Cranking compression sound and scope test

Рет қаралды 103,527

7 жыл бұрын

For you DIYers out there, the first part of this video will be invaluable for you because all you need is your ear. What does an engine sound like during cranking with low compression on one or more cylinders?
Tests shown
- cranking compression sound test
- relative compression test with a scope
- how to sync a relative compression pattern with an ignition event to ID specific cylinders
Related videos
- How to perform a compression test with a scope (Picoscope)
• How to perform a compr...
- How to perform a compression test with a scope (Verus-Vantage)
• How to perform a compr...
- uScope compression test (start at 15:23)
• How to find a misfire ...
- Relative compression testing variables
• Jumped timing chain (n...
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express 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 the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

Пікірлер: 308

@SmittySmithsonite 7 жыл бұрын

For you new guys out there, let me tell ya - get the book, AND subscribe to the Premium Channel - you'll thank me later. :) They sure don't build 'em like they used to, aye Paul? Can't believe the problems that happen so soon on so many vehicles today. They might not get us where we need to go ... but, they'll keep us employed at least! :D Great vid, as always.

@ScannerDanner 7 жыл бұрын

Thanks Smitty!

@Viper81766 7 жыл бұрын

Paul is "the man" for all things electrical and engine performance .

@worsttintentions 7 жыл бұрын

That overlay on the screen is definitely awesome. Keep it up!

@ScannerDanner 7 жыл бұрын

thanks Bobby!

@benneel3046 4 жыл бұрын

Been using my ear for quick checking compression my whole life, I always catch myself diagnosing random cars on KZfaq and in public haha.

@dil6969 7 жыл бұрын

It's amazing how a lot of vehicle problems can be identified by ear. Helped me find a blown head gasket a few months ago.

@ScannerDanner 7 жыл бұрын

awesome

@keithdin7337 6 ай бұрын

i am obsessed with all this, i.e. listening to crank, and idling. Thanks to this channel for enhancing my automotive diagnosis skills.

@edmer4365 7 жыл бұрын

Mr. Danner; I just recently retired form the Army and going to the Mechanic school in Aug here in Columbia, SC. I am matching all your videos and I am also subscribe to the premium Chanel. In my opinion you are the best or one of the best teachers I ever seen. thanks for all your teaching in the Auto mechanic area.

@ScannerDanner 7 жыл бұрын

Thanks so much Ed

@edmer4365 7 жыл бұрын

I will alway follow you as a my 1st Mentor.

@Viper81766 7 жыл бұрын

Get Paul's book and sub to the premium channel and tell your friends too also .

@orville58 5 жыл бұрын

I started wrenching in the seventies with that said this test is so much easier than the old way always trying to learn

@ScannerDanner 7 жыл бұрын

Some extra video this week. And since I've shown this before I didn't want you to have to wait until Tuesday.

@BigDog50001 7 жыл бұрын

ScannerDanner Extra videos are like more tools, never a bad thing!

@richardsalaverria9363 7 жыл бұрын

Awesome addition/refresh to the relative compression test videos. I learned this trick from your channel and have been using it since I bought a vantage pro and low current amp probe after watching your videos. I also learned something new from this video about the difference between the peak heights in the waveform, it made total sense. Thanks for the awesome videos on both of your channels.

@ScannerDanner 7 жыл бұрын

Thanks Richard!

@mored3054 7 жыл бұрын

Damn... Danner is a true car Doctor. Thank you for sharing your knowledge.

@Sloppyjalopy123 6 жыл бұрын

Thanks for sharing your knowledge with us. This is the content I search for in my quest to learn diagnostics.

@baxrok2. 7 жыл бұрын

Great demonstration of a very useful test. Thanks!

@DaveSender66 7 жыл бұрын

Thanks to you and your son for this video. You helped me repair my fuel injectors on my 05 Silverado from watching one of your videos! Love your book keep doing what you do Brother !!!!!!

@ScannerDanner 7 жыл бұрын

Thank you Dave!

@Kamel419 7 жыл бұрын

I've been watching your channel for a long time, but never commented that I can remember. Your videos are always so refreshing... the way you positively identify problems blows my mind. Keep up the great work, hope to subscribe someday just to show my support.

@ScannerDanner 7 жыл бұрын

Thanks so much! You will not be disappointed.

@movingupautodiagnostics8645 7 жыл бұрын

Great presentation Paul, and Caleb is doing a great job too! That scope overlay is cool too!

@ScannerDanner 7 жыл бұрын

Thanks brother

@stationaryenginesworldwide 7 жыл бұрын

Great job Paul and Caleb,you two are getting good at this stuff .....an Enjoyable video thank you

@sneakysnake109 7 жыл бұрын

Very nice vid. Thanks for what you do to educate us. It is appreciated.

@richardmcwhirter9396 7 жыл бұрын

Good work again and a great camera man!Thanks for sharing 👍👍

@mattanderson1831 7 жыл бұрын

Hey Paul, what a coincidence that hours after watching this video I went to look at a friends car after overheating. Cranking it, it sounded like low compression. After using a gauge, two cylinders completely dead. Loving the new videos with your son. thanks, matt

@ScannerDanner 7 жыл бұрын

awesome! Thanks MAtt

@NewLevelAuto 7 жыл бұрын

Yes sir , teach that boy! Awesome video as always brother. You're blessed to have him along with you and learning. Hope the guy gets the new head for free.

@ScannerDanner 7 жыл бұрын

Thanks Keith!

@jeffhesse8415 7 жыл бұрын

Excellent video. First tool to use on a misfire, listening to the engine cranking.

@ScannerDanner 7 жыл бұрын

exactly!

@8power0 7 жыл бұрын

Great video love the combination of tools .

@jasonhamby5228 7 жыл бұрын

i have the premium channel and i have also been running my on shop for 12 years and SD has thought me loads on new ways of doing things. thanks a lot and keep them coming.!!!

@ScannerDanner 7 жыл бұрын

Thank you so much Jason!

@Viper81766 7 жыл бұрын

Amen

@apollo11capcom39 Жыл бұрын

Ive been trying to isolate a lean misfire situation for close to a month now (I'm not a mechanic, I'm a driveway mechanic when I'm forced to be), in the process installing: New spark plugs New plug wires New MAP sensor New EGR valve and gasket New distributor cap New distributor ring seal New distributor rotor New upstream o2 sensor New downstream o2 sensor New PCV valve New various vacuum hoses In my 2000 4cyl accord with 360k miles, and now after watching the first minute or two of this video, have finally diagnosed it as low compression on cyl 4. It took me literally 5 minutes, I paused the video, got dressed, grabbed my keys, unplugged my distributor and cranked it over. It was even more pronounced than the car in your video. Now I don't know if it'll ever see that 400k mark, and I'm sure it's due to rings, and a variety of oil leaks Ive been trying to plug like the little Dutch boy. Great video, thanks for posting it...

@ScannerDanner Жыл бұрын

You may get lucky, your engine may need a valve adjustment (if it is adjustable, most are not). Thank you!

@ScannerDanner Жыл бұрын

The sound test is awesome isn't it?

@henriqueazulao 7 жыл бұрын

Thank you for the amazing explanation, it was very useful to me. I'm from Brazil and I'm learning how to use the escope.

@ScannerDanner 7 жыл бұрын

awesome!

@vincebauer4777 7 жыл бұрын

keep up the great work paul

@8953147 7 жыл бұрын

Glad your son is helping and learning...he might be the next ScannerDanner!!

@ScannerDanner 7 жыл бұрын

Hope one of my boys takes over in the future. Thanks!

@Viper81766 7 жыл бұрын

Another great video my brother .

@GRUSSNewton 7 жыл бұрын

Great video Paul!

@ScannerDanner 7 жыл бұрын

Hey Gruss! Thanks! Haven't heard from you in awhile

@frmanuel83 7 жыл бұрын

Nice video man!

@mkaminski100 7 жыл бұрын

Great and educational video. How to diagnose cars without disassembly and replacement of non-faulty parts.

@wysetech2000 7 жыл бұрын

Well done video, Paul and Caleb. Seems to be a common problem on the 3.6l.

@jonsdiagnostic5879 7 жыл бұрын

Thanks Caleb for filming!!!

@jonsdiagnostic5879 7 жыл бұрын

You do a great job

@ScannerDanner 7 жыл бұрын

and editing! This was his first edit. I only changed 4 things when he was done.

@carslover3509 7 жыл бұрын

man I like your style when you explain things ,,, very like it

@ScannerDanner 7 жыл бұрын

thanks so much!

@Mr92cadi 7 жыл бұрын

awesome way to show the scanner data. thanks for the video

@ScannerDanner 7 жыл бұрын

thanks christopher!

@chriskatanic8080 7 жыл бұрын

Just had one of these with the exact same problem come into my shop last week. Did the same thing with the cranking compression/starter current draw test with my Pico (that I learned from your channel). Chrysler has extended the warranty on these for replacing the cylinder heads for this problem, and the customer should check with the dealer to see if this car could have the heads replaced for free before they tear into it.

@ScannerDanner 7 жыл бұрын

Thanks Chris! And for the tip

@motorcyclesandridingfree2899 7 жыл бұрын

Excellent as always Paul. Likely that thing needs a cylinder head pretty common on those 3.6 liters

@ScannerDanner 7 жыл бұрын

as I am hearing! Thanks man

@throttlebottle5906 7 жыл бұрын

junk yard is more fitting a place and start taking away fat cat salary to reimburse folks :)

@kirkabrahamson1148 7 жыл бұрын

Lovin the new cameraman assisted vids.

@ScannerDanner 7 жыл бұрын

Thanks Kirk

@mikeanderson1994 7 жыл бұрын

great job your the man keep it up

@javaidmalik1 7 жыл бұрын

thanks Paul sir I was looking for the what you show in this video it's worth for me thanks for your always good video

@ScannerDanner 7 жыл бұрын

Thanks you my friend.

@jacquesdaoud4263 7 жыл бұрын

i enjoy watching you thank you for posting

@ScannerDanner 7 жыл бұрын

thanks for watching!

@charlemagneverzosa1603 3 жыл бұрын

Great video thanks....youre the best.

@ScannerDanner 3 жыл бұрын

I appreciate that!

@robertomijango6207 3 жыл бұрын

great video thank you for you time

@wenseslao521 7 жыл бұрын

you are the best paul

@ScannerDanner 7 жыл бұрын

thanks bro

@BoostedMoose517 7 жыл бұрын

Very nice video Paul! Those new 3.6L from Chrysler had valve issues on the Bank 2 cylinder head. Girlfriend owns a 2013 200s with that engine and received a letter from Chrysler giving her a extended warranty up to 150K miles on that cylinder head. I'm willing to bet that is the issue. Had 2 of these town and country's head to the dealer for this issue also. But all in all great video my man!

@ScannerDanner 7 жыл бұрын

Why only bank 2? someone else said the same thing

@BoostedMoose517 7 жыл бұрын

ScannerDanner not sure... always wondered why bank 1 doesn't do it. Also the two can I personally seen the issue on was either cylinder 2 or 6 haven't see one personally with cylinder 4. It's odd but I never really looked too much into it that's for sure tho

@slicknick4140 3 жыл бұрын

"I just came here to take a quick listen..... Ok now Pete get to work, my jobs done" 😂

@santichamorro167 7 жыл бұрын

Thank you again her from Holland .love de way you teaching!!!Y wil again be part of de primium!

@ScannerDanner 7 жыл бұрын

Thanks man! Unfortunately KZfaq has placed country restrictions for the paid channels. But there is a way around it using a VPN. Below is a threadI've created a thread on my forum to help. scannerdanner.com/forum/scannerdanner-book-questions-and-discussion/475-access-to-sd-premium-in-non-listed-countries.html Thanks for your interest and I hope you can make it work for you. Paul

@santichamorro167 7 жыл бұрын

ScannerDanner Hou do i now if Holland is on the list?

@ScannerDanner 7 жыл бұрын

Just click subscribe. If it lets you, you're good! Let me check...

@ScannerDannerPremium 7 жыл бұрын

Holland is not on the list.

@ammarabd6996 7 жыл бұрын

thank you

@DriveShaftDrew 7 жыл бұрын

YUP GREAT JOB BUDDY

@ScannerDanner 7 жыл бұрын

thanks Drew

@Liamautomechanic 7 жыл бұрын

good vid.

@leoraeina5148 7 жыл бұрын

Hey ScannerDanner, I like watching your videos, even though I watches Ericthecarguy LOL, but you both are really nice to people who needs help for their own car, to me it really help what I'm doing on my car(HOLDEN), but that's cool. Anyways, I'll keep on watching your videos.... I'm Leo Raeina from Melbourne, AUSTRALIA....

@ScannerDanner 7 жыл бұрын

Thanks Leo!

@ninjatechauto655 7 жыл бұрын

Done a bunch of these heads on both the 3.6 and the older 3.7. Dealer workflow is verify that it is not the coil pack, sparkplug or fuel injector. If it is none of those then do a leak down test. If more than 25% leak down, replace head on misfiring bank. The dealer scan tool does a bit better job at seeing the misfires to find the offending cylinder.

@mohamedrahib7685 7 жыл бұрын

thanks Paul for this video God protects you and your son to

@ScannerDanner 7 жыл бұрын

Thank you brother. Yes He does and you too!

@lambertotejada7769 7 жыл бұрын

I like this video and the transparent display

@ScannerDanner 7 жыл бұрын

thank you!

@megomiftah 7 жыл бұрын

thank you very much for making great videos for us i cant explain your respect in my heart sir?

@ScannerDanner 7 жыл бұрын

Thanks Mr SCanner manner

@megomiftah 7 жыл бұрын

my name Ahmad

@variablethrust 7 жыл бұрын

that rubber thing you found is located on the under side of the engine cover. anti vibration damper.

@roomykhan9872 7 жыл бұрын

nice video sir

@alb12345672 7 жыл бұрын

Ford IDS does it thru the scan tool. I think it watches the crank signal. There is a crank test and a running test.

@Geekdiymechanic 7 жыл бұрын

Great video. Hey, did Pete tell you what exactly was wrong? Thank you for sharing your knowledge. My abilities and knowledge have grown exponentially because of you.

@ScannerDanner 7 жыл бұрын

They traded it in. No work was done. From the comments below, seems a common problem on this engine is a valve issue

@josemontes9050 7 жыл бұрын

Paul is nice to find a professional camera man that can assist you.

@ScannerDanner 7 жыл бұрын

for sure!

@ws2664 7 жыл бұрын

i dont what you say, this never gets old

@ScannerDanner 7 жыл бұрын

thanks bill

@dksob81 6 жыл бұрын

Just so this info is out there, I don't know if you saw it or not or if it is relevant to this video. but Chrysler did extend the warranty coverage on the cylinder heads for 2011-2013 3.6L to 10yrs/150k miles..... Bank 2 heads are having problems. I have had many of them in my shop within the last few months.

@mugsymydog 6 жыл бұрын

Paul in the description you show both the low amp probe and the High amp probe. I see you use the Snap on one. Does the Snap on one incorporate both High and low amps in one unit or is it just the one you have. If that is the case which is the one most commonly used for lab scope tests.

@josephtucci3666 7 жыл бұрын

A very cool vid Thanks Paul. It sure sounded like only one cyl. was bad not 2 live and learn huh.

@ScannerDanner 7 жыл бұрын

It did have a different sound. I need to put together an audio stream of good and bad sounds and include this one as well. Make it a 60 second video from my other videos.

@e.k2801 6 жыл бұрын

Thanks from Germany

@ScannerDanner 6 жыл бұрын

My sister lives in Marburg, hope to visit her again soon.

@e.k2801 6 жыл бұрын

ScannerDanner nice, let me know when you come to Germany

@DIETRYING001 5 жыл бұрын

Paul... would you need a high amp clamp to relative compression test a diesel as they draw much more amps?

@brakedd 7 жыл бұрын

Valve guide on cylinder 2 not machined perfectly...warranty is extended on that cylinder head if it's your issue. Only the left cylinder head. Another common problem is the roller bearings in the rocker arms going south, rocker arm seizing and wiping out a cam lobe.

@ScannerDanner 7 жыл бұрын

weird that it is only the bank 2 head

@brakedd 7 жыл бұрын

And not all of them either! Just Mexican built ones as far as I can tell.

@nicknicu1787 7 жыл бұрын

Well done professor! Quick and easy! Done! 👍 How many miles on that baby?

@ScannerDanner 7 жыл бұрын

Over 100K, sorry I don't remember specifically. But I was surprised by the mileage on a 2012. I think he is a salesman.

@mikeeustice4452 7 жыл бұрын

nice video danner Chrysler has issued a tsb on that engine .it states to replace the head head due to valves and valve seat condition . I think it only applies to the front bank

@ScannerDanner 7 жыл бұрын

That's what our test showed us too! Why only the front bank? Thanks for the tip man!

@mikeeustice4452 7 жыл бұрын

ScannerDanner I don't know why all the ones I've looked at were underwarranty don't quote me but I think Chrysler has extended the warranty due to this

@huracan200173 7 жыл бұрын

Awesome troubleshooting! Can we get a video with the cylinder fix afterwards? :D Please? hehe

@ScannerDanner 7 жыл бұрын

Sorry man, no time for me to go further on this one and I just asked Pete what they did with it today and he said the customer traded it in! What a shame. I didn't know there was a recall? Or maybe just a TSB. Someone mentioned that here.

@shopyard87 6 жыл бұрын

Like always....2 thumbs ^

@exmotorsports 7 жыл бұрын

Hey Paul.. I see you still like setting objects on windshields...At least this time it wasn't your Scanner. HAHA Another great Video, and thanks to cameraman Caleb too. Nice work guys. Cheers

@ScannerDanner 7 жыл бұрын

I did set the scanner on the windshield too didn't i? I never learned my lesson.

@exmotorsports 7 жыл бұрын

ScannerDanner... I remember..lol That's why I had to poke some fun at'cha buddy. All's good fun bro. (:

@dtrrtd774 7 жыл бұрын

What was the lesson on setting objects on windshields?

@exmotorsports 7 жыл бұрын

DTR RTD When you accidentally hit the wipers.. things have a tendency to fly off. Really not good when it's a $8k scanner.!

@wingerrwingerr4989 7 жыл бұрын

exmotorsports lol. gotcha!

@mihkelkiil2454 7 жыл бұрын

Hmm, wondering about those misfire counters. Might it be that they did not show nothing because of the low compression? Since ECM is monitoring cylinder contribution and low compression cylinders do not slow the crank down as much.

@richardcranium5839 7 жыл бұрын

chris berman is gunna have you on the next edition of "C'Mon man" for that one lol glad i'm not the only one

@ScannerDanner 7 жыл бұрын

sigh

@ScannerDanner 7 жыл бұрын

at least I warned you this was all you were getting :-)

@davit7799 7 жыл бұрын

Great video Paul.So Snap On don't have COP Probe for Verus and to use one from pico we need COP Probe, BNC Coupler and ASE flexible adapter set? 3 things to make it work?

@ScannerDanner 7 жыл бұрын

Yep and it's all listed in the description. I also listed another one that is less expensive and made by AESwave. It works just as well.

@idada459 7 жыл бұрын

The timing is ok the only thing I suspect is blown head gasket or valve issues but being two cylinder valve is highly unlikely

@glennallen7129 3 жыл бұрын

What the adapter did you use for bnc to banana?

@nathanfogg9161 7 жыл бұрын

Careful a broken valve sping, or a launched pushrod could show up as a higher compression on a companion cylinder. Ive also used a regular test lead and hold it near a coil topickup a ignition event. (NOTRECOMENDED it could kill your scopem but will work in a pinch)

@ScannerDanner 7 жыл бұрын

Agree, not the recommended test lead for that COP probe.

@timowallin8020 7 жыл бұрын

Nice one, Paul! If you dont have COP pickup handy, then is it easyer to get to PCM on this one, for timeing or the sourse it self coils/injectors,(or wire harnes/connectors)... ? Reason why i ask is that the newer and newer the car gets in here where i work, it looks like its easyer to get the ECM/PCM, then the sourse on what ever it is. All is shealded for some reason.....

@ScannerDanner 7 жыл бұрын

For sure, or in this case I could have synced off of coil primary.

@darrenflounders2803 7 жыл бұрын

You using verus edge...if so how is it against the verus pro as I am thinking of upgrading,,,,cool work you do keep up the good work thanks from the uk

@ScannerDanner 7 жыл бұрын

I love it. Is it worth upgrading? I'm not sure. Depends on the cost.

@Ravenshadowson 7 жыл бұрын

I beleive that there is a extented warranty for this issue. The cylinder head will have to be replaced. All for free. X56 recall if I remember correctly This is a common issue with this engine. However this engine is making noise like it has a bad set of lifters. On the 3.6 if the oil isn't changed often enough they wipe out the cams and the lifters get replaced also.

@ScannerDanner 7 жыл бұрын

thanks for the tips!

@theadventuresofjavier8698 7 жыл бұрын

late checking in Paul. for some odd reason the boss expected me to ignore your video and finish this timing belt job...how rude of him....hey boss ,it's scanner danner..!!.take care amigo

@ScannerDanner 7 жыл бұрын

hahaha nice! Thank you amigo!

@ozzstars_cars 7 жыл бұрын

Did Pete figure out what the mechanical issue was on cyl 2 and 6? I'm not used to the lack of detail in your vids haha Great video....as always

@ScannerDanner 7 жыл бұрын

Man, busting my chops. I know, I know, you guys wanted the whole thing. I just couldn't bring it on this one and I wanted another, newer version of how to perform a relative compression test video for my class, so this was it. Thanks Oz

@ozzstars_cars 7 жыл бұрын

It's all good! Take care and have a good holiday weekend! -Glen

@e.k2801 6 жыл бұрын

Is it possible with Handheld osscilator from China for 150 bucks. Have bnc Connection...must buy with hantek CC 65 clamp

@rstar88105 7 жыл бұрын

On VW/Audi 2.8l engines I know if that engine floods out it washes the rings to the point where it sounds like ZERO compression (like the timing belt is off or the spark plugs are removed). Just something to watch out for.

@ScannerDanner 7 жыл бұрын

definitely need to be aware of cylinder wash

@jasonhamby5228 7 жыл бұрын

O yea if u put together that mission trip? I would be game in going and helping them get some of there cars up and going

@velocity550 7 жыл бұрын

Great info. It would be nice if we could find out what the problem was. Being two adjacent cylinders, I would guess a head gasket.

@ScannerDanner 7 жыл бұрын

I know. I'm sorry. As I told another guy. This was all I could do this particular day. It was show this or nothing. I wanted an updated, relative compression test video for my class anyway, so this was it. The last one I showed using the Verus was a waste spark system and I synced it using some stupid adapter Snap-on sold (SIA 2000). That thing was a piece of crap.

@trailerfitter2 7 жыл бұрын

I suppose with a common rail diesel one can get a pulse of an injector to mark the cylinder?

@ScannerDanner 7 жыл бұрын

exactly

@randy1ization 5 жыл бұрын

pull the plug wires one by one when your cranking it with the scope on,, the high peaks are the bad ones

@stevec5657 7 жыл бұрын

Did you happen to note the mileage? I'm curious if it had a lot of miles on it. Another great video - thanks!

@ScannerDanner 7 жыл бұрын

150K? not totally sure

@davidessien5465 2 жыл бұрын

Please guide me on what I should be looking forward to as you cranked the engine to verify if there is compression or not in the car and others?

@ScannerDanner 2 жыл бұрын

Single cylinder with no compression is what you're listening for. So single cylinder misfiring. If you have a no start, this isn't your test

@randy1ization 5 жыл бұрын

do you teach SRS airbag repair

@JSXSProductions 3 жыл бұрын

My Jeep's got this engine and misfiring on 6 too :( I was hopeful that it wasn't a compression issue when I did a compression test and it was still reading roughly 120 PSI... But cranking sounds just like this.

@ScannerDanner 3 жыл бұрын

Yeah you can't go by a compression gauge for this problem because sometimes it is good, so your manual gauge will not pick it up because of the check valve

@mugsymydog 6 жыл бұрын

Can I perform these tests with first generation Snap On Modis following your direction in this video ?

@ScannerDanner 6 жыл бұрын

yes you can

@CharlesAndCars 7 жыл бұрын

What software do you use for editing your videos?

@ScannerDanner 7 жыл бұрын

It's a secret :-)

@mugsymydog 6 жыл бұрын

In the description you show both the low amp probe and the High amp probe. I see you use the Snap on one. Does the Snap on one incorporate both High and low amps in one unit or is it just the one you have. If that is the case which is the one most commonly used for lab scope tests. REPLY

@ScannerDanner 6 жыл бұрын

The Snap-on one I am using is a low amp probe and you will pay 4 times as much for the same amp probe I have listed. The reason I also listed a high amp probe, is with the low amp probe you are limited by the size of the jaws (wire size) and it will not read more than 250 amps.

@ScannerDanner 6 жыл бұрын

you will get by with 90% of the testing you need to do on cars with the low amp probe

@yusuihang 4 жыл бұрын

Newbie question: if a car doesn't have a clear flood mode, what is the best way to disable the fuel injectors for the relative compression test? Pull fuel pump fuse?

@ScannerDanner 4 жыл бұрын

great question! Yes, disable the fuel pump, just be sure that when you do that, that you are not also disabling the ignition system if you are using that as a sync like I did in this video

@balachandran960 7 жыл бұрын

Global disable shows on screen, so misfire detection disabled, may be fuel level low 😊

@jwark6 7 жыл бұрын

Chrysler has an extended warranty covering the front cylinder head for this issue for some years. FREE repair at a dealership possibly. (1 year as Chrysler parts manager)

@ScannerDanner 7 жыл бұрын

Third person to mention the front cylinder head. Why only the front head?

@AuMechanic 6 жыл бұрын

13:57 Was that a sub contract diagnosis for a workshop. Who does the leak down test.??

@ScannerDanner 6 жыл бұрын

yes it was. The garage owner would take it from here

@AuMechanic 6 жыл бұрын

Thanks for the reply. I've done a bit of sub work and one thing workshop owners expected of my report was they could read it and then call the customer and give them some ball park on time, cost and whats wrong, not have to put another tech on it to do more tests to find out that. You can tell him its 2 down cylinders but for quoting purposes he would likely need to know if its top or bottom end, or perhaps overhead valve train. A look at the oil cap off for blow by and a vac gauge on the intake to look for valves narrows it down enough to then quote a full engine or just heads. My prime objective was making sure my report gave the information they needed to quote the job directly from it the moment i handed it over worked well for them. A lot of cases might need more than instrument testing to quote but more often with a few hand held instruments it could be narrowed down enough.

@ammarabd6996 7 жыл бұрын

Can I know the tools you use in your business Thank you for making a great effort

@ScannerDanner 7 жыл бұрын

Ammar, check out the tools page on my website www.scannerdanner.com Thanks!