A Closer Look At A Coil On Plug Mis-Fire
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- เผยแพร่เมื่อ 31 ธ.ค. 2015
- We all to often (myself included) over look opportunities to further our skills and learning. Lets take a closer look at a routine repair in the shop (bad coil swap out) and see what we can learn from it.
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--Eric O.
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Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair 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 South Main Auto Repair, 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 South Main Auto Repair. - ยานยนต์และพาหนะ
The best explanation with details at the electrical physics level I have ever seen on UTube. These two guys are well versed in ignition diagnostics and excellent at teaching the concepts and circuitry of an ignition system. They both should be at a votech college teaching. Great team. A+ from The Professor
Love Ivan walking in and you two geeking out over wave forms. Still a great video.
The two of you get together and all hell breaks loose!!!
The board part was a hit!!!! Genius!
Do more like this.
Really good video! I currently have a P0300 'random misfire on multiple cylinders' in my trailblazer. The previous owner gave me a box of OEM coils, he had the same issue at some point it seems and didn't know which coil was bad so he replaced them all, the box has both the good and bad coils in it, now I can test them to see which is bad and which is good. I did do the old unplug each coil in turn at idle to see which coil(s) had no effect on idle performance and the #2 cylinder seemed to be the issue, I swapped that coil with #3, the problem followed the coil so I know the coil is the issue. If I can find a good coil in the box he gave me I'll be set without having to buy any parts. Money is really tight right now and you may have just saved me quite a bit. Thanks!
You both did a fantastic job! I’m 67 and taught electrical theory and hands on at a motorcycle school in the early eighties. We did not have all the sensors and ridiculous smog applications. Retiring, I went back to motorcycle repair and high performance porting with a flowbench and do my own boring and valve grinding. But when I could not run diagnostics on a particular Harley-Davidson, I decide to get software oscilloscope for my pc. Now I’m trying to learn the use of the Hantek. Thank you both for going through the reasons and testing the component, instead of just replacing the part. Very informative, my new best “subscription”!
im gettin addicted to these videos. hes like eric the car guy and scanner danner all wrapped in one.. epic!
Eric O and Ivan's Auto tech school.....Excellent video, really nicely done, guys.
This is the only video I found which really let me understand how coil on plug works and how they can fail. Wonderful video indeed! Please keep doing these videos as they are unbelievably helpful. Thanks, thanks, thanks....
Hi from Australia. My Toyota with 5vzfe had a bad misfire with unburned fuel smell. I watched this video and learned how to test the coil packs. Pulled each coil and found number 3 had half the resistance of the other 2 on the secondary side (waste spark ignition). Swapped in a spare for the old number 3 and as you would say Mr O. "bada bing bada boo" - misfire gone. New coil on order. Thank you for your channel, I am very grateful to you.
The two best mechanics in one place ! What a new years gift !
My dad told me,every year they build a car ,they make it more difficult to fix,but if you remember your basic diagnosis techniques,it doesnt matter how fancy it is,they all still work off the same basic principals. I agree with him. A test light can find more problems than any fancy computer on the market. Cars still use the basics to run,that has never changed. Granted,things have gotten more complicated,but using basic problem shooting techniques,even on the newer cars,you should be able to track down any problem.
You two should do these type videos more often together. Listening to you bounce ideas back and forth between each other really taught me a lot. Very interesting video!
These two work so well together they should get engaged. Fun to watch these master minds doing their thing. JUST KIDDING GUYS, ONLY WISH I HAD A TENTH OF THE KNOWLEDE BETWEEN YOU. Great instructional.
Another great post, thank you Eric, Ivan and Hanna.
This is really an exceptional video. Great combination of engineering and practical knowledge. Thanks for sharing your wisdom.
The simple white board and visualizing the ohm readings made this highly effective training. Good Job! An example of why this works; as an aircraft mechanic F-111 at the time, I had a senior mechanic ask me an assembly process, I knew him to be an excellent mech., with 28 yrs exp. I started to explain at first, but decided it would be better retained if I took him to the book instead. He started fussing that a verbal would be fine, when I had the book open, and I noticed he wasn't paying att. I realized- he could not read. He was 60yrs old and had been doing a great job for years through visualization association retention :) Pelican
This has been one of my favorite S.M.A. videos! I really appreciate Eric (and guest Ivan) taking the time to explain to us how these systems work.
Great breakdown of a diagnosis and theoretical explanations. Don't know if many automotive guys appreciate this but I sure do! Thanks!
Fantastic video, I love the dissection of the problem.
Thanks for thoroughly exploring and explaining everything from start to finish. Most videos leave viewers with questions unanswered. Not the case hear at all. It was beneficial having two experts explain as well.
Thankyou Ivan and Eric O for the "Technical Detail" with a failed coil.
Great Video!
I have viewed many videos on scope patterns and techs explaining them, but yours was undoubtedly the best in putting it in laymans terms that I can understand lab scope usage. I have been looking into a lab scope again I have used them in the past ( ie snap on vantage ) but had problems getting the right pattern, even with the help from the scope and of course diagnosng the problem wrong so I just gave up and tried other methods. My wife and I own our own repair shop been I business for 16 years. I do like the diagnostics it is what I have been doing for the last 30 years but being by myself I don't always have the opportunity to go to classes on the new and fastly changing systems of these vehicles, so thanks for the videos keep em coming!
I had a great time watching this. It's awesome how you take such a redundant issue and make learning about it so much fun and entertaining.
Great job guys!!!
I learned on a picoscope, and use it for A lot of my diagnostics. everything from blower motors, lights in the instrument cluster, is all pulse width modulated, communication issues, checking time of an engine all needs and can be done with a scope to save a ton of time and accurately diagnose a vehicle. Coming from a dealership for the past 6 years, its amazing how many people DONT use it. Nice to see it being brought out, and sharing some knowledge bombs! Keep it up!
Ivan and Eric: The Warriors for Truth!
*Great video. Probably the best automotive video on TH-cam. More whiteboard would be awesome.*
Man you have no idea how happy this video makes me. Two techs geeking out and for also very geeky viewer to watch and enjoy. Please more geeky vids like this please.
Big thumbs up! Great walk-through to explain pri:sec relationships and flow back to neg batt. And ohm check validates also. Great video.
This is why I love watching yours and Ivan's channels. I love electrical, as much of a headache it can be, but I always learn something. I work for Chrysler and trying to move to the back and would love to have the Verus when I do. Alas, they're horribly expensive though a major asset
Great stuff! It's cool seeing you two going through this.
I love it! Someone who not only finds the problem but is curious as to why! When you 2 get together there is going to be good timesThanks
Eric, great video, lots of deep info ton follow. Thanks, if you can do it, I can watch. Special thanks to Ivan, watching you two talk through the condition was super. Thanks again.
Ivan seems like a great guy! Appreciate the mental gymnastics and you two bouncing ideas and explanations off each other. This shows how a real tech works and the brains and analytic prowess it takes to be a good one and not just a wrench turner.
Great video Eric and thanks for Ivan's input as well. So interesting to see the scope patterns of the misfire as opposed to a good one, and the simple ohm test on the coil to confirm your diagnosis. Many thanks--superb.
Excellent teaching! Thanx, guys.
Nice demonstration guys..very educational !
I apprecited so much the drawings and explanations on the white board.
Thanks for your efforts guys.
Blessings for you guys !
👍😎
Pretty awesome having Ivan there asking questions that we may ask. Different from most of you videos but as usual it was well worth watching. Thanks Eric O.
Hello .
I have been watching both of your all channels but individually it is so nice to see both of you together with not envy from one to another.
Buenísimo 👍🏽
Wow, that was so cool and it is true that 2 heads are better than one, at least in this case. Ivan was able to fill in really well. I especially like learning about the return voltage, albeit so small returning through the ground. It reminded me of when I made pellicles at DuPont that were basically used as dust covers to etch circuits on chips. This process was done in a clean room with this solution called nitrocellulose that was only viable when the temp was between 68 & 72 degrees and the humidity between 38 and 42. The solution was dispensed on a plate of glass spinning at a certain rate which varied depending on the specific pellicle. That was in the early 90's and we were down to only being able to have sub micron particles which was the largest gap on the chip where the circuit would still function. That process may now be obsolete with the size of the chips getting smaller and smaller. Thanks for sharing.
As soon as Ivan pops in I got the Sanford and Son theme in my head.
You guys are awesome. Always love when Ivan joins the fun!
Awesome to see shop tech understanding waveforms viewed on the scope, from my servicing days of radio/tv you can call those oscillations seen on the scope "ringing".
Very educational Thanks Ivan and Eric
A conversation between two genius’s....
Eric O... Older (get-r-done) Jedi Master
Ivan... Younger (analytical) Jedi Master
You two are fun to watch!
thanks!
+Max that makes scanner danner yoda
Echowhiskey Absolutely!
Thank you, that was super informative! And it was great to see the two of you working together. Y'all make a good team.
O yeah, nice whiteboard work! 😉
Great video on board explanation.thanks guys
Great job Eric and Ivan. Keep me coming. Thanks
In a one week gap since your last video, I scrolled back to watch this classic one again. Brilliant review, even better after a few years. Many new COP systems don't give easy access to the secondary or to the switch side of the primary, so this is harder to analyze with modern designs. If you ever get a free moment, an update regarding how you investigate those systems (with the transistor inside the coil pack) would be helpful. Happy New Year, Eric!
Very very good video!! The white board made things very clear for me. Thanks guys!!
Hey there Eric, this was really great video. It was great just listening to you guys collaborating on this diagnosis. I know guys are flat out working, but you guys make a great team for these videos. Your explanations were easy to understand and informative.
HEY! Having Ivan walk in to South Main during working hours is kinda like Eddie Van Halen doing a surprise visit to the Letterman Show!
Thanks for doing all that to teach us !
You guys are GREAT together Iam sitting alone with a smile on my face.. Happy New Year Eric and Ivan .
I'm having a problem with my traverse and I Remember this video from a few months ago and now watching this again I'm gonna go test my coils to see if I have a problem. damn I love this channel, double thumbs up!
Love all the Rockauto magnets! Another well done video.
Good explanation. This all started with radial aircraft low tension ignition. There were many "experts" then reading the patterns. Most would call out "plug, lead and coil"
Eric. Great explanations from you and Ivan. Very instructive - well walked through. Having worked a great deal with 4 channel scopes, etc., it sure brought back a lot of memories. The only difference for me, was I was able to make small adjustments in order to really "clean up" a wave form, mainly amplitude and pulse width, etc. This was on an old Bendix Weather Radar, on USAF Aircraft. Its pulsed output was 65KW, and it did this 400x a second. :) Loved working on that RT!
Again, super explanation by you and Ivan. You two obviously have "it together" - really well! Only comment about current flow - for me, always neg to pos. Well, there is "Hole Flow" in certain transistors - Positive Holes - love that concept. :)You are really educating me - thanks a million.
Excellent tech. I had a ford triton 5.3 in a truck same issue. I fixed using fluke ohm meter. Compared all coils found one out of spec when hot. Goofy shop charged me to change all plugs didn't stop problem. So I troubleshoot it old school. Remember physics class(I am engineer) current goes from negative to positive and collapsing electric field always induces a magnetic and collapsing magnetic field induces an electric current through flux of iron core.
Cool seeing Napa coil from anywhere but China. Next snap on will make stuff there...lol..Good show! Thanks שלום
Excellent work guys!!!
You two did an excellent job together. Hope to see you both do more videos together...
This is exactly what im talking about and why i have changed my direction and approach this year. I mean, Im gonna charge the customer 1hr usually anyways or somewhere around there. Swapping the coils takes about 3 minutes out of my life and the way of life for 16 yrs now for me but knowing is what its about. Right on brother.
HAPPY NEW YEAR! Thanks for another great video. You guys keep up the good work.
Wow! That was a very nice video. Great explanations on terms and what things should look like. I like that you are doing your thing and then you had an unexpected issue happens. It happens to many people and it can be discouraging…. I just change my spark plugs and now I can’t get the truck to idle/lose of power.
Thanks for the new video and happy New years to you and your family....
Good video from the dynamic duo. I liked the info about grounding the coil I've never heard that.
Absolutely awesome video. Thx.
Great info guys! Both guys are smart!
Good video with the theory on the coil and wishing the both of you a Happy New Year!
I got all excited for a minute as I thought the both of you would go on about the waste spark system like in my 2000 jeep xj. The coil bar is a bit of a different animal. Great video all in all. Happy New year!.
Video looked nice and clear as I watched it. Good vid Mr. O
+steve hall It is still rendering, YT is being a bit slow today, it will be 1080P HD in a few hours I would imagine.
Great video, you guys work well together, the questions and explainations from the other guy works very well with your teaching, definatley the way forward.
+scon2006 Thanks!
If I have to do a misfire diagnosis at work I, like you simply switch the suspect coil to another cylinder and replace the coil if the miss stays with the coil and the car is out the door but it's interesting to know the way the coil failed. Years ago we tested the primary and secondary resistance of a single coil but it's too easy now to just test the COP coil in another cylinder. Nice job guys.
Cool work both of you and its info well used and saveing the wave forms is a good idea to help in diagnosing
HI, IVAN! GREAT job!
Great video. I really liked the white board explanation. I'm always using my white board to explain things to the wife. I'd like to see another video like this.
One of your best ever. Thanks
Another great video. I was great to attach a face to Ivan whom you sometimes mention in other videos. My favorite thing is when you say "that's your problem"..you do it with such authenticity, as if you learned it from your father when you were very young. Thank you so much for the videos.
Great video as always! If we put you two guys in lab coats and hang a chart on the front of that truck and you might as well be two electro cardio surgeons discussing a patient. I am sure to the non initiated who do not turn wrenches it sounds exactly the same. Heck I do wrench and know what's up and it still sounds the same! Dr. Eric and Dr. Ivan lol. You guys are incredibly smart! I learn tons of stuff from you and your videos. Anyone who bitches about why getting your car fixed needs to tune in and watch the processes that take place.
A very good class keep on teaching, go bills
Great video!
Happy New Year to both of you and your families!
Awesome awesome video and detailed explanation thanks so much
Great video Eric, I really love learning about this sort of thing. I'm not a technician and therefore have never learned about using a scope and reading waveforms but I find it very interesting. Guys like you and ScannerDanner are great teachers. I had the opportunity to meet Paul Danner this summer and he is as smart and awesome as you'd expect.
Whoa bonus SMA video having Iven in the shop! Nice video guys! Cheers!
Thank you for sharing that. I learned something today. You guys are awesome.
+Jared Mance Thanks
good video thanks for sharing your knowledge with us
Re: the ringing on the open circuitI haven't read all 410 comments, so this may have been covered. There is a capacitor across the switching transistor in all the electronic ignition circuits I looked at, this with the coil and its DC resistance forms an LCR circuit, so if the energy is not dissipated in the spark it will be stored in the inductance of the coil and the capacitor and will oscillate until the energy is dissipated in the resistance, so the circuit will have the ringing on the scope with an open secondary.Excellent video.
nice description.
Awesome, learned some cool stuff, Like that Snap~on digital scope...
Another great video. Thanks for the walk through on the scope. Just learning. Oh and Crazy Ivan in da house!
Old video, but still totally excellent.
Thanks mates...its really refreshed my memories. I'm from Singapore, a place cars are difficult to own, costly to own😭😭😭😭😭.
Hey, you guys ever listen to Click and Clack, the Tappet bros, from the N.P.R. radio show?? You remind me of those guys going back and forth about car repairs!! And being humorous, while also being informative! You two make a great team!!! Double thumbs up, if I could!!
+roadkill5333 Haha a viewer sent me an older CD of them guys, they are great :)
fascinating thank you chaps
Hey I just been watching like every day! You guys are awesome down to earth people that you don't see every day. I am a dodge ram 1500 man and I haven't see to many vids on them. Just because they don't break down like the foreign car do lol.
Absolutely excellent video Eric. I too have been guilty of just swapping coils. But it's was nice to poke the ol brain power and make myself think and learn more about the function and theory. I'm hoping to be able to pick up a scope soon. Keep up the good work and may the new year bring you and your wonderful family Many Blessings.
Happy New Year to You and Ivan.
Great video!!! I myself not knowing the tech part of an ignition coil with the workings of the surrounding components was lost 20 mins ago. My 2009 M3 I bought (68,000 miles) 9 months ago ran like a champ until yesterday (79,000) when I jumped on it entering the FRWY paddle shifting it down to 1st (7 speed double clutch AUTO) 7,000 RPM hitting 2nd at 8300, and dropped off the throttle at 7000 before hitting 3rd (I'm already over 80mph but it is CA) only to immediately notice I've lost power. Today on a meter it shows 6 of 8 cylinder problems. I had picked up new plugs today knowing after a little research they are over due, and now after viewing your video I believe it's very possible I blew 6 ign coils. Ouch! Thank you for the great info in layman's terms!
The E90 M3 with the S65 did supersede to a new coil number in Sep 2009. I'm pretty sure from a Bosch to a Delphi. There is a SB on switching from Bosch to Delphi in almost all models
History has been made----the white board has come to SMA.Great video and real good white board info. Hannnah was part of this diagnosis---acknowledge her input and let her say hi to the viewers.
+Tom OConnor I have had the board for over ten years , just never used it in a vid :)
+South Main Auto Repair Do you clean it with Brake parts cleaner? ;)
+Iam D lol actually I do, carb cleaner if the kids get permanent marker on it haha
+Tom OConnor Hey Tom did you miss the SMA Hyundai Tucson case study earlier this summer? The white board was out in full force on that one!!
motoYam82 That's right, I think you went full geek on that one haha well ok maybe only half at that point.
This video was great. Know I have seen someone who has more Rockauto car picture magnets than I. I checked out the two locker doors in the back ground.
+Pete Miller that is 1/8 of the collection haha
LMAO Eric!!! @ 16m.44s "It comes back & punches the primary coil in the face". Nice Video guys, loving the 'Ivanostics'