You are making a lasting impression on me as a technician, I know you are touching the lives of your students. Thank you for continuing to share your knowledge. You always explain everything so clear and precise, while going through the complete diagnostic process. No shortcuts mean less room for error in diagnosing the real problem. You also tend to keep the attention to all with positive and clear information. Thank you for all that you do to make the diagnostic world a better place. Years ago no one wanted to share information and it was as if information was privledged, and it pushed a lot of young TECHS away, you are changing that and changing the lives of people by sharing your knowledge. You will continue to have blessings by blessing others, keep up the great work.🙏🙏🙏👍👍👍
@ScannerDanner
2 жыл бұрын
Thank you Shawn! Made my day
@cosmo7816
5 жыл бұрын
This is one you tube channel i could watch all day, I would have loved to be able to afford to a tech collage with that kind of instructor
@trevinmartin6149
4 жыл бұрын
HE IS TRULY AMAZING
@bigb420
Жыл бұрын
10 years later this has helped me tremendously diagnose my 2003 4.6 ford. Im 10 years late lol but thank you! Great explanation. Only helpful video i found that actually broke it down.
@ScannerDanner
Жыл бұрын
Great to hear! Thank you so much
@davidbellmechanical
9 жыл бұрын
Very smart to switch the #6 coil driver to check the coil. As you say, better to re-fry a bad ecu rather than potentially ruin a new one. Really informative, a very valuably 35-odd minutes well spent.
@ScannerDanner
9 жыл бұрын
+David Bell Thanks David
@PineHollowAutoDiagnostics
10 жыл бұрын
@26:10"We've got some major problems here." haha classic! Keep up the great videos Paul, I think this is the best one on dissecting primary coil current ramps.
@arcadiogalindez6407
2 жыл бұрын
let me start by saying thank you from the bottom of my heart... i just did my first diagnostics on a 06 ford f150 5.4 with a no start.. worked on it for 3 weeks and today finally i got it ...i almost cried... tears of joy of course.. but your videos are really priceless just to know that there is a master out there to guide you step by step and instill a new way of thinking and good habits is just a god sent ....well after the snap-on d10 and a 4425a picoscope along with the shop key its time to sign up for some classes i'am all in.. hope to see you soon ..thank you ..
@ScannerDanner
2 жыл бұрын
Looking forward to hearing from you! Thanks so much
@SimplyDiagnostics
6 жыл бұрын
A great video Paul, perfectly shows the reason why we have to ask ourselves what is cause and what is effect.
@ScannerDanner
12 жыл бұрын
Thank you very much. It always means a lot to me when this kind of comment is coming from another professional.
@danielx7922
4 жыл бұрын
You're the best Engine performance Diagnotics teacher I've ever seen Danner 🤘 Thank you. Best wishes for you
@ScannerDanner
4 жыл бұрын
Thanks man ☺
@trevinmartin6149
4 жыл бұрын
my company been in business for 54 yrs i bought 2 sunnen and 2 allen machines and have snapon verus pro and have learned more off u channel and book , u taught me on snapon computer ive sold about 15 comp. for snap on. u should get some kind of kick back from them only reason they bought them is because of my knowledge that ive learned off YOU TY SO VERY MUCH ,,,
@docb4373
10 жыл бұрын
After having my 2000 Expedition in 4 different shops telling me it was the Mass Air Flow sensor, the Intake Air Temperature sensor and the O2 sensors that needed and were replaced along with the injectors, COPs and Iridium plugs.They also did a compression check and found that the average cylinder was 155 lbs compression. After all this I still have the same code PO 354 on G or #7 cylinder. Your video is the most informative explanation I have seen or heard. Thank you. I was just about to take my truck to the scrap yard thinking I had french toasted the engine. I recommend anyone that is having a ignition problem to see this video. Again thank you.
@ScannerDannerPremium
10 жыл бұрын
So what was the fix? These Fords will misidentify which cylinder is misfiring too.
@docb4373
10 жыл бұрын
UPDATE: Number 7 was miss-firing due to driver transistor burned out on "G" Replaced with Motorcraft remaned PCM for a 169.00 bucks. Thanks for the insight that none of the other shops found this problem, including the Ford dealer. *OPPS* No more incidents so far. Thanks again for the insight.
@docb4373
10 жыл бұрын
After the savings I ordered a bran new Nex IQ Prolink on E-Bay Look forward the the next glitch that you might be able to steer me straight on with my new tool.
@ScannerDanner
10 жыл бұрын
David Beller, MD. no problem, thank you!
@johnallen7367
4 жыл бұрын
Greetings from Australia. I had an identical problem on cyl 8 on a 2002 explorer 4.6. Faulty coil took the driver. Without anything approaching your gear i came to same conclusion. My early training was as an airforce technician, but i rate this video as one of the most logical, informative videos ive ever seen. Thanks.🇺🇸🇭🇲
@ScannerDanner
12 жыл бұрын
The coil shorted out from a number of factors which in this case, no amount of preventive maintenance would have helped. Heat, vibration, and coil design would be the culprits in this case. As for the PCM, as I showed in the video, the shorted coil cooked the PCM driver. It needed a coil and driver to fix the #6 cylinder misfire.
@fmbfla
5 жыл бұрын
great vid jay-o On all misfires on FORD products I use a noid light on the coil harness first to determine the driver/PCM is still working and not making Purple smoke. A bad coil or Boot can run hi voltage back to the PCM destroying the Driver for that coil. Flash from Noid Replace all Coils and plugs DONE! No flash from the noid , replace PCM and all coils and plugs. Reprogram PCM DONE! 10 minutes max to diag.
@ScannerDanner
12 жыл бұрын
Sorry I forgot to add my web address in the video. I cannot put it in here but search Auto Computers Troubleshooting d o t c o m (no spaces, all small letters) If you like, you can fill out my comment section and I will send you more info. about it. It is an Ebook with instant access after the purchase.
@ScannerDanner
12 жыл бұрын
Watch my other Ford COP misfire video. Check your Mode 6 data for your misfire counters. I show you how to do this in the video. Any generic scan tool will give you this data.
@ScannerDanner
12 жыл бұрын
there are limitations to every piece of equipment. you will not be able to do everything i did in this video without a scope. coil failures are common. if you feel a dead misfire at idle or all the time then go after your misfire code first. if you feel no misfire then chase your lean code first
@StumpyVanLife
12 жыл бұрын
I can not thank you enough for taking the time and effort to post these videos. It is obvious to me that you really know your stuff. In the past few weeks I have really learned a lot by watching your videos. I am a professional technician (ase master and L1) so this information will transfer to good things for me and my customers. Thank you one more time. Please keep up the good work. I am sure you are making a lasting impression on your students.
@ScannerDanner
11 жыл бұрын
Cool man! I used to drive past there all the time on my way to Penn State to visit my younger brother. Looks like a nice campus. Did you guys get to work on live jobs? We take in all live work. I wouldn't want it any other way....I hate "make believe" problems or "bugged" cars Anyway, glad you liked it and thanks for the comments
@ScannerDanner
12 жыл бұрын
Why do you think I should watermark them? So people can find them better or to protect me in some way? Thanks
@ScannerDanner
12 жыл бұрын
Good idea, and I thought of it, but this is a sealed unit. It could still be done but not without butchering the housing. Not to mention the goo that probably covers the entire board. What do you do with that stuff? Do they make a solvent?
@joshhargis3119
5 жыл бұрын
Thanks to your video i was able to save myself $700 a shop wanted from me to replace my ignition wiring harness and computer. Thanks and keep up the great work!
@lanceair151
7 жыл бұрын
Mr Danner, I realize this video goes back a year or two, but I just want to say your Pico presentations are outstanding and exactly what I have been looking for during my research of Pico systems. I have been in the auto and aircraft repair trade and vehicle manufacturing business (autos and class 8 trucks) for over 30 years now and looking to upgrade my scope to something far more capable. Thanks for sharing your knowledge.
@TheSaluki1282
Жыл бұрын
You are an excellent teacher bro. It would be awesome to apprentice you or even sit in on your meetings. You made everything extremely understandable. Keep up the good work.
@ScannerDanner
Жыл бұрын
Thank you! If your interested I have over 540 more videos on my website with over half of them of me in the classroom (like on this one) www.scannerdanner.com/join-scannerdanner-premium.html Hope to see you there!
@ScannerDanner
12 жыл бұрын
I cannot post the link in here but search scannerdanner d o t c o m on line. or I have my website listed in all of my videos. thank you for your interest!
@ScannerDanner
12 жыл бұрын
Good question, the wire issue you mentioned was addressed in the voltage waveform test of the #6 coil control wire at the PCM. The #6 coil control wire showing battery voltage at the PCM showed the integrity of the wire from the coil to the computer was fine.
@jamesbond7790
5 жыл бұрын
Dan thank you for your help your videos have saved me, my life would be so much different if I learnt from you and I would probably still have the use of my right-hand when I started my trade the mentors treatment towards anyone with out a trade certificate was disgusting and as a result I lost my right hand function from a safety switch removal because the company refused to buy the correct tools for the job instead decided to modify the equipment I'm 6 surgery's in and 3yrs later and still have one year left on my time needed to complete my Trade. I have been following your channel only for a few months I have learnt more from you then I learnt in my total time working and studying I want to pack a back pack and Rock up on your door step to complete my Trade you are truly the best in the trade. I wish I found this one last week on a stressful job I took on to pay my rent thinking it was easy money jezz I was wrong and it was my first job back at work since I lost my right hand movement. I had a intermittent fault in a S13 ING system and it was a doozy once I repaired the hack job on the loom I lost ING firing the trigger signal for the MOSFETs was lost completely the firing signal was generated by a signal short to ground and was the original issue with the car causing it not to fire at the right time this video has given me the complete understanding of how to repair any car with this issues
@movingupautodiagnostics8645
7 жыл бұрын
Wow, this video is just what I needed to understand ignition waveforms. You even took the time to explain scope setup and test the coil. You're just great.
@ScannerDanner
7 жыл бұрын
Thanks man! Shalom
@rickw.9298
4 жыл бұрын
5 star tech & presentation, great candidate for a top 10 series.
@RadialPen6262
5 жыл бұрын
Great video! great diagnostic methodology. learned quite a bit. Now off to garage to play with my lab scope...controlling primary windings directly through the computer with hard connections is a good way to cook internal pcm drivers in the event of a shorted primary winding. Its no wonder manufacturers like Toyota to give ONE example integrated this circuitry into the coil itself with their 4 wire ignition coil eliminating currents into/out of expensive computers.
@spelunkerd
6 жыл бұрын
Another brilliant case study. This is all making sense now.
@ScannerDanner
11 жыл бұрын
Where are you located?
@ScannerDanner
12 жыл бұрын
Thanks Craig! You will not be disappointed. Remember it is an eBook, not a book I send to you. You will have immediate access after your purchase. Thanks again Paul
@ScannerDanner
12 жыл бұрын
What model and engine?
@ScannerDanner
12 жыл бұрын
Thanks man! I will look that up. I truly wanted to fix this one. I even had a used computer for this truck that I could have taken the transistor out of. Just didn't want to butcher it.
@Gmansour1971
7 жыл бұрын
I bought a verus Pro, an older one that I'm thrilled with because of your videos. My next purchase will be a Pico.
@ScannerDanner
7 жыл бұрын
Awesome! Thanks for following what I am doing!
@SIUAutomotiveVideos
3 жыл бұрын
Amazing video. So well explained. We have a 5.4L in the shop right now with a similar concern. I've taken notes and we are going to run some of your tests. I sent a link of this video to the students, who will prepare for Thursday's class. Thanks again!
@PineHollowAutoDiagnostics
10 жыл бұрын
05 Jeep Liberty 3.7 V6 with a P2311-Ign Coil#4 Secondary ckt. fault. #4 driver in the PCM was toast; did exactly the same scope test you did here at the PCM! Spark plug was so worn, looked like the spark was making its way down the ceramic at some point. Then using the #2 driver, the #4 coil primary current ramp showed a classic shorted SECONDARY winding. In the field have you ever seen a coil with a shorted secondary (not primary) winding cook a driver? Maybe the PCM was increasing the dwell time to compensate before it bit the dust?
@ScannerDanner
10 жыл бұрын
I have not seen that. It has always been the primary.
@bruceb8686
4 жыл бұрын
Boss man, this is better than watching tv. Plus it helps me with car trouble. Thanks
@ScannerDanner
4 жыл бұрын
Glad to hear it! Thank you
@alabalanutnbolt
11 жыл бұрын
I discovered we had a picoscope at work the other day it lives on top of a cupboard in retirement. but now that sonofabitch is coming out of retirement. its gonna get used and after this video its going to have a bash on the Mazda rx8 coil set up as soon as one comes in running crap as they do. thanks for the instruction, it was really informative and easy to soak up into my old brain. cheers. #
@mariocorona6836
10 жыл бұрын
Wow ! I read all the comments....lots of them. I really like your teaching style. Been watching ur videos and been learning a lot. Thank you for the time you take to make quality helfull and easy to follow videos.
@ericrenner82
8 жыл бұрын
for a free video very informative for me. i have many years in the automotive and airline industry as a mechanic but never fully utilized a scope. I am looking into purchasing a decent scope and learning how to fully expand my knowledge electrical diagnostic and troubleshooting. local snap-on dealer recommended your channel and I'm utilizing all your videos. soon will subscribe for more in-depth videos thanks Dan
@ScannerDanner
8 жыл бұрын
thanks so much!
@elijahhena3143
3 жыл бұрын
Damn this dude is smart I literally could watch these all day
@ScannerDanner
3 жыл бұрын
you are in luck! I have about 600 more here on KZitem and another 450 on my website :-) Thank you so much
@elijahhena3143
3 жыл бұрын
@@ScannerDanner my wife got me a picoscope for Christmas I'm learning more about your videos have alot of good information thank you
@ScannerDanner
3 жыл бұрын
@@elijahhena3143 that's awesome! You have a great wife :-)
@ScannerDanner
12 жыл бұрын
A shorted plug will not overheat the coil, an open plug will damage (melt) the coil insulation though. As for the PCM driver, there is always the possibility that the driver is shutting down however that was not the case on this one. One way to verify driver shut-down or just a bad driver is to clear the codes, then restart it and see if the driver turns on before the fault. Another way on Fords is to run the KOER test. During this test any coil being intentionally turned off will turn back on
@ScannerDanner
12 жыл бұрын
The truck is fixed with a couple new coils and a new ECU. The one on the floor of the truck needed reflashed (had to send it out as I do not have reflashing capabilities...yet) for the anti-theft system before it would run the truck. Thanks for the compliment on the video! I am glad you liked it.
@ScannerDanner
11 жыл бұрын
Thank you! Unfortunately most shops do not do troubleshooting at all. Maybe 5-10% of them do use proper methods. A good place to search for one is on iATNs shop finder.
@ScannerDanner
11 жыл бұрын
they do and it is part of the transistor circuit but it cannot protect forever. Eventually it will cook it. I have a case study in Section 22 in my book on a Chrysler C.O.P system with a shorted coil that ended up frying the driver even though it had current limit protection. This is why you should never continue to drive a vehicle with a constant misfire. I could cost you big time.
@xerxes456
9 жыл бұрын
Great video as always, my thought is if it is possible to ground the coil driver external bypassing the PCM. Thanks for helping people I have ordered a Pico now, it is overkill for me but I do not trust the part changers they make it expensive so I do all car problem my self and you helped me understand trouble shooting with a scope possible. Thanks Danner for all your dedication for Automotive learning you will save money for ordinary people when your students get out in real life and work with cars.
@ScannerDannerPremium
9 жыл бұрын
Thank you my friend!
@daniel3190wells
8 жыл бұрын
+ScannerDanner Premium This is the same question I have . A couple of months ago I was diagnosing A ford escape for an IAC TC and related problem and I narrowed it down to the ECM driver for the IAC but I wanted to test the circuit for surges or spikes such as the one that you found on this vehicle. Would it be possible to manually ground a suspected circuit to eliminate any possibility of damaging a new ECM.? I would be afraid of back probing a circuit While its running that it might short the ECM. I too am considering purchasing a PICO Just because of situations like this and others.
@robinhood1188
3 жыл бұрын
So true. A lot of coils measurements within spec but still contributed to engine performance. Happened when warm up and under load
@jaychry
12 жыл бұрын
I am curious to see how u guys replace that PCM. What are the key procedures for replacing a bad PCM ? Any precautions?
@johnf6687
5 жыл бұрын
jaychry some have to be programmed even from the junkyard or flashed when changed or the vehicle won’t run right
@ScannerDanner
12 жыл бұрын
For a "type-A" or severe misfire, the PCM may shut down the injector, however not all systems do this and the ones that do will never have the injector disabled on start-up and I believe at WOT. Almost all cars/trucks are ground side switched for both the coil and injector. Most common failed driver is hard to answer but it is probably the coil driver.
@JoelAutomotiveInaction
11 жыл бұрын
Paul, when you are explaining about when the transistor turn on 16.27 there are 2 downwards line when the transistor turn off ,magnetic field collapses is that some thing normal or is that secondary bleeding to primary some thing I will have to worry about?? thank you for sharing your knowledge with us, you are a excellent teacher . Those 2 down tum probably are coming from parts changer or repressed teacher some one do not understand what you are teaching, is pure gold!!!!
@irench
5 жыл бұрын
Great to see technicians that think as I do. I get many a shop who "doesn't do well with electrical" and replaced all the pattern and obvious parts but can't resolve the issue in this case. The aggravation is that they lap up the gravy and then complain about paying for diagnosis which they didn't charge for or don't get a bone of. I admire your set up. Many would say well just charge them. That would be nice real world but all the cheap shops, mobile mechanics, and google/youtube certified technicians have ruined the profit in diagnosis to the point I am going to do a Goodyear at my shop and only do brake and suspension, no need for exhaust I live in AZ.
@ScannerDanner
12 жыл бұрын
They are all important, but I would say the ECT has more effect on the fuel curve than the TPS does. In particular during a cranking and warm up condition. Once the engine is hot though I would say the TPS has more effect on fuel delivery. (mainly accel enrichment and decel fuel cut-off) Of course the RPM and MAF data is critical all the time.
@ScannerDanner
12 жыл бұрын
One more, on this system the coils will not be shut down during a cranking condition. So what you would see on the scope is a very high ramp (from the shorted coil), then no ramp as the PCM shuts the driver down.
@transfixleo
4 жыл бұрын
So did the previous shop already replace this coil? Or did they replace the wrong one? Or did they not trust going any farther....?
@reallifefootage4kdrone706
10 жыл бұрын
I'M HAVING THE SAME ISSUE BUT ON CYLINDER #8 P0358, I HAVE NEW PLUGS AND COILS I CHECKED THE FUEL INJECTORS AND ALL ARE GETTING SIGNAL BESIDES #8. YOUR VIDEO REALLY HELPED A LOT! MY QUESTIONS IS WHAT WIRES ON THE COMPUTER DO I HAVE TO CHECK TO SEE IF ITS THE COMPUTER NOT SENDING SIGNAL TO #8
@ScannerDanner
10 жыл бұрын
Not sure man, you need a wiring diagram. Go to Mitchell 1 DIY, you can buy a pass for your vehicle for very cheap
@camerontechstuffs
Жыл бұрын
I appreciate these videos alot. I'm working on diagnosing no spark on all 8 outputs on one of these 5.4 pcms. injectors fire while cranking but i cant get any coils to fire. Very strange to me that all coil drivers would fail and leave the rest of the pcm totally unaffected.
@ScannerDanner
Жыл бұрын
That is strange, especially because you have injector pulse! If you have injector pulse, you should have everything that ECM needs to fire the coils. What is coil positive voltage DURING cranking. Very important that, that circuit is loaded
@paulfiebke3909
4 жыл бұрын
I bought a amp clamp, but im afraid to use it because i never used one. And i can't find out how use it properly, keep up the good work
@ScannerDanner
4 жыл бұрын
You will never hurt your meter or your amp clamp by using it wrong. It produces voltage in the presence of a magnetic field. Thats it! I have a ton of videos showing the usage of it. Stay with me and ask questions and I'll do my best to answer. Oh, just don't hook it up to a plug wire lol, if the wire arcs to it, then you can kill it. It should never connected to a plug wire anyway
@paulfiebke3909
4 жыл бұрын
Thanks
@trainer2018
11 жыл бұрын
Paul, when you are talking about the second and third ramps for the primary side of the coils, why do you only look for turn on occilations at the beginning of the first and then look for occilations a little bit after the second and third ramp? Does this have to do with the on time of the coils? So if you see occilations at the beginining of the second and third ramp, does this indicate a problem with the coil because the coil is being stressed due to the fast current surges? Thanks Paul.
@billallardyce3618
5 жыл бұрын
Dude you rock, this is exactly what I found (not in the same detail) on my 2003 expedition with a po356 I need a new PCM
@ScannerDanner
12 жыл бұрын
Thanks for the reminder. I know the misfire codes follow cylinder numbers, I wasn't sure about the primary control trouble codes.
@ScannerDanner
12 жыл бұрын
If it has a new IAC valve and you are still getting IAC codes, then you have either a wiring or computer problem or you have a vacuum leak which can cause "idle adaptive limit" codes and also stalling/racing idle speeds.
@ScannerDanner
12 жыл бұрын
Hey bro, I added a note in the video at around the 20 minute mark thanks to your comment. I appreciate this very much as I misspoke in the video about the coil driver.
@fivefortyeye540i
11 жыл бұрын
@scannerdanner am I wrong in saying ford should have devised some sort of circuit protection like a fuse, in anticipation of a coil shorting out.. The computer became the fuse!?
@MrSpeed-cn7pp
9 жыл бұрын
Paul. If you could use only one test. Current Ramp vs Primary ignition (on a Scope). Which one would you choose. In other words, which test could you get the most information out of; and are they the same for ignition coils and injectors.
@scientist100
4 жыл бұрын
Danner, I did this test and I dont see ground at all 4 terminals. I also checked the crankshaft sensor and I see signal with the scope, hall effect sensor. I also smell gas not being burnt of course and it appears that only 2 cylinders get more gas. What else can I check other than PCM power and grounds. Those look good, there are 4 wires that go into it, 2 power and 2 grounds and they look ok. I noticed that the connector ha da bit of engine oil from what it looked like, I'm thinking a short occurred or the computer has oil in it but I have no idea where that came from. The pump turn on and off once the key is in the on position and check engine flashes. I'm ready to call the computer. I also get a code for the throttle body but I dont think that input controls the ECM firing.
@arcadiogalindez6407
2 жыл бұрын
you want to know the sad part of all of this ...is that i studied all of your hand movements while you was teaching and then decide to get a picoscope 4425a and know i have to learn it all over again due to that pico decided to change and upgrade the program to a 7 and it looks nothing like your old program so i am really lost... is the a video where you due a tutorial on there new program ...because it coming from your mouth... it just sort of makes more sense....you have a way of teaching that for me is awesome i really get it ...
@ScannerDanner
2 жыл бұрын
Thanks so much! I'm planning on a pico 7 basics video soon
@arcadiogalindez6407
2 жыл бұрын
@@ScannerDanner no thank you for being there for small guys starting out in this field ...soon enough i am going to sign up as well ..i just need for things to settle down a little on the home front side ...my wife thinks im crazy when your right about the fix and your like hells yeah.. i be doing the same thing while im watching your videos she could here me talk to you ...she said ..she is going to get me some loony pills ...once again thank you cant wait for the video....
@ScannerDanner
12 жыл бұрын
If you are talking about the #2 coil, that is possible. If you are talking about the #6 coil, the answer is no. A shorted plug/melted plug WILL NOT increase primary current flow as this is happening before the plug fires.
@nickayivor8432
2 жыл бұрын
Good Afternoon ScannerDanner have a great day 👍 Take care ScannerDanner God bless you 😊 Great tutorial thanks 👍 From Nick Ayivor from London England UK 🇬🇧
@johnmckamy6398
7 жыл бұрын
this is awesome information and I could watch it all day
@ScannerDanner
7 жыл бұрын
Thanks John!
@markhamill5307
11 жыл бұрын
another great video,found you a couple of weeks ago, fantastic methodical diagnostics,simply the best working my way through all you videos, thanks for all your teaching methods really easy to follow,I've only got a ADC212 just now but have been using it more and more since coming across your videos next time your in Scotland i'll buy you an IRN-BRU Thanks Mark ,
@ScannerDanner
12 жыл бұрын
Thanks man, I really appreciate the comment.
@miltonscornertobylove5068
9 жыл бұрын
Hi Dan. Very informative video. I have a question, Could you have just used the verus by it self to check the current ramp w out the pico scope? Or the pico was just used on these particular vehicle, cuz I've seen u used the the verus w out the pico scope? Ty.
@ScannerDanner
9 жыл бұрын
+Milton Solis absolutely I could have used the Verus scope for this. I just chose the pico in this case study
@andyfanshawe
12 жыл бұрын
I loved this! Got quite excited watching this (must be my age!). How many shops would have changed the ECM only to find that one gets fried too? I bet most of 'em. Never ceases to amaze me watching Paul do this. Unbelievably fascinating. Hey Paul, you said there was another ECU on the floor. Did you ever check that one out? Was the truck eventually fixed?
@Amopower
11 жыл бұрын
I did read more about that last night, that electricity travels pretty much at the speed of light so it really doesn't matter what wire you use, it will get there at the same time, and any difference would be non-measurable. thanks for replying
@ScannerDanner
12 жыл бұрын
Thanks man, great questions and great points you brought up too my friend
@gonzalohernandez88
10 жыл бұрын
Hi ScannerDanner. What must be the minimum bandwith of an oscilloscope used in automotive diagnostic. Thank for your answer.
@DanWebster
9 жыл бұрын
So with the engine coils all the same age basically would'nt you go ahead and replace all of em when replacing the computer not just number 6? Thanks for posting. -PawPaw
@KrazyBear918
8 жыл бұрын
Could P0356 simply be a bad or failing coil or spark plug? I know there are other codes pointing to the coils (P0301-P0308 I think?). Autozone suggestion from their "computer diagnosis possibility" readout said ignition coil and/or spark plugs. Thanks!
@overzealousarborist
12 жыл бұрын
Don't worry about it man. You know a lot about cars.
@ScannerDanner
12 жыл бұрын
yes my friend. both pictures are primary current ramps. What I am showing is not only can you see primary faults but also some secondary faults in a primary current ramp.
@faustogonzalez8397
7 жыл бұрын
Awesome Paul as always. Just a thought, couldn't we have grounded the # 6 control wire at the CPU with a test light and then monitor the # 6 coil current pattern. As you mentioned before, using an incandescent test light grounded to the frame, etc would have allowed to simulate a good control signal at the CPU without concern about potentially damage the CPU driver. Thanks keep up your Awesome work on your videos🙂
@zloben9000
12 жыл бұрын
man you have tested everything it is the computer ... or its shorted to power(not ground) but that's IMPOSSIBLE. as always man great video !
@JohnzCarz
12 жыл бұрын
Awesome case study. And thank you for following up with a test of that coil using an ohmmeter, I was wondering whether that would show bad or not using that method.
@ScannerDanner
11 жыл бұрын
The theory with the second and third ramps having an initial straight up line is due to the fact that the primary field has not fully collapsed before it is turned back on again. Normally you never want to see a straight up line in your current waveform on a coil of wire that is producing a magnetic field. As for the second and third ramps being smaller and having oscillations at the beginning, I am not sure we can call this early coil failure, but I am seeing this as a pattern.
@ScannerDanner
11 жыл бұрын
that is correct! and no problem my friend, happy new year to you too
@buckwheatjones762
8 жыл бұрын
Few questions: 1) Can you post a link to your book please? 2) Can I use a generic digital oscilloscope for this sort of work? In particular, a Fluke 199C handheld. This scope is a 200mhz 2 channel. 3) If using such a scope is possible (Fluke), how does it reference back to your work (or book)? 4) Are you using a special automotive system/scope for these tutorials? 5) Do I have to have special probes such as a capacitance probe you were using earlier? Thanks!
@ScannerDanner
8 жыл бұрын
Go to my website www.scannerdanner.com for more info on the eBook and paper book. It is becoming more and more difficult to answer questions here. I have 80,000 people asking me for help now. So I have created a forum to help you guys better. It is free to join and we can exchange pictures, wiring diagrams and waveforms if needed to help guide you through the process of troubleshooting your vehicle. Thank you so much! Hope to see you there. Paul Danner (ScannerDanner) www.scannerdanner.com/forum/post-your-repair-questions-here.html
@elvisroblero
9 жыл бұрын
Hi paul. I have a question regarding testing 3 and 4 wire COP coils. I have tested control circuit before by packprobing the control wire on the coil and connecting a grounded test light to it to see on and off control from the coputer. I see u recommend this test on 2 wire COP coils but not on 3 and 4 wires. Is there any reason why this shouldnt be done?
@ScannerDannerPremium
9 жыл бұрын
The two pin designs your connecting to coil negative. On the 3 and 4 pin designs you are not. Coil negative is internal and cannot be accessed so what you can see is base circuit control signals from the PCM. These are low voltage signals that will not light a test light. Possibly an LED type but definitely not an incandescent. In fact with an incandescent light you may actually pull this signal to ground.
@Viper81766
9 жыл бұрын
ScannerDanner Premium If the signal is pulled to ground will that hurt the PCM ? Thanks brother
@chiefeaglebear2320
8 жыл бұрын
i love that "are we gonna fry #5 driver yes i dont care the pcm driver is already fried" scanner we have established the driver for 6 is fried by jumping to driver #5 we are gonna see if problem that popped #6 driver is coil related taking into account those other funky secondary ramps we can say we need a coil based on that alone but having the need to verify why 6 was popped would it be fair to say you had a high amperage event get through to that driver somehow inside pcm i really loved the lesson on putting those voltage waveforms over amperage to find cylinder problems thank you
@dvdgaudette
12 жыл бұрын
Hi Paul, Quick question: If you were to use the lab scope on the Verus for the procedures in this video, would you need to use an attenuator of some sort? I would hate to be the one who cooked the lab scope on the Verus at work (it belongs to the business owner).
@Angelo80907
4 жыл бұрын
Awesome video with great details and easy to understand. Thanks!
@Amopower
11 жыл бұрын
Hi Paul - Happy New Year. I was remembering a "fix" for a bad idle being related to the type of wires that were put in the car. I hear some of the aftermarket, supposedly better performance wires actually cause poorer performance. What's the theory behind that? Is it because with these non-OEM wires, you are actually affecting the timing because the wires transfer electricity that much faster (or slower)? Can any of this be shown on a scope to prove it?
@GangsterDragon81
8 жыл бұрын
I've had a bad run of ford ignitions lately so this was a nice one to watch. we have been experimenting on a new development of the wyzeprobe and like to use the Fords to experiment with. I recently got myself a verus and am having a hard time with the record function to grab "video" of the running patterns. Do you have any videos that might help?
@ScannerDanner
8 жыл бұрын
I have a 17 part series on my premium channel on using the Verus. There is a 14 day free trail. There are plenty of case studies on this channel as well where I'm using the Verus
@ReapR_X
3 жыл бұрын
I have a misfire on cylinder 3. 08 Expedition (P0303 code and P0316) I do know that even with the misfires, my injector is still firing on that cylinder. If I understand you correctly, if the coil isn’t firing on cylinder 3, the injector shouldn’t be firing either, in order to protect the cat. What should I look for now? I’ve replaced all spark plugs and the COP for cylinder 3. All Motorcraft parts. I’ve even replaced catalytic converters, the injector for cylinder 3 and MAF sensor. Compression is good and so is fuel pressure. Any ideas? Please advise
@ScannerDanner
3 жыл бұрын
These models are known for misidentified cylinders. It may not even be cylinder 3 that is misfiring. Confirm by doing a cylinder drop test (unplug coils one at a time) Is it a constant miss? What is the 316 code definition?
@ReapR_X
3 жыл бұрын
@@ScannerDanner thanks for the reply. The P0316 code is misfire at startup
@ScannerDanner
12 жыл бұрын
These are notorious for bad coils. IF the computer doesn't like the current draw it will set this fault even though it isn't misfiring. You really need a scope and a low amp probe to look at the primary ramps of all the coils.
@ozcanceltek1365
3 жыл бұрын
Hi mate fantastic video. I have a 2002 f250 from australia and its a 5.4 similar to your vehicle in question. However my misfire is intermittent and not constant. There is no patterns i can tell. Does it idle, at 100kmh etc. I have changed the coils, spark plugs and oxygen sensors, and have already swapped the coil 6 to another cylinder to see if it moves. It hasnt. The only code i get is the po356. What would be my next move. Cheers. Ozcan
@ScannerDanner
3 жыл бұрын
Intermittent in nature suggest the driver is fine. Look close at the wiring harness to the number 6 coil with that code.
@Makinson480
5 жыл бұрын
I'm having the same problem this is the first time it gave a code for anything. on my 2001 Ford mustang gt I have a my code is p0355 I did all the test when I connected my noid light than started the car the cylinder 5 hardness there was ground no pulse could that be a large change the PCM is done for.
@brainwashed7244
7 жыл бұрын
i have 2004 5.4 3v code 351 and 356 but the failure is intermittent, have you seen many ecms cause intermittent failures?
@ScannerDanner
7 жыл бұрын
When the PCM driver fails for a coil, it is NOT intermittent.
@RGTFanatic
12 жыл бұрын
Excellent video that I truly learned from. I would have passed class today! My question is: Can a person perform any of these diagnostics with common electrical diagnostic tools (volt meter, test lights, spark/ignition tester, simple scan tool)? Are there other tests that can be performed with my simple tools (and simple brain) that will help me in diagnosing my P0171 and P0301 DTC's? I know I can throw a coil at it, but I want to know exactly where the problem exists first. '02 Expedition 5.4L
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