2013 Grand Caravan - Dead Cylinder! Relative Compression Test!

#diagnostics

Prime Day Sale!
Get yourself the Leolov 2-channel oscilloscope here:

Check out my Amazon Store!

Disclaimer:

Due to factors beyond the control of Advanced Level Diagnostics, I cannot guarantee against improper use or unauthorized modifications of this information. Advanced Level Diagnostics assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Advanced Level Diagnostics recommends safe practices when working on vehicles and/or with tools seen or implied in this video. Due to factors beyond the control of Advanced Level Diagnostics, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Advanced Level Diagnostics.

[advancedleveldiagnostics]

Prime Day Sale!
Get yourself the Leolov 2-channel oscilloscope here!

Check out Joe's Auto Electric!

[jordysandino]

I love that you’re not envious and always let us know where you purchased your stuff that is so helpful for the community and very kind of you.
We appreciate everything that you do sir .

[jimpetty]

i to enjoy seeing more of your scope videos .when applicable any content is well liked and always viewed.

[jefftovani]

Wow your helping more people then you know!! Good job my friend!! Take care!!

[Akeem_]

Bro. Could you in the future show us more videos explaining how the scope works. ❤

[vmotors.]

I bought this scope a couple of months ago after I saw you use it, especially as it has two channels which are BNC connections. Haven't needed it yet, but I'm glad I got it. 👍🙂

[rodvan-zeller]

The code, mode6 and misfire history and current misfire on scan data tell which cylinder, that scope test verifies your sound suspicion, AC coupling only shows AC voltage which in this case is generated by the starter motor turning, it is called back emf and it acts as a resistance thus current draw goes down the faster the starter spins, and the faster the start spins the greater the ac voltage generated.
Great video thanks for making it.
Another video going into more detail on the scope setting would be great.
Also, with that secondary pick up you will see longer burn time on secondary ignition wave form compared to a good cylinder, because less pressure in the bad cylinder due to mechanical misfire requires less energy to jump plug gap thus more energy left to keep electron flow going.

[MarzNet]

Cool. If you take the reciprocal of your plot it would show you the pattern you would get with with an amp clamp (V=IR). I set my pico 2204A to DC when doing voltage based compression tests. It is sensitive enough to give absolute and relative data. One more thing: You can put a US quarter with a lead touching it on an ignition coil and get a nice waveform.

[keenowl]

Great info on that little oscilloscope.

[rodvan-zeller]

I have that scope. works great. I paid a lot more than your linked price one year ago.

[jordysandino]

Hello sir .
Great video as usual.
Quick question how can I buy the type of pico leads does it goes by model or what should I look for .
I apréciate your answer.

[CL]

Ah nice clean car our favorite. Too bad we can’t experience the smell in this the heat

[bobbywarthan]

I just bought this scope several weeks ago, I'm still playing with it, definitely need a different set of leads

[mlieser]

Great video! I've been wanting to get into using an oscilloscope. The Pico unfortunately is way out of my budget. It looks like Hantek has tablet oscilloscopes that record information. They seem reasonably priced. This would give a larger screen without having to use a laptop. Have you seen these and what are your thoughts as to whether they would work for automotive?

[juankrajo]

Hey! Really big fan, i wanted to ask you im looking for a Oscilloscope, im a mechanic i work on my own and love your videos right now i have a Kia that is dying intermittently and it does it not to often, so i wanted to finally add a oscilloscope to my box, but i wanted to ask for your recommendation, one that can record i guess so i can drive the car and after the fail happens i can rewatch and see if its cam or crank signal, i have look into some Fnisrn handhell 2 chanels ones and a Hantek that looks like a Pico 8channel that you plug to a PC, anyway, any recommendations would be nice, i dont live in the US but i can import stuff from there, and my budget is not huge thats why i dont go for a Pico, well thanks for your answer in advance!

[sivucit]

thanks, do u see a huge difference between volt and amp on relative compression. or voltage will do just fine. please.

[calholli]

Having a sync doesn't really help you if you don't know the firing order.. But yes, the scantool should tell you which cylinder is dropping. It's not a bad idea to put a bore scope down in the spark plug hole and see if it's a burnt valve or something... Maybe a hole in the piston, possibly

[sheerwillsurvival]

I bought that scope have not had chance to use yet

[Jpilgrim]

Dodge is one of the few that cuts spark on a clear flood crank. Very irritating! Dodge 3.6l engines also have some noisy current patterns during a relative compression half of the time too.

[philh]

Would of been nice if we could of seen the screen