2006 Jeep Liberty Stalling Problem

[@ismarmeskovic]

11 th commandement by bernie thompson - in scope we trust 💪

[@kennedysgarage3281]

Doing my usual pause & rewind,I noticed the high then low reference point ever 720 degrees @ around 9 to 10 mins. Just after that you explained the over sight while recording. But Bernie you are savage, I really do love your tutorials. I sometimes feel very small in comparison to you, but I'm delighted you decided to show that its ok to make a mistake. Your my Yoda

[@gregjones8501]

I need to attend a class alongside Bernie for a week! You are truly an inspiration to many inspiring techs such as myself and I’m sure thousands of others! Thanks for the videos and taking the time to make sure we that we are diagnosing our customers vehicles correctly!

[@1977medavis]

Bernie you are a master of diagnostics. I hope to be as good as you one day! Keep up the great work and videos!

[@geoepi321975]

You will be if you have a clear mind

[@themechanic6117]

Very interesting. I was sure we would find a bad ground. Amazing work as always. Your method is 100%

[@detzlerangela]

I have a 2007 Jeep liberty. Two times this week I turned my vehicle off for about 5-10 minutes, then went to turn it back on. And it was wanting to stall out. It was pretty bad. But I managed to get it started by pushing excessively on the gas. This video made me think outside the box for possible part failures. Thank you for being so clear and understanding. Tomorrow morning I will take it up to Auto Zone for a scan for codes. Then over to the shop for a oil change and hopefully they can use the same scanner tool you have to figure out the problem. Thank you!

[@djosbun]

Thank you for another amazing video, Bernie. You preach about testing and let the results guide you to the next test and you're correct every single time. Thanks for being a great teacher!

[@PineHollowAutoDiagnostics]

That's a crazy failure!! Scope to the rescue! No way to diagnose that one without a scope :)

[@dans_Learning_Curve]

Ivan, maybe I missed it, but why did the engine stall when a power load was added? How dis a power load cause the sensor to stop reading?

[@simonparkinson1053]

@@dans_Learning_Curve Later in the video Bernie said it was just stalling after a time whether or not electrical loads were added. The original report had been misleading.

[@PineHollowAutoDiagnostics]

@@dans_Learning_Curve Great question Dan, I was wondering the same thing! Bernie said that it was a coincidence. Maybe the sensor was on the verge of crapping out, and a slight change in rpm made the fault show up more regularly?

[@scientist100]

@@PineHollowAutoDiagnostics could be when the engine gets hot it starts to act up as he mentioned later in the video that it would randomly die without any load, we all know that sensors tend to act up when heated.

[@HouseCallAutoRepair]

I can't wait until Spring!!

[@reggieshowtos9164]

Great diagnosis. Shows that scope gives a big contribution to car diagnostics.

[@davidblaze1652]

Bernie is the man no doubt about it. He even crawl underneath the car. All my respect for this working man 👍🇺🇸

[@TheKidAustin09]

This guy makes me question if I’m even a mechanic 😂😂 he’s seriously amazing at what he does

[@robertsmith2956]

Technician. If he was a mechanic he wouldn't need a shop to put in a sensor. I don't blame him, engine gunk and laptop screens and keyboards hate each other.

[@nueyeminor9891]

You are the best and truly dedicated to the solution and use exact an exact formula for the solution. I enjoy your presentation.

[@FinalStopMobileAutoTech]

Pure gold Bernie. I really truly love your diagnostic process and aspire to master it as you have sir. Your teachings have helped me, and the shop I am entrusted to operate become successful. because of you I am able to comfortably provide for my family. Thank you Bernie.

[@roxanneabbott8424]

Bernie I know I'm a female! I watch all your videos and am impressed by your diagnostics and your brilliance!!!

[@josesuarez1248]

very well, excellent diagnostic Bernie

[@ganeshnarayan5505]

As always Bernie you are master of diagnostics.

[@jgeorges3061]

Bernie, wow what should i say AWESOME/BRILLIANT it really comes in the end to the power of the SCOPE and the information the scope will show you what is going on thank you sir really enjoyable to learn from the master.

[@marvinpostadan3484]

Watching his videoed convinced me to buy his equipment.

[@TheCrazy243]

Master diagnostician! Great video. Learned a lot from you.

[@marksprague4454]

Awesome! Still getting on the ground to get it done. That is great work. I look forward to the videos and keep em coming!

[@macdonaldsmotorworks]

I too love your approach.. figure it out.. don't fire the parts cannon. I hate replacing parts "just because it might be". Thanks for illustrating how diag should be done.

[@1b9e7n3z]

Thank you, You bring us, the mechanics a lot of knowledge, I think never see a teacher like I have in my beginning but here you are, thanks again

[@kinglangren]

There still is definitely a correlation between the fan and the crank sensor, maybe the fact that the sensor was bad it was effected by any slight variance in current change... brilliant diagnosis thanks

[@scientist100]

I will save or sell my Pico 4425a to get the ATS diagnostic kit but I think it is over my reach before I start; for now I will use my Pico to save up, etc. I like the combo here.

[@terminaldiagnostics5576]

Brilliant logical approach I totally enjoy your videos best on KZbin for us Tech's to aspire to brilliant

[@adamapsitis6325]

Knowledge and skill on another level 🤯. I am trying to fully understand the process here, so it makes sense that you would collect data from the ignition coils and injectors as these are providing the engine with two of the three fundamental elements required for running (Fuel and Ignition) it also makes perfect sense why you looked at the cam/crank signals as these are the inputs used by the PCM to determine fuel and ignition timing. I guess what is key here is to look if the outputs (Injectors, Coils) cut out before the engine stops rotating. I presume if this was a bad fuel pump the outputs would keep operating until the engine stops. If you did not have an input issue like in your case study, where would you go next and why? Cheers, Adam.

[@stephenmarshall5302]

Brilliant as usual bernie. Thank you. Keep them coming

[@joeandgod1]

How does turning on the AC affect the operation of a bad crank sensor? A bad crank sensor is going to be a bad crank sensor regardless of anything else is turned on or not. This sounded like a bad ground.

[@spot-onautomotivediagnosti7583]

Bernie is beyond genius I swear.

[@nueyeminor9891]

Will it be cheaper to ship my 2006 3.5 dodge charger stalling issue to you or fly you to Texas?

[@baxrok2.]

Interesting especially since the previous vehicle had a similar anomaly yet wasn't affected by it. Thanks!

[@mikechiodetti4482]

You were able to see it quit. I've had intermittents that did something similar. Two 1997 GMC Mini vans with the 4.3L V6 engines over 100,000 miles on the first van, had the same intermittent stalling, usually on the road. It took a lot of driving with my old two channel scope and DMM ( it was over 15 years ago when I had these two intermittents) to find out it "could be" the ign module or ign coil. When the intermittent had shown itself, I finally had the scope positioned to show the computer timing output which was sent to the external ignition module. The module in turn toggled the Neg side of the ignition coil which then sent the spark through the distributor, the spark plug wires and the spark plugs. With the scope on "flight record," I saw when the engine stopped, the signal to the coil from the module stopped, but the engine took time to fully stop. During that ramp down time ( of the engine) the PCM was still sending the computer timing output ( 5 volt square wave) indicating the crank sensor was still sending the signal to the computer. Without the old Fluke 98 scope it would have been fire the parts cannon! As it was, the spark plug center electrodes were worn down to the insulator, the ignition wires were original, and possibly the ignition coil was stressed due to the worn out plugs. After replacing those parts, no more intermittent stalling.

[@avian7999]

So why did an electrical load affect the the failing sensor, did it lessen the sensor's ability to produce a signal momentarily causing the engine to stall?

[@tjmhlw]

Bernie you are the man do you have a text book series about scopes

[@jdtractorman7445]

I've never worked on a Jeep Liberty and I was thinking either crank sensor or cam sensor issue. The added electrical load is putting added stress on it.

[@rickcoleman8903]

My favorite diagbostician.

[@cullenmiller8170]

Great Video. I wish I could get the training and the equipment to do this kind of work. I always enjoyed the trouble shooting when I worked on older cranes. I just missed the boat on the computer stuff.

[@simonparkinson1053]

There is so much fundamentals training on offer for free on KZbin, such as Scanner Danner, Schrodinger's Box, then you've got the awesome case studies such as these from ATS, Ivan at Pine Hollow, Eric O at South Main Auto and many many more. You don't have to start big, any scope is better than none and there are some good 2 channel scopes out there for little money. 8 channels on the ATS Elite lets you capture more signals at once, with fewer channels you would have to run the tests multiple times to build the picture but you could still do it.... as long as the fault could be reproduced on demand or was occurring frequently. If you noticed here, by observing the 8 channels simultaneously, it was easy to see the relationship of cam, crank ,coils, injectors and power - and then quickly deciding which ones *weren't* an issue, hiding those traces allowing the problem ones to be focused on.

[@cullenmiller8170]

@@simonparkinson1053 Thanks for your kind words. I do watch Paul, SMA and a couple of others. I enjoy watching those guys for sure and have learned a lot. There's your problem lady. :-)

[@simonparkinson1053]

@@cullenmiller8170 Cheers! When the time is right for you, you can progress to established training providers, that's the route I took. These ATS case studies are excellent demonstrations of diagnostic process, starting wide and ending with a pinpoint focus

[@dannyryder1]

Thanks Bernie! Great diagnosis as usual.

[@eddieg329]

sir.. awesome work ..i can only wish i had you near me..i have the same jeep ..with simular issues and for the life of me i can get it to do is Job... will need to get my hands on that os/ scope

[@GraditelMacedonia]

True, and thank you.

[@autodiagnerdzllc8966]

Great video Bernie! Thank you for clarifying he video.

[@samcripes3046]

He's screaming at the end. Been there. Thank you.

[@stevenlee1544]

I LIKE THIS GUY AND I NEED TO HIRE HIM!!!!!!!!!!!!

[@pyralux01]

So the alternator and computer are free....right?...... or are you going to put the old ones back on....

[@alexlongpre4527]

Maybe I missed it, but what was the correlation between the signal not being held to ground long enough and the load on the charging system?

[@billsmith2212]

Too many shops change parts as part of THEIR " diagnosis " . I would guess the alternator and computer cost about $ 1000.00 installed . The vehicle then does the exact SAME thing . I don't see how they get away with it . Lube Tech , maybe - if they use the correct fluids . Technician - definitely not . This is what happens when you use your BIG TOE instead of a scope .

[@dans_Learning_Curve]

I wonder if the customer got charged for those items?!

[@troutjunkie7330]

@@dans_Learning_Curve You bet they did

[@nueyeminor9891]

That's what's going on now I changed TCM, ECM, BCM ,Throttle body, injectors ,coil pack Ngk spark plugs, air temp sensor, both fuel pumps and still doing the same thing. Hard to start, run until it idles down and cuts off. Unless I keep my foot lightly on the gas and it stays running. Is it the crank or cam shift sensor.

[@joeluang8695]

Large electrical loads briefly loads the engine speed and consequently changes the engine cadence. Hall effect type systems are very sensitive to frequency changes and thus the change in engine cadence exposes a defective crank sensor. This is one of the reasons why I prefer Hall effect type systems over VRS systems, they are much more sensitive and simpler in design, to approach this level of resolution, GM uses two VRS sensors!? Despite the hate and lack of funding for development those Dodge boys can still compete with the best. I believe Chrysler could have implemented a filter for a small glitch like this but - why would anyone not want to know of an early impending failure?

[@sheldonx3283]

Joe luang - that's exactly what I was saying!!! If the pcm tolerance is turned that closely for the hall effect sensor to detect malfunctions, then it should at least trigger a pending code in the PCM for crank sensor performance / intermittent. Then after repeated occurence it would set a store code. Manufacturers trying to cut costs in software development!!! As expected from Chrysler! Instead they investing in SGM trying to lock technician's out, stating it's for security reasons. 👎👎👎

[@zach914v8]

Man I learn a lot from you! Thanks for your vids!

[@mc996cars1]

You are the best Bernie! Keep up the great work and Thanks for always sharing.

[@bartscave]

Wow! Still can’t wrap my head around how the electrical load was related to the sensor failure. I suppose it is just a coincidence. I was expecting a bad ground or battery.

[@rauls300ce]

Bernie mention that it was not the electrical load it was a coincidence the only problem was bad crank sensor.

[@joeandgod1]

@@rauls300ce So it was a coincidence, that every single time you turnedon the AC, the crank sensor would act up? That was the biggest coincidence I've ever heard of in history.

[@richardbrown3025]

Could it be possible that any load put on the engine slow the RPM and push the crank sensor into the fail mode

[@googacct]

I was thinking at some point in the troubleshooting that a probe would have been connected to the fan motor power to check for the coincidence between the failing cam sensor and the fan motor turning on. That might have helped decide sooner that the two were not related.

[@robertmullen2480]

thanks Bernie! great capture like your channell

[@richarddiaz591]

Wondering why it wouldn't activate the CKP CEL.

[@darrenogorman121]

Micro amp clamp the signal wire?

[@shaunsautorepairs5410]

you can hear the frustration in his voice at the end....please guys test properly...dont be a parts changer

[@tharakanuwan9986]

Big thumbs up . Nice work

[@thomas5223]

nice job

[@shawnbauman5463]

Love the passion. I get the fustrating bit about shops guessing. I don't get it either. I'm not 100% perfect but if you prove what is wrong with logic/testing/data you'll be right 98% of the time. The other 2% you missed a step, didn't have the whole story, or overlooked something.

[@kennethbode2017]

you have great passion for your work.

[@neverstoplearning382]

Many thanks again sir. God bless.

[@ramonsolis3967]

Would love to be his apprentice!!

[@bornforparadise7517]

Great diagnostic , excellent just excellent

[@jcmobilediagnostics8611]

Do you need a scope? Yes, there would’ve been no other way to see that fault!

[@Lambros_Stefaneas]

congratulations. RESPECT.

[@markhollins2190]

A computer and ALT was replaced my God😵 always check your wiring...

[@euroauto61]

Another great video from Ats thank you!!!!

[@johnbonifas6040]

Who the hell would do a thumbs down this was a great video good job God bless

[@IAMNOSLEEP]

Thanks for sharing Bernie... Cheers.

[@stevenkietzke5582]

Nice description and explanation Thanks

[@toddw.9845]

Good work Bernie !

[@tjmhlw]

Have to get the escope

[@JoelAutomotiveInaction]

thanks you Bernie this are real diagnostic

[@robertmobileman8304]

wicked video Bernie thanks

[@DependableAutoTruck]

why did the fan control make it die

[@1vaquita]

not explain how affect the load to the sensor

[@jovangomez9380]

can you help me own a waveforms books

[@richardnilsen5]

Too easy for bernie A superstar showing The pee wees how to do a simple diagnosis ♦️♦️♦️

[@joeandgod1]

Good diagnostics, but this video made absolutely no sense.... How would the AC(blower motor/AC clutch) cause the crank sensor to fail at the exact same time that it was turned on?

[@rafaelvasquez3566]

Excellent informed 👍x100

[@oldschool9746]

Why would anyone give this a thumbs down?

[@stewartboucaud9919]

Awesome job. I love your videos.

[@4wheellife447]

great content ❤️❤️

[@scorpiodurango6163]

Thank you my good Sir❤😂🎉

[@juweekhan]

Well done another great video thanks

[@peters1821]

Great job as always!

[@hightttech]

Hey, i needed ignition key just like that after my van burglarized 😆

[@MaicSalazarDiagnostics]

What it shuts down only when ac or lights were turn on?

[@PineHollowAutoDiagnostics]

Hey Maic! I was wondering the same thing bro! Very strange coincidence :)

[@Discretesignals]

Maybe the extra noise on the ground system with loads turned on amplified the failing component in the sensor?

[@MaicSalazarDiagnostics]

@@PineHollowAutoDiagnostics I was expecting a bad engine ground or something like that. A guess it also happened with no loads.

[@ismarmeskovic]

@@MaicSalazarDiagnostics yup bernie mentioned that later

[@patburnsent]

@@PineHollowAutoDiagnostics Ivan, this is the first video I've watched from this guy. Why no codes set?

[@aymenmohamed1134]

Awesome

[@WissamAbbas]

awesome thank you

[@sa432jh]

Crank position sensor , known fault

[@HristovRumen]

Amazing

[@techautomotriz138]

Thanks, that's true

[@joekeefe3229]

Thanks for back tracking, I saw the 2 high traces and wonder that cant be right. I take your diags as bible truth and you showed again that tho your human you still succeed

[@luisenriquesandovalquiros4302]

Saludos desde Costa Rica kike de taller Pit Lane . Gracias por compartir .

[@sargetester99]

Deguass the sensor.

[@SuperMarioDiagnostics]

I love the ones that can't be proven without a scope!

[@turningwrenchesautorepairm5017]

12th command by Bernie T- stop and slow down

[@fp8007]

👍⭐⭐⭐⭐⭐🤓😎

[@caseymiller7911]

I bet this guy goes to work so he can get away from working on cars because I’m sure his entire family and friends group are hounding this guy every day to look at their cars.

[@mike-yp1uk]

Slam dunk again