Jeep Liberty: Cranks, Starts, Stalls, Runs Rough- Part I
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- In this video we take a look at a Jeep Liberty 3.7 that was purchased from an auction and then towed into the shop from a local dealer. You could get the engine to start on occasion but when you did it had a lot of mechanical engine noise and would not idle. Let's see what we find. -Enjoy!
PART II "The Follow Up" : • Jeep Liberty: Cranks, ...
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WPS500X Pressure Transducer: amzn.to/2pzjrDE
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Cleanest used/broken motor I've ever seen! Could eat off that intake manifold. Wish mine were like that. Damn, now I'm hungry.
That Pico waveform was so cool! Awesome diag, Eric, would not have thought that a companion cylinder could affect the relative compression waveform like that...definitely learned something new :)
Would have been cool to pull out 1 and 3 plugs and redo it. Would have blown minds to see a "normal" cranking waveform with no plugs in it :D
Wait I have to think about that...damn you're right...mind blown haha that would be epic xD
i know im asking randomly but does any of you know of a trick to get back into an instagram account..?
I stupidly lost the account password. I would love any help you can offer me
@Soren Erik i really appreciate your reply. I got to the site thru google and I'm waiting for the hacking stuff atm.
Seems to take quite some time so I will reply here later with my results.
@Soren Erik It did the trick and I actually got access to my account again. I'm so happy!
Thanks so much, you saved my account :D
It’s a Jeep Thing..
!!)>
Does anybody want to know what the oil looks like?
same here, this sounds like it could have been easily avoided with proper routine maintenance.
Great troubleshooting Eric! Finding the root cause is more productive than throwing parts at it👏🏻👏🏻👏🏻
I'm impressed Eric, Great Video! Smart thinking👍👊💪
Yes sir, I followed along. Your explanation was easy to follow and the PICO screen on the video was really helpful in understanding what was going on. I'll be paying more attention to the Jeep I'm looking at on Sunday and ask if routine oil changes have been completed. :)
I love to watch how you work things out. You are an automotive savant.
What an excellent case study. I suspect many professionals would shrug and never explore it enough to find such compelling evidence. I was thinking it was going to be a timing issue, but then when I saw the spark coincident with TDC compression, I had to reconsider. Also I didn't jump at the most important finding, extremely HIGH torque to spin over those two cylinders. These are the problems that make auto repair so interesting.
I was wondering if you were going to end with “if I can do it, so can you...” ‘cause there’s no way I could have diagnosed that between my ears.
I LOVE these video using scan tools and the PICO scope!!! That's one think I would love to get better at is using those tools and knowing what I'm looking at when using them. Because they can tell you a lot of information with out touching much of the vehicle. Thank you for taking your time to film this and also editing it and posting it. I know your a busy busy man but it's greatly appreciated Eric!!! Hope you have a great day and will be looking forward to the next video what ever it may be I'll be watching it anyways!!! Life time subscriber!!
Can't wait for Part 2..!! 😎
Let's hope there is one.
Could you have pulled plugs 4, & 6 done another relative compression test and seen 1, & 3 return to normal compared with the 2, & 5 remaining plugs?
Sure could have :) ! Way to think like a pro!
To be honest, when l saw the initial capture l thought 1 & 3 were good and the rest had low compression lol
Excellent use of the WPS 500 Eric 👍 #picoflu once you have Pico it’s more infectious than influenza, you just want everyone to have it 😂
At right around 15 minutes I was getting anxious saying "just do a compression test" then came the words of wisdom that will stick with me for ever...." A compression test proves a cylinder can seal, but it does not prove it can breath" priceless advice right there.
However, a running compression test will show how it breaths, but ours does not run 😉
Was thinking exactly the same thing. Learned something new right there!
It does prove Kerryithm2. It proves the engine can seal :)
Thanks missed that
Damn Eric, you're amazing. First try, right on the money with the diag. I was stumped looking at that RCT but your idea clicked right away. Your channel has driven home the idea that a scope and good scan tool (as well as competency) are CRITICAL to a shop serious about diag.
Great video Dr. O. Know you have peaked my interest. Don't keep the public waiting ,we want the rest part 2 and we wanna see carnage!!!@Don't keep me in suspense all weekend. Chop chop, get those little fingers working and upload part 2 brother. All the best to you and yours thank you for the video .
Ok.. there's no way I could do what you CAN do... lol... sweet segment though... and I have a thought.. don't know if it would/should/could happen BUT... It would be a huge help to folks like me... (nubes) if we had a way to know mechanics/tech diags in our own areas that would be as or near as trustworthy as SMA... just sayin'... thanks Mr. O. from Jon O,,, Ida O.
This is what a very skilled mechanic looks like these days - fantastic work and teaching Eric !
No Dorman sticker on the magic white board?
Good day i have a 1996 keep lorado 4.0 the car starts an stalls immediately what do I start looking for
Sputterin', bangin', poppin', my kind of video! Sweet diagnosis and explanation. Thanks Dr. O!
This was excellent explanation and use of pressure transducer Eric. Thank you so much for taking your time to share your knowledge with us. Cheers
NGK are 👍🏻, but yes Champion used to be in all Dodge Chrysler Plymouth cars till they started using Mitsubishi engines... Then NGK🎉
Wow screen capture in the vid! You went all out for us folks Mr.O. Excellent as always, enjoy your weekend :)
Fantastic training video Mr O very much appreciated cheers sandy
Could also do another relative compression to see if the high points disappear if you don’t have a pressure transducer?
Excellent point!
Cliffhanger, but we all know that Eric O is not just going to leave us hanging. Nice format of letting "The People" see whats the picoscope is showing in real time. Thanks for bringing us along and taking the time to edit the video.
Was it the Autel ds808 that you used in this video? In another video you showed the autel ms908 programming keys. I am looking into a ds808 and would be very interested in a video comparison between it an others. Maybe a comparison between an autel, a launch, and an otc. not really a snap on tool, way out of my price range.
When I heard it crank and kinda run, my first thought was some kind of timing issue. Luckily you have the proper tools, and the most important tool under your hat, to quickly diagnose. Nice work! Can’t wait for part 2 to see what is the true issue.
STΔR- LᎾRD I’m trying to diagnose my Jeep Grand Cherokee right now! I could have sworn timing issue as it sounded the same way! For some reason my fuel system isn’t holding pressure with no leaks!! Even pulled injectors to look for one stuck open. Nothing lol. But you said timing lol that was my first thought as well with chugging and popping
How could this car be broke? ..... The engine bay is spotless.
its a jeep liberty thats the problem i rented one of those recently my gosh!!!!! what a horrible piece of crap that vehicle is i was shocked it only had 17,000 miles on it i have driven some real beaters in my lifetime but have honestly never driven something as crappy as that jeep liberty .this vehicle was rented from enterprise people do yourself a favor and rent your vehicles from someplace else they will lie to you give you a crappy vehicle and they dont care because your not a corporate customer!!!!
its a jeep liberty thats the problem i rented one of those recently my gosh!!!!! what a horrible piece of crap that vehicle is i was shocked it only had 17,000 miles on it i have driven some real beaters in my lifetime but have honestly never driven something as crappy as that jeep liberty .this vehicle was rented from enterprise people do yourself a favor and rent your vehicles from someplace else they will lie to you give you a crappy vehicle and they dont care because your not a corporate customer!!!!
When all else fails, start with the basics...suck, squeeze, bang, burp...how'd they do it in the 70's?
a 3.7l.....there's your problem...
😂 🤣 😂
LEX Maximaguy87 t
LEX Maximaguy87 😂
I have a '07 3.7 V6 Liberty with 180,000 miles, with routine maintenance - the only issue I ever had was cylinder 6 coil plug. (I decided to replace all 6) never had any other out of normal engine issues again. This whole situation in the video is avoidable by doing proper routine maintenance as the manual calls for.
I've seen up to the diagnosis of the exhaust valve not opening, now I'm excited to see what it looks like mechanically - and if exhaust shooting out the intake during the valve overlap did any damage while it was running (which you can see with the steep drop after that second 150psi peak in pressure) - edit, you talked about this literally 5 seconds after I unpaused the video lol
That very advanced diagnosis is not something everyone can perform! Well done. Thumbs up video.
Look at you doing all that diagnostic mumbo jumbo!
this video went perfectly with my coffee and donuts,thx mr o.
fonzo2525 🤗
Toast banana and peanut butter with a plate of homemade soup.
No mechanic where I live, would have ever come to that deduction without opening that engine up. As he often says, "sometimes you have to go slow, to go fast!" He stops, thinks, thinks again and proves his theories. Bam! Correct diagnosis! What was that 1 hour at most? Engines not all tore apart. 2 spark plugs removed and that's it. Oh hold on, phone is ringing. It's the 99.9% of the other shops calling to say, "dah! I've spent 4 hours on your vehicle sir, and i have no idea what's wrong?" "Do you want me to put a new engine in it for $7,000?" Lol
Very good explanation Eric. Thx for sharing your knowledge
Whenever Eric or Ivan does a video on a jeep, it reminds me of how todays manufacturers can take a fun to drive, easy to work on perfectly designed vehicle like the Willy's Jeep of WW2 vintage and turn it into a troublesome, constantly failing POS. I had the pleasure of driving around in one of the old olive drab open jeeps with 4wd independent suspension back in the service in 1968. The crap thats made by chrysler, Fiat today bears no resemblance in form or function to those great old OD jeeps. They should be ashamed of ruining an American CLASSIC.
Drove one of those old army jeeps in 68 as well
Weird how sometimes when a problem is occurring and you know what's going on but yet it's hard to put it into words. You can see the thing playing out in your head like a bad trip (or good trip)... I struggle sometimes when my apprentices are like hey bra how did you know to check that and I'm all its the chi young man. The chi told me. Haa. I'm an electrician with 22 years in so I dig on your wave forms. Troubleshooting is troubleshooting no matter if its a building or a washer or a pooched jeep car. Keep on Keepin' on bra
Like my 7th grade substitute power mechanics teacher said about every engine in the classroom that day, "I THINK IT'S YOUR VAAAALVES!" in his deep, South Carolinian drawl. 😁 That phrase has been said early and often around here ever since, no matter what the actual problem is, LOL! 🤣
Can't wait to see under those valve covers!
Understanding what the diagnostic equipment is telling you is the hard part. You're experience makes it look easy. Well done.
Great analysis Eric O. Can't wait for part two👍
Smart to auction it...not sure about buying it though. Probably doesn't smell like cigaweed though lol 😁
It's a Jeep and runs like poo. WHAT'S THE PROBLEM? Seems pretty normal to me.
SMA = So Many Answers!
Dang man ur a wiz at diagnosing cars.. Right on Eric 👍
Nothing like a plate full of maple syrup with a few pancakes & sausage to go with a SMA video on a quiet Saturday morning :D
i'm working on a dodge nitro with the exact same symptoms. i checked engine vacuum and i would get about 5 in of vacuum, and i had 150 psi of compression on all cylinders.
To the inexperienced person doing a relative compression test with voltage instead of currant could have really gotten screwed up by thinking all the other cylinders were low instead of the 2 cylinders being to high. Great diagnostics Eric hopefully with you, Keith, and Paul I can be that good someday.
My mechanic doens't like to bad mouth any shop, bad mouth any car brand , but the one day he said
don't ever buy Chrysler , Jeep Dodge. Suspension are junk, they are just junk...run far run fast.
And i would agree, as much as i would like to like them.
These are good vehicles if taken care of. I have an 04 with 120000 miles and runs like a champ still.
Nice video! Not knowing typical peak starter currents I would have suspected 4 low compression cylinders and been dead wrong. Your experience once again pays off. You could have, however, just pulled those 2 plugs and re-ran the relative current test. That might have sucked some crud into the cylinders but would have been just as definitive.
I love your channel. Can't wait for part 2. Yes pressure transducer shows how the engine is breathing. I was fortunate to be trained by the best. John Thornton. Guru of in cylinder pressure testing.
One of the best diagnosis yet. Impressive use of the noodle!
How can you get anything done with Scotty staring at you all day long??
I learned more watching this video than trying to study it for 3 weeks
Nice Diag. my friend, and thanks for the files. I have been wetting my feet with the scope and Pico software when time allows at my shop. Yep boss is one of those guys all about get it out quick. He would rather shoot the parts cannon at something then spend the time pinpointing an issue. I do it right anyway (shhhhh). Keep them coming brother.
I'd much rather have a guy make the right call the first time instead of "being fast." Fact is, you could have told your boss in one hour, 100% what was wrong with this car :) Remember, your tool box has wheels on it for a reason.
Brilliant diagnosis!! nuf said
Just great stuff, Eric! Like a detective story. Also could test your theory by removing the #4 spark plug and then the starter current for #1 would return to normal. You love your trade and want it to be practiced well. Thanks.
Gotta love 'Auction' vehicles, once fixed it will end u on a dealer lot somewhere--I think I keep my 96 ZJ with 148,000 and the 5.2
100 thumbs up if I could!! I love watching you go through the diag process!!!
are the 08 caravans with 3.8 bad or pretty decent
NGK is actually very good. Flip the haters (I'd use a bad word but this channel is family friendly)
I agree! NGK is what I use in my BMW and she is REALLY fussy :)
When Champion was bought up along with ANCO and a gazillion other strong branded manufacturers, quality took a real hit. That was of course many moons ago in the early 90s. NGK and Bosch seemed to always be leaders in plug technology and overall quality.
I was getting new plugs for my 2004 F150 5.4 3 valve which of course is an unusual plug and NGK does not make one for it. I brought my DVOM to the store to check resistance on the Motorcraft plugs and had to go through about 35 plugs to find 8 with an acceptable resistance. Most of them were very high in the 8-9,000 ohm range with a few up around 12,000ohms while a good plug resistance value should be around 4000ohms with 5000 being on the high side of the acceptable range.
I have always used NGK's whenever possible and they have always been the best when it comes to quality control on their resistance. It's rare to find a new one with more than 4500ohm.
I see why there are so many coil failures nowadays. People are putting in new plugs that have 8-12k ohms resistance and it's overheating the coils.
NGK is the premium brand in the UK, for spark plugs at least, I use them in everything by conscious choice and never have an issue in fact removing Bosch plugs from VAG cars and putting in correct NGK has cured some running issues for me
The Older Jeep/Chrysler we're very picky about wanting only old fashioned Champion Copper plugs.
No idea why.. Eric has mentioned in other videos that Chrysler products seem more sensitive to minor electrical differences in sensors etc..
Great video as always Eric.. keep up the good work.
Saludos y gracias Master desde México bendiciones
JEEP = Just Empty Every Pocket 😆
blacktree666 I’ve learned this the hard way. Bought a Jeep Commander 3.7 a year ago and have been dumping money into it ever since.
Have 2 wj's, yup but for some reason I still love em. Must be a Jeep thing
Amen. Except the 4.0! Well then your emptying them on aftermarket goodies!
yeah what bob moy says :-) love your videos Eric
Awesome Diag Eric. I really need a pico
Nicely Diagnosed Eric. Scanner Danner would have wrote an Novel, and a Sequel about it, and that's before lifting the Bonnet.
You should teach this stuff at a university man
They'd never let him in, he's not politically correct enough.
plus never making it through high school proposes a problem haha
Ain't no substitute for a degree from the school of hard knocks.
Having a degree and being "book smart" still makes for some dumb asses with no common sense. I have seen people with a ged running a successful buisness.
NGK plugs are junk.....and I do talk like that.....lol
Thanks bro...really learnt a lot from you.
Awesome, love the new "screen grab" feature, sort of like Louis Rossmann channel does for his Apple repair videos
Sounds like it popped a rocker arm
eric is a wizard of smart on the engines.
Ahh such a pleasure watching you diagnose while I'm kicked back feet up drinking coffee...and I didn't get dirty or have to clean up after...semi-retirement is good. Great video Eric and diagnosis as usual. I could watch you work all day :D
New motor and a new TIPM.
all in do time I am sure haha
Awesome diagnosis...and very educational! And yeah, NGK was (is?) the OEM supplier of spark plugs for Chrysler products...mine has them.
Chris Freemesser the majority are champion, but I believe some engines were ngk. I work in a Chrysler parts department and every one we stock is a champion with a mopar logo on it
Somebody man handled that Jeep.
Excellent call Mr O. An alternate way of proving your theory might have been to just remove one plug from a cylinder believed to have no exhaust valve. The relative compression test should now show one of the high current spikes now become normal.
100% correct
Came here 5 years from the future……weeeeeeeeeeee :)
Chrysler keeping mechanics everywhere in business
Kinda like DIY'ers keeping professionals in business
Ian Weston just the ones that don't watch sma
Certainly true for me... :-)
Love the live screen recording!!! Stepping up your game man, FLAWLESS! 21:25 is PERFECT!!! Your face beside the screen capture explaining it. Only thing that would have been better is if you could have drew a line on the screen showing what the normal waveform exhaust bump should look like. Awesome work Eric.
omg is that a Scotty Kilmer sticker
A fine logical experienced diagnosis. Should've been an MD!!
You're shared time and knowledge is always appreciated my friend. My AESwave shopping cart continues to fill
Professional tools and knowledge for the win! Nice job pinpointing the problem Eric. Sometimes you really surprise me. haha
I try to remember all that you taught me but man, it is a lot to take in.
My sister, who is currently having intermittent issues with her ‘ 05 Highlander shifter release (suspected brake switch issue) and frustrations with the stealership mechanics, just referred to you as “the car whisperer”. Yeah I like it - South Main Auto, the car whisperer. It sings! No “There’s your problem lady” for her yet.
I'll bet there's a banana in the tailpipe.
How did that other garage drag that thing home from auction with it barely running and sounding so bad? Would like to know what they paid for it.
Yup now we wait for the customer to say open it up . Great video as always!
Can't wait for Part 2
I wonder if cars like Toyota and Honda have such good reputations because people who buy them take better care of them than people who buy American cars. I know Toyotas can have serious problems if oil changes are not kept up.
Pook Atim Honda and Toyota sell very few cars to rental fleets, which buoys residual values throughout their lives. At the 8-10 year mark, when major things start to break, the Japanese cars are still very much worth fixing.
True. But you know what would be interesting? A study where equal class and cost cars, Japanese and American are put to a long term test where both are equally abused and neglected and see which one prevails. Perhaps they could go three times the recommended oil change interval. Have no proper washing or waxing. It would be interesting to see which ended up more badly damaged as well as which has the most breakdowns and highest repair costs.
This is a bigger cliffhanger than who shot JR. Thanks Mr O
In other words, operating normally.
Damnit man! I cant say enough about your diagnostic procedures. While i have plenty of my own automotive knowledge, im currently in school for diesel technician and what im learning is the difference between a good tech and a bad is how they diagnose.
Instead of doing the test with the pressure transducer it should be possible to verify by pulling the number 4 plug and running the cranking amps test again. Since the exhaust pressure will come out the spark plug hole you won't see the amp spike on the opposing cylinder. Of course the amp draw for cylinder 4 will be low but you would know to expect that.
Cool diag. Most definitely faster than the old skool