I have never been that big a fan on Chrysler's. The only Chrysler I ever had was a Chrysler Newport and I bought it used. It was about 12 years old when I got it. I always wondered why Chrysler starters were so damned expensive! They always sounded like they're running like a bat out of hell and straining to turn the engine over
What an ending....Eric O is a sadist...no doubt about it. It's almost as if the PCM was firing injectors and the coils presumably, to feed a 10,000 rpm engine! Flaky PCM, or flaky input to the PCM??? Can't wait for part 2.
MAN... ive been doing cars for 12 years now and i can pretty much hold my own working independents where im usually the only tech.. ive only once had a mentor who was as tech savvy and knowledgeable as this man.. unfortunately it was my first job at a dealership and i was not at all of the mind to be able to learn what he was showing me and maintain it.. i was still struggling with mounting tires lol.. oh how times change... after watching this video i realize i still have a lot of work to do and can be a lot more detailed in my diagnostics when some times i am not.. im still using Snapon Solus and really would like to make the move to the scan tool your using and learn to use it as you have shown in the video here.. very very good work!! i only know one man who works to this standard, he works for Dodge and is the #2 Tech in NY State. think one of only a handful to be certified by dodge to work on the Viper and other odd models like Hybrids they put out.. Prowler i believe needed certified techs to work on.. again, SWEEET video! best ive seen on you tube!! i request more in depth tutorials on the scan tool your using please
Great ending!!! The suspense is thick in this one. Sounds like you let the magic smoke out of some electrical composent. Judging from the green trace (CMP sensor?), it was something on that circuit. That engine is a mystery. Looking forward to part 2.
I may want to say thanks for this video! You have given me a direction to go in concerning my Liberty aka "The Jeep from H*ll" because of the issues that I've been having. Because you posted this up, I'm hoping the direction you gave me will ultimately get this hemorrhoid vehicle fixed! Oh and btw, the number 4 & 6 plugs are easier to get to with the overflow tank unbolted and moved to the side.
Just going back and catching some of your older videos. This video was about the time we started having trouble with our 04 Liberty. About the same mileage also. Our lifters started losing oil pressure and making a clattering noise. Did the entire top end of the engine, new valves, lifters, guides, seats, everything. Lasted a two months and did it again. Never did figure out what was causing the lifters to lose oil pressure. Traded it in.
Did you notice before you replaced the crank sensor it took several revolutions before the tach started ? I'll bet it took those extra revs for the software to "sync" with only the crank sensor.
Okay...you shown several ways to check and verify know good and bad (ex..plug 2 and 4) so no waste of footage. But what a climactic ending...you got me on the edge of my seat and then fallen asking why end now. Recovered and patiently waiting for part II.
Looks like the ignition coil codes the ECM needs to See Crank Signal for the computer to Realize there is an ignition coil problem Eric O @30:08 @SouthMainAutoRepairLLC
The CMP sensor signal went crazy as soon as it happened. Wonder if it is keeping the ASD powered and shorted CMP sensor taking out whatever coil it's synched to when it dies? It's the same 5V ref wire to the CKP so maybe one took the other one out? Just thinking out loud and can't wait to see what you found!
+Hayward's Automotive How could the shorted sensor tell the computer to supply continuous ground to a particular coil? I haven't seen the schematic on this, but I think this system is a ground supply, under PCM control.....sensors supply the inputs, yes, but ultimately, the command on signal for the coils comes from a ground supplied by the box, right? Ignition coils have duty cycles. They aren't designed to be turned on 100% of the time because they're not demanded to.....So.....Could this be a continuous on condition, or an exaggerated duty cycle for whatever reason overheating them? How do you mesh burned up coils with engine flooding?
+Clete88 I don't want to steal Eric's suspense so as he diagnosis the problem it'll all make sense plus I just took a logical guess with what I seen & wrote up above. Just trying to figure out what caused the fuel odor Eric smelled, burned up coils, bad CKP sensor and the stalling after the CKP sensor, coils and plugs were changed. It started cold and after getting heat soaked it failed. Hopefully he won't keep us in suspense too long b/c that was a sizzling ending to Part I.
+Hayward's Automotive Plus the fact that when Eric tried to start the engine the CMK signal was missing (Tach didn't jump) when he was cranking the engine. The engine only started after the cam signal was restored. Dr. O also determined that the PCM used a substituted CKP signal and that the CKP is really not needed to keep the engine running. So a bad CMK signal will cause the coil to keep on firing and also cause the injectors to keep firing, the reason for the strong gas odor. Let's hope that the CMK sensor or something related is the problem (bad wiring) and not the PCM or we can be looking past Part 2...lol
+Hayward's Automotive Amazing Eric had the scope on the right circuit at the right time. Imagine if he put it all back together and gave it to the customer to have it come back with the same issue and two new fried coils. That would be my luck.
Wow, Way to leave us hangin'. I love the way you are so honest with us by leaving your mistakes in. There are other youtubers that get it right every time, and you just know it's their second or third attempt. But saying that-Stevie Wonder could have seen that cracked glass yesterday:) Just kidding. Keep up the good work! Looking forward to part two, give me a clue, are there fire engines involved?
Eric's honesty is one of the big reasons I like this channel. I know he's telling us what he knows and he shares his thought process. He isn't just relatively honest he is absolutely honest. I just wish you was down in Florida I would take my car's to him every time. Hey Eric did you know we don't have salt on our roads down in Florida? Hint!
I just watched a clip from 5 yrs ago. About a fuel pump replacement on a 03 liberty w/ a 3.7 ltr. A big help. Been watching for a few yrs now. Thanks for the help. 🤔🤪🤬
Wow! That sounds like another short happening! While you were saving the waveform to me it sounded like the engine was slowly losing RPMs. I don't know if it's true but that's what it seemed like to me
Im loving this..Eric'O baffled. All the videos that I have watched, I assumed that Eric'O knew everything but No NO NO...This is great, just great..Im waiting with baited breath for the next installment . My guess is that the board is fried, But it will be fixed with brake clean because that fixes EVERYTHING,,,Thanks Eric'O..
+Phil Bourgeois Nah. Over the past 20 years I have owned 3 Jeep Grand Cherokees purchased new - 1994, 1999, and 2005. What I notice is that many owners of these vehicles maintain them like a 4 cylinder Honda - almost no maintenance. Then they blame the vehicle when it breaks down. If one keeps up the maintenance and repairs, which is very expensive, these vehicles are dependable and fun to drive.
I had the same problem with a Ford F150 the coil driver would intermittently ground out. the truck had been at several shops and had 6 #3 coils replaced . The wire was chafed on the passenger side about 1 1/2 feet away from the PCM connector. I hope this helps. Check the powers and grounds @ the PCM and the battery pay attention to block and body grounds too. The PCM is protected by the PTC and will usually protect the drivers .
+South Main Auto Repair I'm really interested to see what causes the misfire like feel. I have an 04 Liberty with the 3.7 too with the same semi rough idea but all the coils are good and plugs are new too but no misfire counts.
I purchased my Liberty with 169,+++ miles on it, 2 of the cylinders were intermittently misfiring. the coils didn't look like yours, but when I started looking at things, it still had the oem plugs in it! and after replacing the plugs (funny enough, I put NGK plugs in it!) it still intermittently misfired. I just replaced all the coils. I figured that they were done in by having to jump the > .100" plug gaps. and since I don't particularly enjoy being stranded, it was a safer bet to replace all of them.
You are doing a great Job Eric!!!!.....this Jepp has a huge collection of problems!!!! that have been acumulating over time!!!....In my opinion you are solving them in the correct order one step at the time!!!...(in common words needs an exorcism!!! and DrO is the best I know for that kind of Job). I dont think that sound at the end represents a short circuit, because the second time the car starts again!!!...when something electrical burns, its gone!!! my guess there are some faulty conections of some sort!!! About the burned coils I have a couple ideas that wanna share with you. There are 2 kinds of sparkplugs, older distributor cars sparkplugs, and modern ones!! The old kind among their characteristics has low electrical resistance (between 0 to 10 ohms at most). The modern ones has a electrical resistor built inside the porcelain in order to filter electrical noise into the electronic system (about 1 to 10 Kilo Ohms)!!! If someone use the wrong ones in modern cars could result in to a burned coil overtime!!!....the other idea is that nothing last forever, coils gets hot and cold everytime, and plastic and epoxy and the coil dielectric enamel gets dry and toasty and shorts the overall turns of the coil, and burns!!! Just needs high quality coils, and plugs!!! Good work Eric!!! I cant wait to see part two!!!...Keep up the good work!!!! :) :) :)
The youtube mechanic universe must have aligned. ETCG just bought a Jeep to work on. He can now watch your videos and Ivan's to find out what you guys have been fixing on the Jeeps!
+The Disgruntled Mechanic yeah but having said that etcg has to do an engine swap , pretty straight forward , mr eric o has some investigating to do to see why this jeep wants to fry itself to bits ... we all have confidence in eric o he's the man for the job
+The Disgruntled Mechanic Never fear Mike he is an ASE Master and will not struggle like I do everyday to try and fix cars. Someday Ivan and myself will reach that level of automotive achievement.... someday...
lets hope etcg sees your video before he starts , he may learn something before hi kicks off the project ... great investigation work on your liberty project though
Hey Eric, At @27:00 you said that you unplugged the cam sensor so the fuel pump and injectors wouldn't kick on during the crank sensor bypass test... why would that work? I usually pull the ASD relay to disable that stuff :)
+motoYam82 Good question. I do not have an answer for, but I just observed with the cam sensor unplugged and you do a bypass test it will not turn on the fuel pump. The only reason I did it was because this engine had been soaked so much with gas previously I was just trying to prevent it a bit more. I know the bypass test turned on the fuel pump but I was not sure if it was firing coils or injectors to. Now that I think of it I do not think that it ill fire the drivers because these cars will not run on the CKP alone. However we did learn it will run on the CMP alone :) Just being cautious I guess haha, you know me safety 3rd!
maybe too much current into the coil's primary side! or shut the Jeep off and took the key out of the ignition and keep the scanner hooked up to the computer, verify if the Jeep was trying to start on its own! There is an issues with crank or cam that the coils remain hot even when the car is off.
OK, i'm halfway thru this vid and gotta throw in my 2 cents. Two wired coils are triggered directly by PCM. Dead short from primary to secondary winding (cracked or cracking body of the coil ) oozing insulating goop due a jump to ground or bad spark plug. The PCM is firing because of signal from bad CKP, or the CKP is bad due to a shorted CMP sharing an internal circuit from the PCM. Where's a ballast resistor when you need one.
NGK ZFR6F-11G V-Power is actually the stock spark plug for this application. NGK makes a platinum variant as well (PZFR6F-11), but for some reason they no longer recommend it for direct replacement. Not sure if it's because of temperature or what.
Interesting that the same circuits - injectors, coils, CPS work in the same circuits or inline with the wire diagrams that the coil shorting could have taken out the Crankshaft position sensor? All those ignition components are working simultaneously together.
Btw, did you and Ivan decided to work on Jeep the same time? at the end, it sounded like you was frying and egg. Got hungry? Can't wait for next video... the suspense. Glad to see Hannah is back on video. Teach her everything you know.
Oops there goes another coil Eric, just my thought on this one, has to be the computer being either hit by lightning (ya sure winter lightning? ) or someone reverse jumped the battery. Computer thinks engine is running at 10,000 rpm as one of your other viewers stated flooding engine and overheating coils. I'll bet your 2 quarts high on the stick.
You b*****d! What a cliffhanger! Man those coils burning up was weird! I'm gonna guess at a bad ECM ground. Great video. Ivan has posted a liberty no start today as well!
Right at the end it sounds like some control system goes nuts and starts cycling something very rapidly. My first thought was the PCM firing one or more plug coils like lightning bolts.
I know this is an older video but a thought on the key on coil fire - if the crank sensor was shorted and not working - to where the engine died, maybe - that happened when coil 4 was on the fire trigger in the ecm. That could possibly explain why the coil appeared energized when you were doing the key on charging. just a thought.
I had something just like this with a truck I had everything was going wacky when it was running.. But just setting it was fine and tested good and under the crimp at the battery was corroded so bad when it had a draw on it things were failing .
on the first time, i'm thinking bad crank sensor keeps signalling as if engine is cranking and so the coil & injectors get power. I ?wonder why the coil burnt up though.. maybe the same thing happened again and stalled the engine etc.. could be a sudden current spike/short circuit.. waiting for part 2
EPIC CLIFFHANGER!!!! Cant wait for Part 2 -- on a different note I know your love of the junkyard well I work at one of the largest if not the largest auto scrapyard in the NE in Mass. We've already processed 6,000 vehicles in 2016 , I run heavy equipment there. I'll try n make a short vid for ya of the place I call it the Walmart of junkyards you would be in heaven there. we process 100-125 cars a day absolute insanity lmao
Since we still don't know the answer, I'll throw this out there, I understand Eric gives a free set of tires on the the tough ones if you guess correctly: Intermittent issue.....get the engine running and do the shake tests on the wiring bundles....could a broken wire assist in sending bogus inputs to the ECM? I don't know how the Jeep PCM might respond to intermittent power or ground issues, but inside the computing parts, they have filter caps that could keep the CPU going....the driver circuitry however?? I don't know.. Were we hearing a relay buzzing or were we hearing injectors? Remember, the motor was dead, so the formally quiet injectors operating could probably be heard much better since it was quiet.... Do you carry Michelins Eric?
Aw man! Did y'all hear that? Dr. O. said that he's human. I wonder if Vanessa knows that? And what the heck was that sound at the end? It sounded like it was something electrical. What a way to edit the video and make us tune in to Part 2.
In regards to connecting the charger with the key on: I once connected a 20ish amp charger to a Ford Tempo with a dead battery while the headlight switch was on. The headlight bulbs flared on like flashbulbs and burned out. A couple of months ago my boss hooked up a 200 amp charger/starter to a Dodge Cummins while the key was on. We had to replace the PCM and a few days later the ECU had P0606 and had to be replaced. The Dodge might just be a coincidence though.
My first thought was that the main relay was sticking on. But at the end of the video I'm not sure. know the coil was smoking with the KOEO. My next thought is the wiring harness is shorted?
What purpose does charging with the key on serve if any? The good thing is that you caught the melt down in action. That could've gone extremely bad.....oh no, now what. Damn, a cliffhanger! At least I don't have to wait for part 2 since I'm on a catch up binge. Thanks for the video.
Here's an experiment that I've done before. Hook your scope up to your battery charger. Look at the waveform. Every charger I've ever checked has never had perfect dc current. That could be why you've heard people say not to turn the key on, although I've done it dozens of times without issue.
In the Summer use 20W50 oil to protect the cylinders and engine. In the winter use 40 or 30 wt. Put antiseize on plug threads. Use silicone grease on plug wires.
Had a p0320, misfire, and few other codes on a Maxima. Replaced burned up coil, plugs, CMP/CKP sensors. Needless to say.. hours later working on the "ground" I found the problem haha
great job eric looking forward to part 2 ive heard of coils burning up from lean fuel mixture fuel pump? probably not in this case but something to keep in mind
+Discretesignals I legitimately feel bad for them, because they try really hard, but they just have less money than everyone else. Therefore they have to cut corners that other brands don't, that result in random BS like this, that makes customer confidence in the brand sink further, which means they aren't making money. Vicious cycle.
+ice44567 A few of the Jeep's slogans throughout the years: The toughest 4 letter word on wheels. Have Fun Out There Only in a Jeep Jeep. There's Only One Now those slogans make sense..haha
Discretesignals Lol. The sad thing is I live in Toledo and pass the North Assembly plant every day on the way to work. These turds were all made here. I'm sorry that we unleashed these upon the innocent and unsuspecting (both consumers and guys like Eric who thought they understood car electronics pretty well) LOL
+ice44567 Believe me, I'm sure Eric loves those little challenges. I live for them. Nothing like getting something like that and solving the case. Jeeps/Chrysler are not all bad. Thanks to Chrysler, GM, and the rest I wouldn't have been able to buy the house I live in or bought all the nice tools I have.
You stated that in another video you had replaced the water pump on that Jeep. I was wondering if it got real hot and started the coils melting if it was losing coolant and then I watched the end of this video. Hmmm.
It's comforting to see someone of Eric's caliber make mistakes like pulling out the wrong plug. Thanks for keeping the footage in.
+Adrian Kingsley-Hughes Haha just a human here!
I've never owned a Chrysler product and after seeing all these videos I never will.
I have never been that big a fan on Chrysler's. The only Chrysler I ever had was a Chrysler Newport and I bought it used. It was about 12 years old when I got it. I always wondered why Chrysler starters were so damned expensive! They always sounded like they're running like a bat out of hell and straining to turn the engine over
Oh man what an ending. Can't wait for part 2. It's a blessing and a curse you get cars like this. Well, a blessing for us because it makes great vids!
What an ending....Eric O is a sadist...no doubt about it. It's almost as if the PCM was firing injectors and the coils presumably, to feed a 10,000 rpm engine! Flaky PCM, or flaky input to the PCM???
Can't wait for part 2.
A cliffhanger!!! Eric I think you have graduated from video clip to short film. Can't wait for part II. Keep up the good work.
Sounds like the old Jeep was riding the lightening a wee bit at the end there, Eric ;)
Wait a minute! Eric and Ivan both put out Crank no start videos on Jeep Libertys on the same day. My mind is officially blown!
Parallel universes!
MAN... ive been doing cars for 12 years now and i can pretty much hold my own working independents where im usually the only tech.. ive only once had a mentor who was as tech savvy and knowledgeable as this man.. unfortunately it was my first job at a dealership and i was not at all of the mind to be able to learn what he was showing me and maintain it.. i was still struggling with mounting tires lol.. oh how times change... after watching this video i realize i still have a lot of work to do and can be a lot more detailed in my diagnostics when some times i am not.. im still using Snapon Solus and really would like to make the move to the scan tool your using and learn to use it as you have shown in the video here.. very very good work!! i only know one man who works to this standard, he works for Dodge and is the #2 Tech in NY State. think one of only a handful to be certified by dodge to work on the Viper and other odd models like Hybrids they put out.. Prowler i believe needed certified techs to work on.. again, SWEEET video! best ive seen on you tube!! i request more in depth tutorials on the scan tool your using please
Great ending!!! The suspense is thick in this one. Sounds like you let the magic smoke out of some electrical composent. Judging from the green trace (CMP sensor?), it was something on that circuit. That engine is a mystery. Looking forward to part 2.
Talk about a cliffhanger! Cant wait for part 2! Very interesting!
I may want to say thanks for this video! You have given me a direction to go in concerning my Liberty aka "The Jeep from H*ll" because of the issues that I've been having. Because you posted this up, I'm hoping the direction you gave me will ultimately get this hemorrhoid vehicle fixed! Oh and btw, the number 4 & 6 plugs are easier to get to with the overflow tank unbolted and moved to the side.
Just going back and catching some of your older videos. This video was about the time we started having trouble with our 04 Liberty. About the same mileage also. Our lifters started losing oil pressure and making a clattering noise. Did the entire top end of the engine, new valves, lifters, guides, seats, everything. Lasted a two months and did it again. Never did figure out what was causing the lifters to lose oil pressure. Traded it in.
Did you notice before you replaced the crank sensor it took several revolutions before the tach started ? I'll bet it took those extra revs for the software to "sync" with only the crank sensor.
Okay...you shown several ways to check and verify know good and bad (ex..plug 2 and 4) so no waste of footage. But what a climactic ending...you got me on the edge of my seat and then fallen asking why end now. Recovered and patiently waiting for part II.
What a cliffhanger! I'm more excited for part 2 than any TV show I'm watching. Feel like SMA stickers should be handed out for this kind of suspense!
We need 3-D glasses, eh?
Looks like the ignition coil codes the ECM needs to See Crank Signal for the computer to Realize there is an ignition coil problem Eric O @30:08 @SouthMainAutoRepairLLC
I knew there was gonna be another episode since this was labeled part 1 but still! Better than anything on t.v.
Got that right
Id say this is the most intriguing SMA video yet. Can't wait to see part 2.
The CMP sensor signal went crazy as soon as it happened. Wonder if it is keeping the ASD powered and shorted CMP sensor taking out whatever coil it's synched to when it dies? It's the same 5V ref wire to the CKP so maybe one took the other one out? Just thinking out loud and can't wait to see what you found!
+Hayward's Automotive :) You may be onto something....
+Hayward's Automotive How could the shorted sensor tell the computer to supply continuous ground to a particular coil? I haven't seen the schematic on this, but I think this system is a ground supply, under PCM control.....sensors supply the inputs, yes, but ultimately, the command on signal for the coils comes from a ground supplied by the box, right?
Ignition coils have duty cycles. They aren't designed to be turned on 100% of the time because they're not demanded to.....So.....Could this be a continuous on condition, or an exaggerated duty cycle for whatever reason overheating them?
How do you mesh burned up coils with engine flooding?
+Clete88 I don't want to steal Eric's suspense so as he diagnosis the problem it'll all make sense plus I just took a logical guess with what I seen & wrote up above. Just trying to figure out what caused the fuel odor Eric smelled, burned up coils, bad CKP sensor and the stalling after the CKP sensor, coils and plugs were changed. It started cold and after getting heat soaked it failed. Hopefully he won't keep us in suspense too long b/c that was a sizzling ending to Part I.
+Hayward's Automotive Plus the fact that when Eric tried to start the engine the CMK signal was missing (Tach didn't jump) when he was cranking the engine. The engine only started after the cam signal was restored. Dr. O also determined that the PCM used a substituted CKP signal and that the CKP is really not needed to keep the engine running. So a bad CMK signal will cause the coil to keep on firing and also cause the injectors to keep firing, the reason for the strong gas odor. Let's hope that the CMK sensor or something related is the problem (bad wiring) and not the PCM or we can be looking past Part 2...lol
+Hayward's Automotive Amazing Eric had the scope on the right circuit at the right time. Imagine if he put it all back together and gave it to the customer to have it come back with the same issue and two new fried coils. That would be my luck.
New Crank Sensor and Engine Sounds Smooth On Camera Eric O @28:48 @SouthMainAutoRepairLLC
The suspense is killer. Man!
Holy crap! What a way to start a job on a Jeep! A coil in full meltdown mode!
OK, wow! Dat ending!
+Adrian Kingsley-Hughes Haha I just had too!
Wow, Way to leave us hangin'.
I love the way you are so honest with us by leaving your mistakes in. There are other youtubers that get it right every time, and you just know it's their second or third attempt.
But saying that-Stevie Wonder could have seen that cracked glass yesterday:)
Just kidding. Keep up the good work! Looking forward to part two, give me a clue, are there fire engines involved?
+Ted Nugent HAha Stevie Wonder could have seen the crack lol. No no fire trucks just yet!
Eric's honesty is one of the big reasons I like this channel. I know he's telling us what he knows and he shares his thought process. He isn't just relatively honest he is absolutely honest. I just wish you was down in Florida I would take my car's to him every time. Hey Eric did you know we don't have salt on our roads down in Florida? Hint!
Good one on the Stevie Wonder!
thanks for letting us in to your shop!! I can't wait to see what was wrong.
keep up the good work Eric O watched all your videos from over the pond in the UK
I just watched a clip from 5 yrs ago. About a fuel pump replacement on a 03 liberty w/ a 3.7 ltr. A big help. Been watching for a few yrs now. Thanks for the help. 🤔🤪🤬
Man I cant believe you did that!! Cut us off right at the good part. Sounds like the ASD relay chattering
Hey Eric, could you recommend a good OBD code reader that wont break the bank but will get the job done?
Interesting that it's starting In Flood Mode 🤔 definitely down on several cylinders Eric O @5:40 @SouthMainAutoRepairLLC
Wow! That sounds like another short happening! While you were saving the waveform to me it sounded like the engine was slowly losing RPMs. I don't know if it's true but that's what it seemed like to me
Im loving this..Eric'O baffled. All the videos that I have watched, I assumed that Eric'O knew everything but No NO NO...This is great, just great..Im waiting with baited breath for the next installment . My guess is that the board is fried, But it will be fixed with brake clean because that fixes EVERYTHING,,,Thanks Eric'O..
+Tosh twentythree (tosh 23) Haha stay tuned!
It's a jeep
There's your problem!
Great vid
+Phil Bourgeois Nah. Over the past 20 years I have owned 3 Jeep Grand Cherokees purchased new - 1994, 1999, and 2005. What I notice is that many owners of these vehicles maintain them like a 4 cylinder Honda - almost no maintenance. Then they blame the vehicle when it breaks down. If one keeps up the maintenance and repairs, which is very expensive, these vehicles are dependable and fun to drive.
+Sandbag1300 just joking around
I'm gonna show up at your shop some day. you are an absolute inspiration to me. just want to shake ur hand.
I had the same problem with a Ford F150 the coil driver would intermittently ground out. the truck had been at several shops and had 6 #3 coils replaced . The wire was chafed on the passenger side about 1 1/2 feet away from the PCM connector. I hope this helps. Check the powers and grounds @ the PCM and the battery pay attention to block and body grounds too. The PCM is protected by the PTC and will usually protect the drivers .
"I don't know what it is. I kinda want to touch it." LOL
+Chad Bob Haha It was true
Wow. That is some weirdness right there.
And that fizzing.......Wow.
Can't wait for part 2.
Oh man you can't leave us hanging like that. Make sure to park that tinder box outside the shop overnight.
Nutz4Gunz45 Or disconnect the battery.
Now that's a cliffhanger!!! Looking forward to part two.
+arcdraw Stay tuned!
+South Main Auto Repair I'm really interested to see what causes the misfire like feel. I have an 04 Liberty with the 3.7 too with the same semi rough idea but all the coils are good and plugs are new too but no misfire counts.
darn it eric what a way to leave a cliff hanger was that the natural sound at the ending or amplified
+crapper1 All natural.... No funny business...
I can't wait to see that part two!! That end was great! I hope you are ok!!
I purchased my Liberty with 169,+++ miles on it, 2 of the cylinders were intermittently misfiring. the coils didn't look like yours, but when I started looking at things, it still had the oem plugs in it! and after replacing the plugs (funny enough, I put NGK plugs in it!) it still intermittently misfired. I just replaced all the coils. I figured that they were done in by having to jump the > .100" plug gaps. and since I don't particularly enjoy being stranded, it was a safer bet to replace all of them.
Always get excited to see a new amazing vid Eric .
You are doing a great Job Eric!!!!.....this Jepp has a huge collection of problems!!!! that have been acumulating over time!!!....In my opinion you are solving them in the correct order one step at the time!!!...(in common words needs an exorcism!!! and DrO is the best I know for that kind of Job). I dont think that sound at the end represents a short circuit, because the second time the car starts again!!!...when something electrical burns, its gone!!! my guess there are some faulty conections of some sort!!! About the burned coils I have a couple ideas that wanna share with you. There are 2 kinds of sparkplugs, older distributor cars sparkplugs, and modern ones!! The old kind among their characteristics has low electrical resistance (between 0 to 10 ohms at most). The modern ones has a electrical resistor built inside the porcelain in order to filter electrical noise into the electronic system (about 1 to 10 Kilo Ohms)!!! If someone use the wrong ones in modern cars could result in to a burned coil overtime!!!....the other idea is that nothing last forever, coils gets hot and cold everytime, and plastic and epoxy and the coil dielectric enamel gets dry and toasty and shorts the overall turns of the coil, and burns!!! Just needs high quality coils, and plugs!!! Good work Eric!!! I cant wait to see part two!!!...Keep up the good work!!!! :) :) :)
The youtube mechanic universe must have aligned. ETCG just bought a Jeep to work on. He can now watch your videos and Ivan's to find out what you guys have been fixing on the Jeeps!
+The Disgruntled Mechanic yeah but having said that etcg has to do an engine swap , pretty straight forward , mr eric o has some investigating to do to see why this jeep wants to fry itself to bits ... we all have confidence in eric o he's the man for the job
+Leroy Baker hope he dosent wheld the engine in it.LOL
+The Disgruntled Mechanic Never fear Mike he is an ASE Master and will not struggle like I do everyday to try and fix cars. Someday Ivan and myself will reach that level of automotive achievement.... someday...
+radio control uk Oh man ETCG may be in for a surprise...swapping engines on these Libertys can be a fiasco! You'll see in my Part 2 :)
lets hope etcg sees your video before he starts , he may learn something before hi kicks off the project ... great investigation work on your liberty project though
I bet it's the green ooze somewhere. Eric the legend can sniff it out.
Hey Eric, At @27:00 you said that you unplugged the cam sensor so the fuel pump and injectors wouldn't kick on during the crank sensor bypass test... why would that work? I usually pull the ASD relay to disable that stuff :)
+motoYam82 Good question. I do not have an answer for, but I just observed with the cam sensor unplugged and you do a bypass test it will not turn on the fuel pump. The only reason I did it was because this engine had been soaked so much with gas previously I was just trying to prevent it a bit more. I know the bypass test turned on the fuel pump but I was not sure if it was firing coils or injectors to. Now that I think of it I do not think that it ill fire the drivers because these cars will not run on the CKP alone. However we did learn it will run on the CMP alone :) Just being cautious I guess haha, you know me safety 3rd!
maybe too much current into the coil's primary side! or shut the Jeep off and took the key out of the ignition and keep the scanner hooked up to the computer, verify if the Jeep was trying to start on its own! There is an issues with crank or cam that the coils remain hot even when the car is off.
OK, i'm halfway thru this vid and gotta throw in my 2 cents. Two wired coils are triggered directly by PCM. Dead short from primary to secondary winding (cracked or cracking body of the coil ) oozing insulating goop due a jump to ground or bad spark plug. The PCM is firing because of signal from bad CKP, or the CKP is bad due to a shorted CMP sharing an internal circuit from the PCM.
Where's a ballast resistor when you need one.
NGK ZFR6F-11G V-Power is actually the stock spark plug for this application. NGK makes a platinum variant as well (PZFR6F-11), but for some reason they no longer recommend it for direct replacement. Not sure if it's because of temperature or what.
Interesting that the same circuits - injectors, coils, CPS work in the same circuits or inline with the wire diagrams that the coil shorting could have taken out the Crankshaft position sensor? All those ignition components are working simultaneously together.
Btw, did you and Ivan decided to work on Jeep the same time? at the end, it sounded like you was frying and egg. Got hungry? Can't wait for next video... the suspense. Glad to see Hannah is back on video. Teach her everything you know.
+aengmax She is going to school to be a Dr. so hopefully she never has to fix her own car :)
Oops there goes another coil Eric, just my thought on this one, has to be the computer
being either hit by lightning (ya sure winter lightning? ) or someone reverse jumped the battery. Computer thinks engine is running at 10,000 rpm as one of your other viewers
stated flooding engine and overheating coils. I'll bet your 2 quarts high on the stick.
You b*****d! What a cliffhanger! Man those coils burning up was weird! I'm gonna guess at a bad ECM ground. Great video. Ivan has posted a liberty no start today as well!
That's an awesome problem lady!
These videos are great!!! I've learned so much.
Right at the end it sounds like some control system goes nuts and starts cycling something very rapidly. My first thought was the PCM firing one or more plug coils like lightning bolts.
+jwo7777777 Better stay tuned for the answer :)
I know this is an older video but a thought on the key on coil fire - if the crank sensor was shorted and not working - to where the engine died, maybe - that happened when coil 4 was on the fire trigger in the ecm. That could possibly explain why the coil appeared energized when you were doing the key on charging. just a thought.
What a cliff hanger!!. Run...Every person for themselves..
+ItsAlwaysRusty Don't run to far yet!
I had something just like this with a truck I had everything was going wacky when it was running.. But just setting it was fine and tested good and under the crimp at the battery was corroded so bad when it had a draw on it things were failing .
Building the suspense ! Leave us hanging another day !!
Very Alfred Hitchcock of you ....and I did hear the " I cant find the hole" line mumbled LOL
Best cliff hanger ever!
"I smell something that doesn't smell right" my wife has said the same thing, I usually just blame the cat. But I don't have a Jeep Liberty handy. ;)
on the first time, i'm thinking bad crank sensor keeps signalling as if engine is cranking and so the coil & injectors get power. I ?wonder why the coil burnt up though.. maybe the same thing happened again and stalled the engine etc..
could be a sudden current spike/short circuit..
waiting for part 2
EPIC CLIFFHANGER!!!! Cant wait for Part 2 -- on a different note I know your love of the junkyard well I work at one of the largest if not the largest auto scrapyard in the NE in Mass. We've already processed 6,000 vehicles in 2016 , I run heavy equipment there. I'll try n make a short vid for ya of the place I call it the Walmart of junkyards you would be in heaven there. we process 100-125 cars a day absolute insanity lmao
40:16 OE plug for the 3.7 is NGK V-Power (ZFR6F). I see you looked it up a little later, hehe
Mechanic? Or TV drama director... epic mid-season finale cliffhanger right there.
Eric, I suspect waterleakage to be the cause of both middle coils defected.
But at the end, ouch a bigger problem!!
Since we still don't know the answer, I'll throw this out there, I understand Eric gives a free set of tires on the the tough ones if you guess correctly:
Intermittent issue.....get the engine running and do the shake tests on the wiring bundles....could a broken wire assist in sending bogus inputs to the ECM? I don't know how the Jeep PCM might respond to intermittent power or ground issues, but inside the computing parts, they have filter caps that could keep the CPU going....the driver circuitry however?? I don't know..
Were we hearing a relay buzzing or were we hearing injectors? Remember, the motor was dead, so the formally quiet injectors operating could probably be heard much better since it was quiet....
Do you carry Michelins Eric?
great work man, i got a scope and i have the same signals
Wow was is causing the coils to burn up and crack that is bizarre 2 coils 1 on each Bank is toast Hmm 🤔 Eric O strange @44:02 @SouthMainAutoRepairLLC
Aw man! Did y'all hear that? Dr. O. said that he's human. I wonder if Vanessa knows that? And what the heck was that sound at the end? It sounded like it was something electrical. What a way to edit the video and make us tune in to Part 2.
it appears motoyam is having jeep liberty no strart issues , are the liberty jeeps having a revolution
Cliffhanger major TV production style!
That smoking while KOEO was really scary, imagine that happening over night....
Great vid! Also like the U of Hawaii sticker on the white board.
In regards to connecting the charger with the key on: I once connected a 20ish amp charger to a Ford Tempo with a dead battery while the headlight switch was on. The headlight bulbs flared on like flashbulbs and burned out. A couple of months ago my boss hooked up a 200 amp charger/starter to a Dodge Cummins while the key was on. We had to replace the PCM and a few days later the ECU had P0606 and had to be replaced. The Dodge might just be a coincidence though.
For a minute I thought you and Ivan were working together on this one. What are the odds of a same post, same title, same year same car same problem?
+Dave M Same symptom... different problems!
Oops..thats what I meant to say. Thanks for fixing that.
My first thought was that the main relay was sticking on. But at the end of the video I'm not sure. know the coil was smoking with the KOEO. My next thought is the wiring harness is shorted?
+Randy Charlton We will see in part II....
darn it , just like a sopa , gotta wait till the next one .... nail bitin time
OMG cliff hanger....Tune in tomorrow same, time same channel.
My commander uses ngk from the factory. However, if you get the wrong ones with too low of a resistor it will melt coils.
Engine light is partially due to the unplugged coil pack. Been there done that. with the 3.7 Libby..
What purpose does charging with the key on serve if any? The good thing is that you caught the melt down in action. That could've gone extremely bad.....oh no, now what. Damn, a cliffhanger! At least I don't have to wait for part 2 since I'm on a catch up binge. Thanks for the video.
Can't wait for part 2.
+Glen Harper Coming Soon!
Here's an experiment that I've done before. Hook your scope up to your battery charger. Look at the waveform. Every charger I've ever checked has never had perfect dc current. That could be why you've heard people say not to turn the key on, although I've done it dozens of times without issue.
In the Summer use 20W50 oil to protect the cylinders and engine. In the winter use 40 or 30 wt. Put antiseize on plug threads. Use silicone grease on plug wires.
Had a p0320, misfire, and few other codes on a Maxima. Replaced burned up coil, plugs, CMP/CKP sensors. Needless to say.. hours later working on the "ground" I found the problem haha
great job eric looking forward to part 2 ive heard of coils burning up from lean fuel mixture fuel pump? probably not in this case but something to keep in mind
Talk about a cliffhanger Mr. O 😱
NGK v-power, awesome plug. 2002 KJ Limited.
Sounds like the magic blue smoke trying to escape somewhere! Can't wait to see where! :)
Another quality Chrysler product :)
+ice44567 Got to admit when it comes to pushing the boundaries of the strange and wacky drive-ability issues Chrysler has cornered the market.
+Discretesignals I legitimately feel bad for them, because they try really hard, but they just have less money than everyone else. Therefore they have to cut corners that other brands don't, that result in random BS like this, that makes customer confidence in the brand sink further, which means they aren't making money. Vicious cycle.
+ice44567 A few of the Jeep's slogans throughout the years:
The toughest 4 letter word on wheels.
Have Fun Out There
Only in a Jeep
Jeep. There's Only One
Now those slogans make sense..haha
Discretesignals
Lol. The sad thing is I live in Toledo and pass the North Assembly plant every day on the way to work. These turds were all made here. I'm sorry that we unleashed these upon the innocent and unsuspecting (both consumers and guys like Eric who thought they understood car electronics pretty well) LOL
+ice44567 Believe me, I'm sure Eric loves those little challenges. I live for them. Nothing like getting something like that and solving the case. Jeeps/Chrysler are not all bad. Thanks to Chrysler, GM, and the rest I wouldn't have been able to buy the house I live in or bought all the nice tools I have.
Great video Eric as always. Very informative and I hope you figure out this problem as well.
You stated that in another video you had replaced the water pump on that Jeep. I was wondering if it got real hot and started the coils melting if it was losing coolant and then I watched the end of this video. Hmmm.
I had a Jeep Cherokee once - so I can go here: JEEP - Just Eats Every Part............I couldn't resist.....: )
That’s insane about the coil!
enjoy your videos run a mom and pop automotive shop in london ontario looks like you get the same hair pullers we do
Love to see part 2 of this one! Really interesting video Eric! :-)
damn eric thanks for leaveing us hanging im ready for part 2 lol