV to 500mV on any channel. Is this normal or I should worry about?
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Most scopes do make a kind of fan coming one, relay long click sound when the scope comes alive. Some are more audible then others. Have you reading a battery with Ch1?
@abdenuryassin7582
@abdenuryassin7582 2 года назад
Do you have same thing for repair technician license
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
my ASE A8 review class works the BAR Repair License.
@loum.9418
@loum.9418 2 года назад
Will you get the same results with a none automotive Pico scope or Hantek 1008A?
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Yes you can! Even if you are using the Pico 2000 series non-automotive you can do it, just don't think it has the degree cursors. I have done this with my Hantek all in one and my 1008 series scope as well.
@loum.9418
@loum.9418 2 года назад
@@MasterAutomotiveTraining Thank you, will try and report. I'm working on a po420_on my 2000 nissan Altima.
@jche4503
@jche4503 2 года назад
Can i use a pico 600a on a autel maxiscope. And if i can how do i set it up? I get a waveform but its all over the screen.
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Sure you can, the Pico amp clamp is a BNC connector and will work with the autel scope. I'd need to know what your settings are on your clamp. Example if the clamp says 10mV/100mA this means that means that 100mV equals 1A/1000mA. Some clamps use 1mV/1A in this case if you see 10mV on the screen you are actually measuring 10Amps. Let me know your available setting on your Pico amp probe if they above doesn't make sense.
@jche4503
@jche4503 2 года назад
I found out that if i use hantek cc650 and cc65 i dont have to adjust settings to get good waveform. Its actually worth it to use the pico clamps for it gives more clean waveform. Thanx for the input. I played around with it and can get a good waveform.
@mr.technician4144
@mr.technician4144 2 года назад
Sir are you using attenuator for this test?
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Not on this one, since I am testing an intelligent coil. If it was a 2-wire coil you’d need an attenuator. If you it’s 3 or more wires you won’t need it.
@ebrahimsadeghi5883
@ebrahimsadeghi5883 2 года назад
What is the type of amp clamp Thanks
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
I use a CCA 650 and a CCA 65 amp probe with a BNC connector. masterautomotivetraining.com/products/ac-dc-current-clamp-cc-650?_pos=1&_sid=3aa85e294&_ss=r
@cesarjorgemurillobarientos1813
@cesarjorgemurillobarientos1813 2 года назад
bien
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Gracias! Cheque este también ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Z7HDZchkfoI.html
@ColdWarVet607
@ColdWarVet607 5 месяцев назад
Nicely Done! Very Nicely Done!!!I have the MP408, how did you get the horizontal cursors to read degrees!?@?# I didnt know that was possible. The documentation, all 3 pages of it, just says things like, "This sets the voltage scale, "Use the trigger", no detail other than names for a button. For cursors it just says "Use the cursors to measure" No explanation on how to even get the cursor on the screen, much less how to change it from time to degree, no explanation of the menu that had "rulers" you showed. I was a Hardware Engineer for 40 years in Silicon Valley, used 400,000$ scopes with ease. The MP408 is a nightmare, it works nothing like real scopes or at least very little, near zero documentation, sorry I ever wasted my money on it. Should have just anti-upped for the Pico. Anyway how the cursors came up to degrees Id love to know. Thank you for the demo!!!!
@MasterAutomotiveTraining
@MasterAutomotiveTraining 5 месяцев назад
I bet those higher end scientific scopes look awesome! The MP408 for automotive works marvels, obviously it lacks some bells and whistles but for the price point it’s golden. We use the degree cursors for stuff like in-cylinder waveforms, firing events, and I came across them by trial and error. Play with it and I feel you’ll come to like it.
@clinicaautomotriz
@clinicaautomotriz 2 года назад
En espanglish¿? 😂 En español tendrás vídeos??
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Aquí le tenemos en español ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Z7HDZchkfoI.html
@JamesValentineBaja1000
@JamesValentineBaja1000 2 года назад
Some are (4)....
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
(4)?
@JamesValentineBaja1000
@JamesValentineBaja1000 2 года назад
@@MasterAutomotiveTraining sry. Four wire COP.
@ctsv800hp7
@ctsv800hp7 2 года назад
Get to the point next time
@MasterAutomotiveTraining
@MasterAutomotiveTraining 2 года назад
Since this is a educational video, it has to be educational and lengthy. With in 2 minutes you see how it’s done, can’t do it faster, if you have a way I can explain this properly and quickly, please by all means let me know.
@mixAUTOTECH
@mixAUTOTECH 6 месяцев назад
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