DODGE RAM 5.7 HEMI MISFIRE INSUFFICIENT IONIZATION DIAGNOSIS & FIX

Рет қаралды 273,726

Жыл бұрын

In today's video we take a look at a 2014 Dodge Ram 1500 with a 5.7l Hemi V8 engine. The customer's complaint is that the engine has a constant dead misfire on cylinder number 7. After using a scan tool to read codes we find that we have a P2320 Ignition Coil 7 Secondary Circuit-Insufficient Ionization code stored in the PCM. The owner has already replaced the spark plugs with high quality iridium but still has a misfire. After swapping coils and not seeing the misfire move, I knew we had a more serious problem. Follow along as I take you step by step through troubleshooting and repairing this truck!
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Пікірлер: 487

@charliemendoza4032 Жыл бұрын

Great diagnostic, The biggest problem having the pcm close to where all of the heat from the engine. I know its easier to get at but having to replace for it again and again. Its better having the pcm in the under dashboard, far away from the heat.

@viplegaleducation1292 Жыл бұрын

Man that one was a tough one. Had to pull out all the stops! So much respect for your time and display of correct diagnostics!

@richard1835 Жыл бұрын

I knew about Ionization in an article I read about the spark plugs but now I am getting to see someone actually troubleshooting one of these issues. Great video. Thumbs up

@ADVANCEDLEVELAUTO Жыл бұрын

This was my first time running across this code. It seems to be a Chrylser thing. Thanks for watching!

@tctwg1 Жыл бұрын

Whenever I get DTCs that have a circuit codes it’s never been anything internal mechanically with the engine. It’s always been a wiring or module issue. Glad you got it fixed 👍👍👍

@davidaziz8158 17 күн бұрын

Same problem here. Did all those test. Im at the valve cover step. Thanks for solidifying my taughts on this

@v8motors. Жыл бұрын

Great stuff, you always get the hard ones. You went through all the possibilities which left only the pcm.👍

@socaltl8535 Жыл бұрын

Great diagnosis, I would never think that a PCM could be the direct cause of a misfire in a million years.

@ADVANCEDLEVELAUTO Жыл бұрын

Honestly it still confuses me because the PCM is still able to control and fire the ignition coil but it detects a misfire due to it's own fault.

@djoj1986 Жыл бұрын

I have come across this code many times. It always turns out to be a pcm for me.

@W.Khairi Жыл бұрын

Seems like Chrysler PCMs have a thing of their own

@socaltl8535 Жыл бұрын

@@ADVANCEDLEVELAUTO Yeah its like it's throwing punches right back at itself.

@bearchow1929 Жыл бұрын

Take it from a highly experienced electronic engineer, you're good, very good.

@kurtkennedy5370 Жыл бұрын

Ive replaced two PCMS for this in Dodge Rams. Its always a hard call with no 100% proof but when you eliminated everything else, an educated guess is what you have to make. Nice Work man!

@ADVANCEDLEVELAUTO Жыл бұрын

Exactly! Thanks for watching!

@W.Khairi Жыл бұрын

Spot on, If only customers would appreciate

@W.Khairi Жыл бұрын

Spot on, If only customers would appreciate

@jessiejacobs1540 Жыл бұрын

Awesome job well done 👍👍👍

@moemoe48210 9 ай бұрын

Lol my dads 15 journey kept draining batteries. New alternator battery. It was pcm

@mikechiodetti4482 Жыл бұрын

Diagnosing can be exhausting! But you came through with the proper analysis. Very good fix!

@louislouis4221 Жыл бұрын

Step by step troubleshooting. No guessing game. Excellent. Thank you for sharing your knowledge.

@mitchlu Жыл бұрын

This proves you do not have to be an engineer to be a genius. BTW-I'm an engineer...great diagnostic work, Eric!

@rbarr1200 Жыл бұрын

I’m just 17 minutes in but I love it and all your videos. Your channel is the best edited , best at engaging viewers, most informative in short bursts in the mechanic KZfaqr realm. There’s more I could say but to keep it short , you’re amazing at what you do.

@ADVANCEDLEVELAUTO Жыл бұрын

I try to cram as much info as I can into each video without wasting peoples time. Thank you for watching and supporting the channel!

@robbiloca007 9 ай бұрын

Yes he is the best on KZfaq from information about everything

@jpjautotech7622 Жыл бұрын

It really blew my mind when I first saw the ignition waveform for cyl #7, I couldn’t make any sense of it either, initially. I know you and so many others are wondering how it is that the PCM can properly ground and release the coil, yet there is no spark, with an odd looking waveform. So after thinking it over a bit, here is what I believe is basically happening. A transistor is composed of different layers, some of which are insulation between conducting layers. I believe what is happening is essentially the effect of an insulation breakdown inside the transistor for that coil’s driver circuit. So the transistor can operate properly and switch on and off as long as the voltage is not too high. But the voltage spike from the coil being released is high enough to leak past the insulation and start conducting to ground again. That would explain the odd waveform, which interestingly, looks similar to a current ramp. Also I noticed that the peak inductive kick voltage is only around 40 V on cyl #7, but off the scale on #5. That would also seem to indicate that the transistor starts re-conducting again around 40 V, and dissipates the energy that would otherwise have created a spark on the secondary side. I am by no means an electronic expert, but I know the basics, and I believe that explains what is going on. Someone with a more in depth understanding of electronics and transistors please correct me if I am wrong.

@chuckvoss9344 Жыл бұрын

An amazing amount of testing to find the problem. Very good job!

@Gary_in_NoVA Жыл бұрын

Great video! When you 1st said the owner replaced the spark plugs with Iridiums, I thought for sure that would be something to do with the problem. It is pretty-well known in the 5.7L Hemi community that this engine likes basic copper plugs better, Champions or NGKs. So glad to see that you swapped plugs later on in the video to rule that out.

@wessly4283 Ай бұрын

Thats a negative, they prefer irridium. Wont run well on very many plugs at all.

@44hawk28 Жыл бұрын

Just a piece of information, ever since they removed the sulfur from gasoline about 2004 2005 ish that has caused a lot of fuel level indicators to start acting up because they no longer get lubricated. And occasional addition of Marvel Mystery oil, about 6 oz maybe 8 oz on occasion to the fuel system works wonders for making sure that the fuel system still gets lubricated.

@derofromdown-under2832 Жыл бұрын

Excellent diagnosis and conclusion Eric... WELL DONE!!! 10/10

@andrewvillanueva3722 Жыл бұрын

You are a master mechanic bro. You always put out very detailed information.

@ericsacco7406 6 ай бұрын

AMAZING job!! I just had the SAME ISSUE!!! 2014 Ram 1500 with the same code and no ignition/fuel on Cyl. 8. I had an electric shop verify the ECU was bad 100% I got a new rebuilt ECM that is programmed. When I power the truck up it says that I need to push in the clutch? It also has lots of warnings. I did not cycle the ignition like you did I will try that. I took the new ECU out and put back the old one and it does the same thing so it must be a program issue that I'm not following. Thanks SO much for this vid!!

@saedchammaa1958 Жыл бұрын

AWESOME! Man I always open your channel to check for new videos, please keep them coming. In my opinion, your channel is the best at explanation when it comes to Auto repairs.

@robr4596 14 күн бұрын

Thank you for the time to diagnose a dodge. Im 99% sure now that this is the same thing wrong with my friends.

@keithmiller7078 8 ай бұрын

First time watching your videos. Really appreciate your time and effort into them. It helps us non mechanic guys understand a lot. Keep it up. Thanks again for your hard work.

@jefftaylor1247 Жыл бұрын

Excellent video. Your logical process through debugging the issue was impressive.

@thyhangman Жыл бұрын

Owner of a 2013 Ram 1500 with the 5.7 and I found this video very useful, informational, very educational and mostly entertaining you'd make a great instructor! Gets my like and subscribe, very well done Eric and appreciated!

@Clamlifenc 7 ай бұрын

Love your video and how throughout you diagnostic skills. I’ve watched many of your videos and love it. I bought my car to a mechanic to fix my brake problem, they replace master cylinder and booster without making diagnostic properly. The brake doesn’t work so they called and apologized but still I’m getting charged for the parts, they felt bad to charge me for the labor. If I take my car to you to get it done by you correctly, I would’ve save money from replacing good parts! That sets him apart from average Joe mechanics

@amjadzidaoi4011 Жыл бұрын

Great content as always. Awesome thought process covering all your fundamentals before condemning pcm.

@netsurfers9357 Жыл бұрын

Awesome job!... Like how you ruled out everything else before figuring out that the PCM was bad! It makes a lot of sense, because PCM does on/off coil switching!

@88camaroman Жыл бұрын

Man I always enjoy watching the way you troubleshoot cars. Great information

@charlesecheese8499 Жыл бұрын

Thanks for the detailed explanation of your thought process and diagnostic procedures. I always learn something from your videos.

@stevenlatham4397 Жыл бұрын

I’m so glad to see you’ll be at 100k within a day. You deserve to have a million though. You diagnose and correct some of the most complicated and craziest electrical issues. No matter how relevant your videos are to me I watch them all. Great job.

@ADVANCEDLEVELAUTO Жыл бұрын

Thank you for all the support!

@josesantiago5829 Жыл бұрын

Muy bueno el vídeo,lo mire desde principio asta final muy buena información

@josesantiago5829 Жыл бұрын

I have a 2010 Ram 1500 check engine light (mirror passenger right circuit short to battery B1645) any ideas what can be wrong?…thanks

@ml9704 7 ай бұрын

This is a very informative video. I have a 2014 Ram 1500 5.7 hemi. I have been chasing these gremlins for about 6 weeks. Started with a broken spring and dropped valve in #7. Replacing all springs, broken valve, and pushrods didnt correct issue. Did a MDS delete because i was going to remove heads again. Put new cam and solid lifters in. Still had random misfire (P0300). Purchased an refurb PCM and i still have P0300. Gonna go through it again following your video, hopefully my luck changes. Thanks again.

@hardroad8236 Жыл бұрын

Nice bro, I just discovered your channel . I thought it was Awsome how you explained how you went through process of elimination And discovered it was the pcm. Man that would have drove me crazy Great work .I'm glad I found your channel. nice to see an intelligent and informative mechanic.🤛🤛

@hightttech Жыл бұрын

Wow. Nice one. That was EXPENSIVE diagnosis.

@MyAdventures850 Жыл бұрын

Amazing video. I've worked a parts store for over 30 years and I tell customers all the time to have a proper diag. Done before firing the parts canon

@adriangutizz6621 Жыл бұрын

Hats off to you sir! Thank you for your time and effort in sharing your experience.

@kcedgar04 Жыл бұрын

Your troubleshooting skills are top notch your videos are informative and very helpful 👍 I don't own a automotive scanner I definitely want one

@matthewdale174 Жыл бұрын

Wow My first thoughts based on the primary ignition waveform was an issue with spark jumping out early to ground. I am surprised that turned out to be a failed PCM. Especially since all the current ramps showed clean turn off. If the collapse is clean on the current ramp I guess the inductive kick was shorting to ground internal to the pcm That’s crazy nice find yo. I was thinking you could of pulled the coil out and put a plug in on side of the coil and ground it to the other coil boot and then taken the primary waveform again. If it changed then you’d be going with something other then ignition. Either way u tested and came to the right decision great job

@clueless6559 Жыл бұрын

Yes his primary was showing a low spark line and a tailing off burn line indicating a shorted secondary , i would have tried to put a lead on the coil and viewed secondary after seeing that , european cars have used this ionisation thing as feedback for years for ignition timing control and cylinder position .

@subaruanon Жыл бұрын

Thank you so much! I had another one of these come in today with the ionization code except on cylinder 4. Following along your video helped me determine it was also the PCM on my customer's truck! Knew the coil swapping trick but hadn't used the oscilloscope feature before to go further.

@jgeorges3061 Жыл бұрын

Eric, AWESOME thought process and fix and when i do relative compression test i just put my scope led in revers yellow wier on neg and black on positive with out inverting the wave form only AC coupling will do the trick always learning from the best cheeeeers and thanks for sharing.

@mitchellphilman7238 Жыл бұрын

Thank you for this video. I am in the middle of diagnosing the same issue with cylinder 5️⃣.

@p71fan7 Жыл бұрын

Great job! I have a 5.7L and I was thinking that it would be the roller on the lifter had frozen up and was affecting the compression. Glad it was not. Really like you way you explain what you are doing step by step.

@andybilakshow260 Жыл бұрын

Wait ago~! Not knowing anything about scan tools & such, you sure did create food for thought. Almost makes me want to get one now~! Diagnostics is so much easier with it. *WELL DONE* & Thanks for putting this together.

@autotech8326 Жыл бұрын

As a used car technician all data is very useful. They even have bulletins when it comes to problems are very reoccurring, and they literally explain what to do, what to replace, what to reprogram and what not!

@EATSLEEPFARM Жыл бұрын

Knocked it out of the park with this one!! Great stuff brother

@normandfogarty3505 3 ай бұрын

Love your channel. You explain everything so easily without any nonsense. 👍👍

@kirbyglover3868 Жыл бұрын

Very helpfull you explaining 🙄 every thing very clear ...GOOD JOB MAN

@albertlopez9220 10 ай бұрын

You did a great diagnostic, I always learn something every time I watch your’s videos thanks for sharing your acknowledge

@66Ton99 2 ай бұрын

Thank you! It is helpful information and nice tricks! I have RAM 1500 5.7 2015 and sometimes it's misfiring, but I ignored it. I had plans to replace all ignition coils, but after this video I will investigate it in more details.

@MrLabarr123 Жыл бұрын

Great i think my 2013 ram 5.7 is doing the same thing but #2 misfire. did the same swapping of coil and spark plug. Thanks for the video very helpful on a path to follow on problem shooting.

@marianosanchez6969 2 ай бұрын

Thank you and really appreciated your time. My 2014 Dodge Ram 5.7 I think has the same problem.

@pl5882 Жыл бұрын

Wow great diag! Thanks for setting up the scope at the end. I know that takes time from wrapping it up and getting out of there.

@billyfox384 Жыл бұрын

Great job as always.. Looks like ur doing better. That shop closing video is a tear jerker. Peace , all the best

@dtandfam8100 Жыл бұрын

Awesome find on this. Way to verify and prove your work! Thanks for sharing 👍 tons of info!

@john7017 Жыл бұрын

Excellent video! Very informative and thorough. Thanks for sharing.

@justkiknit Жыл бұрын

Man I just have to say I love your videos. I’m a technician myself and wish I worked with techs like you. Too many modern techs don’t give a damn about their work or their diagnostics.

@xj31 Жыл бұрын

Nicely done. Great demonstration of how it's not the tools but the knowledge and know how. You used that ancient scope flawlessly

@ADVANCEDLEVELAUTO Жыл бұрын

I wouldn’t call it ancient 😂

@xj31 Жыл бұрын

@@ADVANCEDLEVELAUTO well I'm ancient🙂

@alexanderthegrape5370 Жыл бұрын

Wow! Awesome content and you're a gifted teacher all the information was easy to digest.. you have subscription!

@steveharrigan1296 Жыл бұрын

Wow Great job with that issue. you are thorough!. Makes you a great mechanic.

@danmillward6118 9 ай бұрын

Your good keep it up I have the same problem on a 2012... my mechanic did everything but the pmc...but was leaning towards it...good job.

@rickrogers2649 Жыл бұрын

Great diagnosis Eric, Thank you for posting and showing the backstory to how you go about the diag. Maybe you could give a shout out to where you got the re-man pcm . Having a source for pre-programmed pcm's would be really helpful to diyers who don't have the skills or equipment to do programming. Thank you again. Stay well.

@ADVANCEDLEVELAUTO Жыл бұрын

I got this one from AutoComp in Houston, TX. I've been buying from them for the past 15 years and have always had a great experience.

@edmaster256 Жыл бұрын

How many Miles on that engine?

@rickrogers2649 Жыл бұрын

@@ADVANCEDLEVELAUTO Thank you Eric. Good to know of a reliable source.

@jerradstilson7285 8 ай бұрын

Thank you for making this video, I was at my whits end trying to diag an 03 5.7 and this just gave me a direction to follow

@vins0916 Жыл бұрын

Hi there, Eric this was again an awesome video to watch, I learn a lot from your video,s also from your friend oz. My level gets better and better, I like the the way you explain things step by step-by-step that makes it easier to understand also for others I believe, especially my English is not on a top-level . Keep on doing the good work 👏

@fteve1961 3 ай бұрын

wow! where are we going to find enough mechanics like you to service all these vehicles.

@W.Khairi Жыл бұрын

Your r the man Eric, If only we knew how would the pcm fail when it can switch the coil and still monitor the spark line. Maybe the driver was getting tired and not switching fast enough

@kevinstill1 10 ай бұрын

Awesome. I love watching your videos. I always learn something new.

@hawttiess2998 6 ай бұрын

bro this guy is such a great mechanic 👨‍🔧 i love it man keep it up

@dasimcoes Жыл бұрын

My 5.7 hemi misses under load. No codes show up. New plugs, coils. Heads were pulled. Lifters and cam are good. It’s been to two dealerships multiple times. I’m ready to give up. Gas mileage is around 9mpg and I have to try to get that. Know one has mentioned checking my injectors but you would think that would throw a code.

@brianknight6661 Жыл бұрын

Great job of following good testing procedures.

@bartscave Жыл бұрын

Wow. I can't see how the pcm would do that. Another good diagnosis!

@richardjennex6583 Жыл бұрын

Just came across your video and it was very good thank you for sharing your information and knowledge

@Broski87844 Жыл бұрын

Great video. Thanks for taking the time to make and post.

@paulgilliland2992 Жыл бұрын

Fantastic diagnostics and repair.

@lorrainebwoy Жыл бұрын

Love your diagnostic process

@judih.8754 Жыл бұрын

Very thorough diagnosis!

@larrywalker3137 Жыл бұрын

I am impressed with your knowledge every time I watch one of your videos good job young man

@ADVANCEDLEVELAUTO Жыл бұрын

Thanks for watching!

@carlosllama9979 3 ай бұрын

Man that was an outstanding video. Thank you so much for taking the time I have a 2013 dodge 1505.7 hemi engine with a PO 305 still in the number five and he cannot make heads or tails out of what’s going on he meeting my mechanic where are you guys out of, my truck still in the shop I’m gonna have to mention to him the PCM thank you so much man I really appreciate your video

@ThunderbirdRocket Жыл бұрын

Great 👍🏼 Advanced Level INSTRUCTION !! Much appreciated . 👊🏼

@logicalguy488 Жыл бұрын

Well done, you really checked everything.

@EagleMan0109 7 ай бұрын

Thanks! I'm going to go straight to replacing the PCM.

@julesballe463 Жыл бұрын

Wow, lots of hard work, great job eliminating sooo many other things....thanks again....

@Airborne82 8 ай бұрын

Well done!! Very thorough and very helpful.

@jubemarsh2202 Жыл бұрын

Excellent as usual... If i haven't mentioned it yet... Wish you were in San Antonio to diagnose my 4.7 Grand Cherokee 🤙

@briandavis5157 Жыл бұрын

super job! Seems to be the same issue I am having but cylinder #4

@j.maxwaddell2557 Жыл бұрын

Eric I am not a mechanic but I thoroughly enjoy learning from you and your incessant drive to find the real problem no matter what it takes. Great job again. Thanks for the education

@johnj5985 Жыл бұрын

Brilliant analysis. Definitely, high level of skill required for proper interpretation. Love it!

@serenityplantation7638 11 ай бұрын

In my job I have plenty of time to watch videos out of boredom. I’ve watched thousands and thousands of videos and found this. YOU sir are way under rated. I knew a few minutes in, that you weren’t some clown pretending to know a little about trucks like 99% of KZfaqrs. I’d honestly feel comfortable using your video as a tutorial should I ever cross this issue on one of my Rams. I’m going to have to check out all ur videos cuz even though I don’t have anything wrong with my truck, it was very educational. EXCELLENT VIDEO !! 5⭐️s

@GregFeeney392 Жыл бұрын

Great video. My only tip would be to use a vacuum gauge ,while cranking and while the engine is running

@wishbonewillow7660 Жыл бұрын

Amazing top shelf work.

@techiapas4717 Жыл бұрын

Greetings, you have very good diagnostic videos. I also like to solve cases regarding diagnostics in the fca line. The PCM has a misfire counter. When the PCM detects many cylinder misfires, it disables the pulse, although it is not necessary to rule out driver damage. of spark, I have solved some cases by changing the misfire counter with hp tuner without replacing pcm.

@cobraninetysix3883 7 ай бұрын

Excellent Video! Great troubleshooting sequence, and thank you fir using the word combustion. I had a shop teacher many years ago who would scream in your face like Sam Kinison if you used the dirty word Explosion 💥combustion CONTROLLED BURN.