How to diagnose a misfire (a ScannerDanner Premium training video)

[@DaleReynolds]

I truly have to say, I'm an auto technician. I went to tech school back in 2009, just got into a dealership position about 3 years ago (a large gap of time where technology has truly picked up). What you Paul have done and continue to do as far as these videos with the classes, troubleshooting in the field, etc has been absolutely amazing to watch and learn from. You go so much deeper into diagnosing things, far more than anyone else who I have "picked brains" from in the field. I seriously cannot thank you enough for the amount of effort you put in for those like myself who want to truly become better. I am a big fan, I have subscribed and I will at some point soon be purchasing a copy of your works. You sir are awesome! Thank you!

[@ScannerDanner]

Thank you so much Dale! Merry Christmas my friend.

[@Alchemist37]

I absolutely agree with all your comments !!! As an experienced technician in New Zealand doing diagnostic work for over 10 years using scopes I always get a little something from your videos. Today was the coil turn on oscillations and what actually produced them work respect to the 2ndry ignition. GOLD! I recommend your channel to other mechanics all the time. Thanks for all the effort you put into fighting the good fight :)

[@johnbonifas6040]

Paul is the man he is very!!!!!!good

[@timothyfulp2704]

Message me

[@timothyfulp2704]

Timothy L Fulp Tim came Tim came

[@johnmckamy6398]

I've been working on cars for 35 years and I just cant get enough ! could watch this all day . its soothing to the brain. great stuff .

[@mowerdog]

I was a ASE master tech from 1975 - 1985. I quit and started a remodeling/repair business for 35 years. I have continued to perform all my own repairs. Now I'm thinking of semi retiring and going back to working on cars part time. I have fully enjoyed all of your videos that will prep me to take my skills to greater levels. Thanks you for your time and effort to educate us.

[@mikem5475]

I've never heard of a mechanic getting money wealthy but I've met a man who made over a million from remodeling gone home flipping. He said home flips made him 60 grand in 3 months on his first try

[@averydomingue4638]

I am about to be done with my automotive degree and after watching your videos, I can see how much my local community college leaves out of the curriculum. This video is absolute GOLD. Thank you, Paul.

[@ScannerDanner]

thanks man! keep watching and check out ScannerDanner Premium from my website when you get a chance. There is a 14 day free trial, then it is pennies per day to be part of it.

[@voland4513]

This is what's called advanced performance diagnostics. Paul is the master, always ahead and top notch. Thanks for the posted video.

[@ScannerDanner]

Thanks for watching!

[@amadeomira1036]

And giving the knowledge to everyone and I would like to get some of your knowledge that you have.i don't know how to get in to your class I'm in California

[@slopoke22]

Hey man. I have my own automotive shop and I also build racing engines and racecars. I've never had a teacher for the auto world though. Even though over the years I've read alot of ASE books. But people have no clue what it takes to figure things out sometimes. I've watched alot of your vids and I am subbed. Thanks for posting and teaching this young generation

[@ScannerDanner]

Thank you so much for this comment! And for subscribing!

[@slopoke22]

ScannerDanner no prob. I attended courses at The School of Automotive Machinists (Sam Racing) in Houston Texas. One of the best engine builders in the world. So I learned to build and machine and study race engine theory. But over the past 10 yrs I have gotten alot of general Auto stuff. Alot of times it way more difficult to diagnose and figure out what's going on. But anyway I have a snap on Solus that I use and that's how I found you a couple years ago. You teach a difficult occupation very well sir. I may pick up your premium before long.

[@andrewwmacfadyen6958]

Paul has taught a lot to guys like me too :-)

[@Tony-rl2fr]

Amazingly informative presentation. Thank you so much! At 58 years old I still find this fascinating. I spent a couple thousand on a nice Pico rig about 20+ years ago and it's amazing how much you can learn just from diving in. I've been out of the professional auto repair business for 35 years but still do a lot of my own work. Unfortunately my rig was stolen years ago but watching this has kind of reignighted my curiosity. I may have to get another Pico to keep me out of trouble 😉. Danner, great job, thank you.

[@eyesalooking]

This is the first time I am starting to understand this stuff. I have the uScope and am attempting to learn how to use it. Am signed up to ScannerDanner Premium. I will be watching this video over and over until I understand completely what I am being taught.

[@ScannerDanner]

I will help you however I can. Thank you! I look forward to your questions on the premium videos

[@eyesalooking]

@@ScannerDanner Wow! didn't expect a reply since this video is a few years old.

[@thomasjimenez6930]

thank you SD for been such amazing human and teacher at the same time Im 57 yrs old I used to sell tacos for 17yrs I didnt know nothing about cars now I own to shops recently bought me the uscope and the new pico scope with the transducer and still have the verus pro and I love to see your videos keep doing this so we can continue learnig from the best.

[@mr.technician4144]

Very good teacher....all in good and clear detail you will not miss even a single shot! No trouble can escape with this man,,..all words came out from him cannot be ignored really important,,if I will be one of the students there, there's no way to feel sleepy,,when he started to speak,all came from him is always interesting..no room for drowsiness....thank you sir paul....

[@ScannerDanner]

Thank you my friend

[@movingupautodiagnostics8645]

Since I have a pocket scope, this class helped me a lot understanding how to use this tool. Waveform interpretation is one topic you covered very well on your book, which I recommend 💯 %. Thanks for all your work Paul. Shalom my brother.

[@ScannerDanner]

Shalom my brother. I hope things are looking up for you in Puerto Rico

[@lucianlucian9911]

Paul is the living proof that when you understand things from their basic principles you can make others really understand them as well. Good job Paul, you are a great teacher! You should pursue a scientific career...if time allows.

[@ScannerDanner]

Thanks so much Lucian!

[@paulmuff9883]

You are such a great teacher, theses guys are lucky to have you as not every teacher has the ability to get stuff over 👍😀😀

[@YouTube.TOM.A]

I have the greatest respect for those who teach. Not being contented until there is an outlet for the Knowledge that resides within. I am sure you learn from your students too. Happy Holidays Mr. Danner

[@ScannerDanner]

More than you know!

[@FleetTech97]

I never learned diagnosing when I did my training and I’m glad you are teaching us this. I don’t want to be a parts changer. Keep these diagnosing lessons comingN

[@jemsonabrigo]

Thank you so much Paul Scannerdanner. You are the best instructor and again thank you for sharing your premium channel.

[@ScannerDanner]

Thank you Jemson!

[@TheGibby3340]

Very nicely compressed lesson on basic scope operation and ignition waveform interpretation all in under an hour. Thankyou Mr. Danner.

[@billrimmer5596]

The info on trigger setting, horizontal and vertical parts of the waveform was great. Spark and burn time. I also liked the oscillations at the beginning of the current ramp being an indicator of the presence of a secondary winding. Thank u.

[@JuanOrtiz-mo8be]

Lol some ones phone went off during class and I praise your patience that you laugh at the situation Thanks again danner

[@ScannerDanner]

Thanks brother. I don't always have it, but I should

[@nash69ish]

Hey I don't see any diesel engine videos.! However you are the greatest I've ever seen.

[@ScannerDanner]

we don't have very many diesel cars here in the US

[@willdavenport529]

37:42. Love your content, learn from you every video I watch. Can't appreciate you enough.

[@billk5727]

You explained in detail every waveform line on the oscilloscope patterns and why it's important to know what they represent. Great instruction! Merry Christmas to you and your family. Bill

[@ScannerDanner]

Merry Christmas Bill!

[@coycarlson4979]

Paul - you indeed are and ACE DIAGNOSTIC TECHNICIAN , GREAT INSTRUCTION 👍👍 - Many THANKS ✌️✌️

[@watduheaw8941]

Thank you, Mr. Danner. From the bottom of my heart, I thank you.

[@haseenali9039]

Thank you so much Professor for this valuable information your brother Hassan from Iraq and I am a follower to this distinctive channel in the world of maintenance of cars

[@ScannerDanner]

Thanks Hassan! Greetings from the US.

[@MFV911]

Scanner your the man bro!! Keep it up God bless

[@jimmorton3009]

As usual, GREAT Information presented, and LOVE your style of presentation. Thank You for what you do for the industry, Buddy

[@8953147]

God bless you Paul and your teaching methods!!

[@wysetech2000]

Nice job, Paul. I can remember learning this same thing 40 years ago but it sure shakes the cobwebs loose. The ignition coil looks different today but the theory of operation is still the same.

[@roadkill5333]

Another great SCANNERDANNER production!! Nice job, and thanks for sharing!!

[@Ramanych]

Спасибо мистер Данер за лекцию. Способ с токовыми клещами очень интересный.

[@shaunsautorepairs5410]

Exelent stuff mr D... No one ive seen has realy explained those wave forms like that...this is one of many i will be noteing for future referance.

[@Geoff-k9p]

The video is gold. Thanks for uploading this.

[@prmayner]

Sounds like your class is growing, standing room only huh, haha that's awesome. Can I get an Amen. Amen brother.

[@Viper81766]

Rags2Wrenchs Amen brother

[@nicknicu1787]

Always a pleasure to watch the best at work! 👍

[@Sctronic209]

Coil ringing coil ringing was a test to use on fly back transformers in tv work.

[@stephenmarshall5302]

Very helpful video, also impressed with the little scope, ordered one thismorning based on seeing this. Been telling my colleagues about scanner danner I love these videos. I get Audi training which I need to fly and costs a lot but this is better

[@SS-U23]

Awesome information, awesome explanation, and awesome instructor Thank you so much for sharing this valuable video. Please keep up the good work. God bless you.

[@johnwilliams738]

Thank you for your videos. You have definitely clarified any questions I have had as I learn as I go...

[@calimesacox]

Wonderful video. Thank you for your work and sharing it.

[@ScannerDanner]

Thank you!

[@antthecat147]

Really do enjoy watching your video's. Learnt a lot on theory and approaching any vehicle faults.

[@stevenmchenry9276]

Dan you the man with the plan.

[@mikemardis403]

Love your book and your videos. As a new tech, shocking fellow techs with your techniques, I would love to see a quick reference guide for how to hookup whatever your using for whatever you’re looking for.

[@andrewk778]

Excellent. Excellent. Thank you for sharing.

[@454bard]

Just think back in the day, Every reputable shop had a scope. And when a unit came in for tune-up and/or drivability issue it went on the "scope"

[@Viper81766]

Excellent training as always. Wanted to wish you and your family a blessed Christmas and a safe and prosperous 2018 . Thank you for all you have taught us techs online with such detailed teaching. God bless you my brother.

[@ScannerDanner]

Thank you Robert! Merry Christmas to you too

[@jarinwilson9539]

I now want to take the time to wish ya'll a Merry Christmas and God Bless all of the youtube community!

[@ScannerDanner]

Merry Christmas jarin!

[@olaf3613]

I came across your videos researching a Jeep 4 liter cam/crank sensor phasing search. Next thing I know 3 hours went by. Keep up the good work. BTW, BNC is short for bayonet naval connector.

[@ScannerDanner]

That's awesome! Thank you

[@davidgoldberg]

Great lesson Paul. Thanks!

[@billyyoder8171]

Thank you Paul. Bless you brother.

[@berniceperry8898]

Excellent vids two thumbs up..kept having a po301 code pop up on my 2001 crown vic lx.. Done everything to it new coils plugs etc...done the water method and low and behold vacuum leak all down the passenger side...thanks alot dude, ive sprayed that sonofagun with carb spray and you name it...finally tryed the water and bam there it was.. I have a new intake already to install, ill post on here if it cures it for good...thanks and happy holidays...

[@ScannerDanner]

My man

[@GlycerinZ]

How could anyone thumbs down this video? They must be parts changers

[@Viper81766]

They are jealous of Paul's knowledge and capabilities .

[@ScannerDanner]

haters is all and they never comment

[@Viper81766]

ScannerDanner The other day I read some comments on a John MacArthur video where he gave a eulogy for RC Sproul and a commenter called MacArthur self serving and egotistical . People are jealous when you know your talent in life and if they are not willing to apply themselves to be better it is their loss. We watch your videos to better ourselves and thank God for your talent .

[@ScannerDanner]

I used to think the same thing about MacArthur when I first started listening to him. Now He is my favorite teacher/preacher of the Word. Funny that you mentioned him. Thanks for the comment brother.

[@Viper81766]

ScannerDanner several years back when I started watching your videos we got on the topic of faith in Christ and we got to talking about liking MacArthur . Your videos are a type of ministry in that you not only bless techs with education , you also help many people with fixing their transportation to keep their jobs, get their children to school and the doctor and have a way to church to worship . You have a gift in teaching a difficult topic in a clear yet detailed way . No words can say thank you enough my brother in Christ . A million thumbs up to you .

[@NobodyAskedForThis]

Case in point, I had a P0301. Cylinder 6 and 7 had no compression. Also, misfires aren't the only thing that can cause misfire codes. Misfire monitors, in my opinion, can only be trusted to tell you that the crankshaft slowed down. Bad ujoints, bad engine mounts etc can cause the crankshaft to slow down and can cause misfire codes. I've seen it myself.

[@jesushernandezbrito3342]

Hi Dan, will be great it if you come to CA to make a scope class.

[@TheDisgruntledMechanic]

Thanks Paul! always like to learn from you. I will be re-upping my premium sub as winter sets in.

[@ScannerDanner]

Thanks Mike!

[@stevenjames7073]

Merry Christmas and happy New Year May the Lord bless you all with happiness and joy

[@ScannerDanner]

Merry Christmas to you too my friend.

[@nash69ish]

I'm glad you love my comment. I have a 2009 kia sorento diesel. I have to spray quick start In the morning to start and throughout the day it starts perfectly if you can give me an Idea of what to check I will really appreciate it. I live in Trinidad and Tobago.

[@nash69ish]

No problem thanks brother keep up the good work and God bless.

[@nidepengyou101]

I wish I was 20 again and join you class.

[@ScannerDanner]

Never too old! 36 cents a day 😉 www.scannerdanner.com/join-scannerdanner-premium.html

[@gavinmendez4729]

You're an awesome instructor thank you I just now subscribe

[@jpack61108]

Pretty good scope info in this one.

[@Zahcosta]

Mr Danner, good afternoon. how to diagnose misfire caused by spark plug gap? how to determine the correct spark plug gap when there is no possibility to change coil charging time, or any other parameter of the ignition system? Thanks in advance.

[@ozzstars_cars]

I swear I was paying attention right here too. haha Really enjoyed the video, thank you!

[@ScannerDanner]

haha thanks man

[@nickh3809]

LOL, your face Paul @ 0:18 when they start clapping. *Light claps* (evil death stare) *claps quickly fade away* Hahaha i know it wasnt intentional just looked hilarious. "Dont you dare clap for Mr Tire while im speaking" 😭

[@markmcconnell5911]

This is great. I wish I could take your class. From Upstate NY

[@Thefox2000unit]

Excellent vid. Wee question. On the secondary circuit you said there was a fault on snap acceleration because the first vertical line didn't rise, but then straight away when you tested another hv lead and the vertical line went out of the screen you said it was because of a misfire.

[@Ironblank1]

Thank you so much I learned and enjoy this video!

[@joneskey3950]

I cannot thank you enough for these great videos you put out. If every trade school in the country had someone like you wow! Also do you have photographic memory?

[@ScannerDanner]

lol, no, I've just taught this same class for 17 years now. But thank you so much!

[@micro61micro]

great channel been a follower for a long time recently stumble into a job that's got puzzle 03 Nissan Murano v6 replace the engine with the same from another 03 Nissan Murano when finish when to start n had code P0345 replace camshaft sensor nothing check connector red wire read 12.20 black wire was also good reading middle wire signal while in idle in ohms read 5.15 open valve cover from old engine n new n they look the same however when i turn it on it barely has any power at all can u help or point me in the right direction

[@Ranalla651]

For an intermittent misfire what test(s) could be done with the scope? No one in my dealership can use the new mopar special tool : pico scope. I want to get proficient at scope usage

[@sv_endless6340]

I have a wrangler 2012 3.6 v6 with diagnostic codes P0201 P0202 P0203 P0204 P0205 P0206 all six injectors circuit open active. I only replaced the oil cooler and it was running perfect before the job. Now it is miss fire counter injector 1 and 2. I scoped the ecu pin 8 and 9 C2 connector and 8 was clean but 2 was messy. Any ideas as to where to look. I have repaired some open wiring from previous guy working on it. Thanks

[@IamKurr]

@scannerdanner I have a capacitive pickup that is very similar to the one you use. I use it with my verus and a small handheld similar to this one. It will not show nearly as much detail with the spark event as the ones I have seen you use. Connections are correct. Do you think it is just because it may be a cheap knockoff? Thanks, justin

[@OzMechanics]

Hey Paul will you be attending Vision Tech in Kansas next yr ?

[@NewLevelAuto]

Oz Mechanics yes .. great question 🙄

[@JuanOrtiz-mo8be]

New Level Auto hey Keith I hope to see you tomorrow at atg seminar Am taking the classes thanks to you mentioning on one of your videos and noted that on atg' s " how did you learn about us" Thanks again to you and danner

[@NewLevelAuto]

Juan Ortiz in NJ? That would be awesome

[@ScannerDanner]

Not sure yet my friend

[@OzMechanics]

ScannerDanner ok. Thanks for writing back Paul. Keep up the good work !

[@edwinmartinez5530]

mr can you tell what kind equipment you are using tank for sharing with us

[@ScannerDanner]

Check the description, it is all there my friend. Thank you!

[@andrewwmacfadyen6958]

Just bought your first scope ? Just thinking about buying one ? Already have one but not making use of it ? This video is a gresat starting point for using a simple oscilloscope for secondary ignition misfire, More at www.scannerdanner.com

[@ScannerDanner]

Thanks Andy!

[@mauriciodiaz6890]

Excelente clase master .mucho saludos desde chile

[@northpostman]

Hi Paul, what type of screen are you using that will allow you to control your presentation like that?

[@Thefox2000unit]

Absolutely fantastic! Wee Q. If individual coils are difficult to get at and (by the sounds of it) only 1 wire powers all coils, how do you condemn a specific coil? Thanks. N/W Scotland.

[@ScannerDanner]

You need another channel to use as a sync. Check these outkzbin.info/www/bejne/oJeseGOaoMRjb9U kzbin.info/www/bejne/r2XVZoKZfbNogsk kzbin.info/www/bejne/bJzZip2PiZaSo68

[@Pr0ph3cy-k5z]

I can't make up my mind between buying the DSO, Hantek or the Micsig TO1104 Oscilloscope. The Micsig looks awesome. Can't afford the Pico. Great video.

[@jonsdiagnostic5879]

JackOfAllTrades hanteck is not any good

[@Pr0ph3cy-k5z]

Jons Diagnostic Thanks. That helped narrow my choices down.

[@turbobuick33]

The plug wire clamp @ 8:20, does that come with the U Scope?

[@t-dubbiedubb5028]

hello there.....I have a buick lesabre 1995 that has the same engine 3800 in my car and I am dealing with 2 misfire.....The number 4 cylinder ignition coil isn't firing at all and cylinder number 2 will sort of spark but not like consist like the rest of the ignition coils......First I tried swapping coils around but the problem didn't move at.....the coil that I thought it was bad (after switching them around) was good so my next step is the ignition coil module system.....After putting a new ignition coil control module in it I am still stuck with the same misfire.....I even put new spark plugs wires in it (since I change the spark plugs last year and forgot to get new plug wires) nothing change at all.....I even bought new ignition coil pack all three of them and the problem is still the same........I wanna know whats my next step to pin point the causes of 2 misfire that I'm trying to fix......thanks..... love your videos keep up the good work brother.

[@luismartinez4198]

have you used the GTC505? would be easier and faster to check ignition systems. sec, prim and current ramping

[@paulfiebke3909]

Thanks happy Thanksgiving

[@Ashroyer86]

This is a good video because a possible trans code is there and I've been wondering, how far do you take it with transmission codes? Do you send it to the trans shop or do you see if it's engine related. Maybe a video on how you proceed and the distance you go.

[@ScannerDanner]

I will troubleshoot transmission electrical circuits but when it gets internal, I'm done.

[@Ashroyer86]

ScannerDanner okay.

[@ChicoMds]

1:53 I can't figure out why some of the DIS ignition systems' waveform(s) look that way . Low firing lines falling that way I would truly appreciate an answer, ive been searching but havent found anything

[@Pablo_Automotive]

Thanks Paul for share this video is very informative =) Regards from Spain.

[@ScannerDanner]

Thank you Pablo!

[@turbot6592]

Would a engine burning oil and making a rich condition cause a short kv firing line on a snap throttle

[@mugsymydog]

Paul, In your book do you describe where to attach the leads for lab scope when performing tests ?

[@ScannerDanner]

I do and it will be different for the tests you are doing. Thank you! Remember, I offer a full refund on the eBook is you are not completely satisfied. You have nothing to lose.

[@oscaralarcon6695]

Hi good video 🔥So fire line is compression, flat line is spark .If I have compression or spark in my car .Am I able to see that in a regular scanner tool?

[@ScannerDanner]

Firing line is not just compression but is affected by it. And no, you need a scope to see this stuff. Thanks for watching!

[@Mr2004MCSS]

I know this is an older video but I have a question and maybe you will see it. Can these bad ignition components take out the ignition control module that the coils are mounted to? I have a 92 Cavalier with the 2.2L with this type of waste spark system and I've had to replace the ICM several times over the years. Usually I also replaced the coils and wires after the ICM went out and sometimes the plugs because I was always told to do so. I didn't know if bad ignition components were causing these failures or I was just getting bad ICM's. The last ICM replacement was last November and that one only lasted about 11,000 miles and I was running one new coil and one older one. After the ICM failed I found a crack in one of the coils.

[@ScannerDanner]

Ignition coils that are shorted can definitely cause premature module failure, as well as open plugs and plug wires, but my guess is you are dealing with shit parts. Our field is plagued by them these days. Don't buy your parts online.

[@Mr2004MCSS]

@@ScannerDanner Thanks for the reply. I think the one that only lasted 11,000 miles was a Standard brand and I replaced it with another one since they have lifetime warranties but it sucks to get stranded somewhere when they go out. I may have to get an AC-Delco one if this current one goes out though they are not cheap. I had decent luck with the Borg Warner ones years ago but I don't know if they still make them or not.

[@ScannerDanner]

@@Mr2004MCSS Standard Motor Products (SMP) is a reputable company, but these older systems, it can be hit or miss these days. Probably even with AC Delco

[@Mr2004MCSS]

@@ScannerDanner I know Standard has been around awhile since I used to buy their parts for my 1970 Monte Carlo back in the late 80's early 90's. I know a lot of aftermarket parts are junk these days so I didn't know if they went in that direction as well. On this last failure I replaced the ICM, both coils, new AC Delco platinum plugs and AC Delco plug wires. Hopefully they will all last awhile. The ICM and coils are Standard brand.

[@ScannerDanner]

@@Mr2004MCSS There really is nothing else that will cause these ICMs to fail, so fingers crossed. The only other possibility is the ground for the ICM. I don't remember if it is the housing or if it uses an external ground. If the housing it bolts to is corroded it is possible that none of these are failing and you are just losing a ground over time. Then unbolting it and bolting it back up is what is really restoring operation. I just checked a diagram and I think this one does ground on the housing. Can you get me a voltage reading on the black/red wire with the engine running? It should be very near 0 volts.

[@مهندهيرو-س1خ]

Greetings to you from the inflamed Middle East✊

[@ScannerDanner]

Greetings my friend. I am praying that one day you will see peace. Thank you for watching. God bless you brother

[@joelserrano9105]

Quick question about the spark line not increasing on the snap, if my sample rate is not enough could I have this issue on not having an spark line not increasing due to sampling rate?

[@ScannerDanner]

If you are using a time base where you are watching one ignition event, then no, most likely it is not a sample rate issue as to why you are not seeing what you want. This is because you are on such a small time base. It is long time bases where you will run into sampling issues.

[@Gagik5779]

Hello again Paul have any video about GM ignition modules like opel monerey 1995 ,a need this info

[@ScannerDanner]

This may help kzbin.info/www/bejne/o6mzlat9preKrMU

[@donaldpauli129]

It's strange watching these waveforms being looked at again. These ignition patterns were normal to use and read for diagnosis. It's almost like new tech again

[@MrJasmine32]

hi I've watched your videos about the aes wave scope. i'm thinking about getting it i know it cant do what the more expensive scopes can but will i be able to test most systems on a car that require a scope. and what else do you think i need along with this tool as a beginner trying to diagnose

[@ScannerDanner]

Get this kit. It comes with a low amp probe, test leads and secondary ignition adapters including a COP wand uScope Master Kit 1-channel automotive scope goo.gl/MFe1Th

[@seasonedtoker]

Dan is it possible to detect misfires on control O2 sensors values alone? For example, we have a wideband probe precat and narrowband postcat for control. If the control probe is periodically hitting really low numbers (like 0.1V), can this be an indication of a misfire, too? Let's say the manifold and the exhaust is absolutely leakproof...

[@ScannerDanner]

Scan data O2 values can be used as a guide, but alone? No. You can scope an O2 signal and then sync off of an ignition firing event and use that to find the offending cylinder, but this test is very difficult to do and interpret

[@seasonedtoker]

@@ScannerDanner thanks! It is actually a case, where ECU is not the best at reporting and detecting intermittent misfires becausenit constantly wanta to equalize cylinders inside the bank (it is a Bosch unit that reports a cylinder rough running parameter), it constantly reports faulty pte cats and post cats, cat efficiency... All that has been replaced twice, checked for air leaks and exhaust leaks... It always reports control probes ageing even when new. And I can see them drop really low, then normalize without the precats even reacting to that drop.

[@joopterwijn]

You say in class: “no primary coil osculation, means you have secondary coil problems”. It should be you have a “secondary problem” could be the coil, plug or cable (or combinations). Thx for this excellent vid!

[@ScannerDanner]

Agree and I have done case studies on a smashed spark plug causing this. Sorry for the mistake in my wording.

[@billyr9840]

Actually, you stopped and corrected yourself ! Happy Holidays Paul !

[@ScannerDanner]

Nice! Thanks Billy R!

[@KStewart-th4sk]

Why post this when he already corrected himself???

[@OzMechanics]

hey Paul . just seeing if you want an Oz Mechanics shirt. gave them out to a couple of youtube tech just seeing if you would like one.

[@ScannerDanner]

Heck yeah I'll take an Oz Mechanics shirt! Email me at [e-mail] or if you already have my personal email and I'll give you my address. Thanks buddy and Merry Christmas

[@OzMechanics]

ScannerDanner just sent the email

[@markcookson3519]

time :34.29 its actually back emf that your seeing as on oscillation rather than reserve energy its actually wasted energy as it is not big enough to produce another spark

[@rubenalfonzo33]

hello friend I congratulate you for your support in the video and I write to you from caracas, venezuela I have a dokota V-8 2912 automatic I have a fault my trasmission "does not back off, but if it starts well

[@jesusmalagon4336]

Thanks paul Danner

[@ScannerDanner]

Thank you Jesus Malagon! You have been following me for a long time and I am very grateful.