Chevy 2500HD With A Bizarre Running Issue

Рет қаралды 212,875

5 ай бұрын

In this video I have a look at a customers 2001 Chevy 2500HD with the big 6-oh and the customer states it runs very poorly as soon as it warms up. A little bit of time looking at some running data we soon discover a huge problem in the fuel trims and notice the O2 sensors are not working like they should. Sounds easy enough right?
-Enjoy!
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@G31mR 5 ай бұрын

"If I'm wrong, we'll delete the video and pretend it never happened." Made me chuckle out loud. You are not only a top-notch wrench, Mr. O., you are a great story-teller. Your kids are fortunate.

@YOUZTUBE2000 5 ай бұрын

Thank you Mr Eric O for inviting me into your shop! I never mind the sound of the furnace, compressor, telephone, and Josh working- oh and your neighbor cutting his grass (he must be scalping it). In my opinion that’s what makes this shop/ channel so great!

@waynebake1123 5 ай бұрын

Don't forget the "Hey it's that guy" guy.

@richard3141592638 5 ай бұрын

Don't forget the lunch time siren

@ToddKing 4 ай бұрын

I don't either. It's part of shop life. I lived it for most of my life.

@frankmuschetto3385 5 ай бұрын

Great diagnostics. Most mechanics would have shot the parts cannon and replaced O2 sensors; of course to no avail. The truck owner should be super appreciative that your superior diagnostic skills have enabled him to continue to enjoy his truck. Happy Holidays to you and your family.

@mariosaccoccio1688 5 ай бұрын

Eric didn't need to fire the cannon, apparently, someone else did!

@dennyoconnor8680 5 ай бұрын

Hopefully that rolling wreck wont kill some innocent other driver when it falls apart.

@RaiderWolf-yd6nm 5 ай бұрын

@@dennyoconnor8680 _Hopefully that rolling wreck wont kill some innocent other driver when it falls apart._ As are many I bet in New York and the rust belt. That truck is far from an exception most likely. He isn't an insurance adjuster so as to total a vehicle, which such a vehicle is frequently worked on by South Main. In short, that's no where near a unique case. If you are concerned and live in the rust belt, move.

@McBuggs. 5 ай бұрын

@@dennyoconnor8680 Hopefully after the owner finds out from this video, they won't be driving that rotting pile for much longer. I know it'd be a wake-up call fer me!

@brucelittlefield9280 5 ай бұрын

I’m a retired Boeing electronic engineer. You have explained it extremely well, you’re really great at this! I’ve learned a lot from you. Thanks buddy!

@ua7pyro591 5 ай бұрын

Lol

@shakey2634 5 ай бұрын

Hmmmm….. I see some other KZfaqrs that poke holes all the time. Great stuff as always!

@andrewhigdon8346 5 ай бұрын

@@flightforensics4523happy holidays fellow Charlestonian!

@mikeissweet 5 ай бұрын

I design low voltage circuits and sensors for a living, and I'm always impressed by your grasp of electronics. You nailed this diagnosis and did a great job explaining it

@SouthMainAuto 5 ай бұрын

Fake it till ya make it is what I do

@jasontexter1721 5 ай бұрын

So you gonna redesign the "weather tight" connectors 🤣🤣

@lannyellison5950 5 ай бұрын

Sight unseen I would bet and take a chance to his getting it designed! He speaks like an electrical engineering Career person!

@280813jb 5 ай бұрын

I was an old computer technician from the late 1960s, so no more pull up/ pull down resistors to eliminate floating electrical signals?

@mod_incllc3235 5 ай бұрын

@@SouthMainAuto No, this one was a masterclass. Thanks for taking the time to explain. I for one learned something new today. Excellent.

@davidmueller2780 5 ай бұрын

The excitement in Eric’s voice when he discovers the thats your problem lady is worth the video itself!

@jasonaltham7013 5 ай бұрын

Had a 6.0 2500 GMC truck where the engine would run fine in open loop but when it went to closed loop would lean out all bank 2 cylinders. What was happening was the ac drain was dripping water onto the B2 S1 sensor connector, shorting the 12v heater ckt to the sensor signal circuit, creating a false rich exhaust condition. The ECM would try to lean it out by reducing injector pulse width to the point all 4 cylinders would misfire.

@SouthMainAuto 5 ай бұрын

There ya go. That's a good one!

@harrywalker968 5 ай бұрын

thats factory,,isnt it.. why i dont buy modern ve hicles.. too much sht..

@larryberry2436 5 ай бұрын

Good diagnostic skills on your part. I hope that you got paid for your knowledge.

@jasonaltham7013 5 ай бұрын

1 hour to replace the o2 sensor and grease the connector/ check terminal corrosion plus diag. About 40 bucks.@@larryberry2436

@JoseSilveira-newhandleforYT 5 ай бұрын

Great diagnostic strategy, Eric! That problem could send many heads on a wild goose chase.

@LasVegasVocalist 5 ай бұрын

I always love your explanations of things. It's always detailed and very thorough. While I'm not a day to day mechanic, your wisdom helps me better understand how things work under the hood, and I love it. Thank you for your service to the community.

@andrewl9472 5 ай бұрын

I’m impressed, both by the bravery it took to stand under that truck, and also by chasing a weird voltage reading on the scan tool down to a pinhole in wire insulation and salt. I had no idea that those circuits were that touchy.

@jonnyrockets4756 5 ай бұрын

No way anybody would have found that. Your a frigging genius.

@andyca15 5 ай бұрын

Remember kids if you are doing the hokey pokey always remember protection, or someone is going to get salty, you'll have someone scoping your undercarriage and get a huge bill.

@rmproute66 5 ай бұрын

Per an old saying, “You Do the Hokey Pokey and You Turn Yourself Around, That’s What It’s All About!”

@johnjaco5544 5 ай бұрын

Amen!

@d1sternagle 5 ай бұрын

Unless you want beautiful babies. ‘Protection’ is a population control method used by the controllers.😜

@petemedina8446 5 ай бұрын

35:03 😅

@joedavidzuniga1993 5 ай бұрын

😂

@jerrys2346 5 ай бұрын

"You gotta know a guy to get a sticker for one of these babies!" There's a quote in every video.

@jimrodgers3684 5 ай бұрын

"Oh, look. There's a new sticker."

@fredfranklin8816 4 ай бұрын

Great line!!

@BigDaddy_MRI 5 ай бұрын

I’ve worked on MRI systems for 39 years. Analog to Digital circuits are genuinely complex. The A/D converter doesn’t care that much about current. (Caveat: it does, but only to develop a voltage). Nano-amps of current when run through an RF filter and fed to an A/D converter will happily work just fine, and provide a digital representation of the voltage it senses. The same goes for a modern day DC digital voltmeter. So just the salt deposit on both insulators acted as a very high input impedance short, and some tiny value of current flow was established. Maybe in the nano-amp range. The ECM A/D converter happily did the conversion and sent it to the digital computer side of the ECM and BOOM, the O2 sensor had an offset. In other words, you nailed it, Mr. O! Perfect description and understanding of parasitic current flow on the outside of an insulator. Nicely done, and outstanding troubleshooting. And if you prick a wire, always seal it up with liquid electrical tape! Thanks, Mr. O!!

@davidhutchinson6910 10 күн бұрын

What you just said is true, however, Mr. O thoroughly comprehends all of this interaction between electrical; digital and "the real physical world" . (water; salt; dirt & etc.). These things are not taken into consideration by the "engineers" when they design their equipment. And the interesting fact that Mr. O isn't aware of just how "gifted he truly is" !!!🤔

@allanpepper9651 5 ай бұрын

Great analysis as usual. That would have been the greatest challenge for any mechanic/technician/ problem solver and you zeroed right on it. That’s why your the best on KZfaq. I doubt any of the others would have picked that up, especially the ones in warmer states.

@briangreen430 5 ай бұрын

I live in North Carolina and I am glad to have Eric's videos because many Yankees are relocating here with their rusted out Subaru's.

@hansjansen7047 5 ай бұрын

It wouldn't happen in warmer states, they don't salt their roads.

@nytrortx5224 5 ай бұрын

@@briangreen430no self respectin’ northerner drives a Subaru 😅

@learninghowtodothis8062 5 ай бұрын

Super smart diagnosing. This is why you get the big bucks.😊

@ghall05 5 ай бұрын

You just saved the earth and unbelievable amount of oxygen sensors and ECMs! A single dealership would have shot their parts cannon at this truck so many times it would have caused a national backorder. Seriously good diagnosis Eric!

@jakalaraa 5 ай бұрын

Another brilliant diagnosis from the South Main Sherlock Ohms

@francisgall6172 5 ай бұрын

You Mr O are the Sherlock Holmes of diagnostics! Simply amazing. Great job!

@mrfishbulb7187 5 ай бұрын

Sherlock Ohms

@francisgall6172 5 ай бұрын

@@mrfishbulb7187 😆 lol good catch

@VashthStampeede 5 ай бұрын

I hope he doesn't replace, "There's your problem lady! " with "Elementary my dear Mrs. O."

@gwbuilder5779 5 ай бұрын

Understanding the sensitivity of the miliamp/volt circuitry can really help zero in on diagnostics. Knowing your influencial environment like salt corrosion whether from winter road maintenance or ocean is huge in terms of where to look for potential trouble spots. Here in Hawaii, electrical connections full of corrosion go unnoticed because there isn't a bunch of green puss around the connection, but that light oily salt film is actually everywhere. I would imagine even there in New York or any seaboard location. I live at 4,600ft elevation, but here in the middle of the Pacific ocean, there is nowhere that you don't have salt air. Excellent catch Eric, perhaps you have worked in a salty environment before.😂 It amazes me how such a slight oily film can affect the sensitivity of electronics.🤙

@gcrauwels941 5 ай бұрын

Got to love that salt's conductivity. I once had a customer with a 54' Bertram powered by12V92TA Detroits call me one morning that said one of his engines just started up by itself at the marina in the middle of the night. Went and checked it out, and a pinhole had developed in the a/c condenser water manifold (uses raw water for cooling) that was outboard the port engine. A fine stream of salt water had misted the starter solenoid and lit the engine off. Had to rebuild the starter. Definitely strange, but not hard to find why.

@kenj.8897 5 ай бұрын

Good story

@russdavis1960 5 ай бұрын

THAT was one of those 'who'd a thunk it' type of deals. Great job on the diag!!!

@Zenergy0101 5 ай бұрын

Happy Tuesday to you and yours! A 2001 Chevy pickup is a rarity these days in your part of the country, isn't it? You're probably the best diagnostic guy I've ever seen. Keep fighting the good fight Eric O.!

@Ogdin3 5 ай бұрын

Looks like the only thing keeping it on the road is the shady safety inspection .

@tylermacconnell217 5 ай бұрын

It didn’t look all that bad. Frame seemed fully intact and rocker panels were in place. Just the usual crust…

@kenj.8897 5 ай бұрын

@@tylermacconnell217POS lol

@SuperSecretSquirell 5 ай бұрын

@@tylermacconnell217 those rockers are covered by Bushwacker covers. I'll bet they're dust/nothing behind them.

@lvsqcsl 5 ай бұрын

@@SuperSecretSquirellYou caught that as well.

@kens.3729 5 ай бұрын

A Great Master Mechanic is Always Great to Find. Your Viewers are Spoiled. You’re the LockPickingLawyer of Auto Mechanics. Great job, Eric O. 👍🙏

@bigragu6828 5 ай бұрын

you saw a strange reading on the scan tool and didnt ignore it. you took the time to double check what you thought was supposed to be the correct reading and redirected your route before calling a bad sensor. that never give up approach to your diagnosis process is what makes you a great technician. cant wait for part 2. maybe bonus footage of fixing the manifold leak. I wirs you and your family a Happy and Safe Holiday.

@MrHunt1701 5 ай бұрын

"for some reason I doubted mysefl" And this is why your argueably one of the greatest mechanics that ever lived ❤❤

@REDMAN298 5 ай бұрын

Good find. That`s another reason to shy away from cars that have had too many hands stirring the pot. You can`t tell those guys that they`re doing bad by stabbing wires at random. They won`t listen.

@bartscave 5 ай бұрын

Man, when I watch videos of the corrosion underneath these trucks, I know I’m SOOO spoiled in California…. But even so, I probably still wouldn’t have figured this one out! Awesome diagnostic skills Eric!!

@seabulls69 5 ай бұрын

Amazing troubleshooting, Mr. O. Gotta admit, this well seasoned electronics technician is impressed with your skill and determination. I've seen high voltage (several thousand volts) find some odd pathways across non-conductors but never anything with voltages this low. With HV, there's always the possibility of carbon tracks created as a result of arcing across contaminated insulators creating a high resistance pathway from point a to point b. How (presumably) vinyl insulation can become conductive like this is new to me. Bravo!

@fernando13e 5 ай бұрын

This reminds me of some things my dad always taught me about electricity, I guess whats happening is some galvanic cell formation due to the salt and corrosion which its reaction is accelerated by you when touching both wires at the same time maybe like how a battery works.

@alyjaabirbachoo5354 5 ай бұрын

Thank you so much for sharing this experience diagnosis I would never believe that if I didn't see it 😅😅 you make it seems like it was so easy to diagnose and yet so many of us would be scratching our head with this issues 😅

@jamiepatterson1214 5 ай бұрын

Eric, your ability to explain a problem and diagnose it, and why it occurred, explains why others brings their vehicles to you to troubleshoot. You demonstrate a working knowledge about how circuits work, thereby knowing the possible cause and what to look for. You'd be an excellent teacher at a tech school or jr. College.

@dustcommander100 5 ай бұрын

I think you nailed it. The salt itself is conducting, and is more than happy to reach the conductors thru any pinhole or other means available. Super bad environment up there in PRNY. If a good O2 sensor has a comparatively low impedance to the input of the ECM, having it unplugged (or a bad connection to it) would leave only the path thru the contaminants to determine the voltage - whereas when the O2 sensor is in the circuit, it would mainly be the determining factor. But what do I know? I'm a plumbah, for cryin' out loud!

@steveloucks3950 2 ай бұрын

I sure hope your local folks realize how lucky they are to have such an honest and smart tech. You amaze me

@ryanallen5334 5 ай бұрын

That was interesting as hell. You are one smart tech I would have never figured that out. Nicely done

@mikechiodetti4482 5 ай бұрын

The salt in water finds its way up both the outside insulator and inside on the conductor and the insulator. Once it dries, you got power from the heater side through the corrosion and into the sensor circuit. WOW! Try explaining that to the customer! Good one Mr. O.

@SouthMainAuto 5 ай бұрын

You don't haha you just tell them the total lol

@gwbuilder5779 5 ай бұрын

@@SouthMainAuto😂

@matthewhamrick1099 5 ай бұрын

Wait til the customer gets a bill for more than the value of the vehicle. I have a 2009 Chevy Aveo with a r-title thanks to a deer. Just put about 1k into shocks struts a bearing 2 lower control arms 2 rear bushings 2 interior door handles rear brake shoes and an alignment

@jwboilermaker 5 ай бұрын

Always good to see Mr. O on a Tuesday

@kenj.8897 5 ай бұрын

He shot this on a Monday , I held the camera

@DIYDaveOK 5 ай бұрын

Fantastic as always, Eric. Merry Christmas!

@victorbellan8357 5 ай бұрын

Very nice to follow your journey! Enjoyed getting to the bottom of the issue !

@kirbyschneider4187 5 ай бұрын

Thank you for the recap at the end. Great job as always!

@mlstrawxj 5 ай бұрын

Very interesting diagnosis. I would never have thought to check that.

@russmassery1880 5 ай бұрын

I've always appreciated that you take the time to explain the issue. And your findings.

@jimbrideau5802 5 ай бұрын

I love your diagnostic videos. Been watching for years, well done as usual.

@duo20785 5 ай бұрын

These videos always keep me on the edge of my seat. Frigggin love it! Keep up the good work!!!

@shanestrains2849 5 ай бұрын

Man this was an interesting one, thanks for sharing with us. Waiting to see the repair!!

@RussianSokol 5 ай бұрын

Thank you for your videos. Been learning from you for over 3 years, cant wait to learn more.

@454lando 5 ай бұрын

Great video! Thank you for taking the time to record this

@advancedleveldiagnostics 5 ай бұрын

Wow, crazy find! Excellent diag, Thanks for sharing!

@RJJ6129 5 ай бұрын

Thanks Eric, learn something new every time I watch your channel.

@michaeld9731 5 ай бұрын

This was a super-interesting diagnosis! Thanks for taking us along and 'splaining it all so clearly. Merry Christmas to you and your family!

@danielesilvaggi 5 ай бұрын

Thanks for all the videos Eric. Merry Christmas and Happy New Year to you and Mrs. O and all the kids.

@montestu5502 5 ай бұрын

Wow, I would not have expected that. Crazy. Great job at troubleshooting!

@ganeshnarayan5505 5 ай бұрын

Another Great video Mr O Thanks for sharing.

@springfield4522 5 ай бұрын

Another fine job of diagnosing and leading us through the method. If you dont post another video soon, you and the family have a great Christmas!

@steveb6103 5 ай бұрын

You have no idea how mad I get finding holes punched in the wiring harness! I've had to replace the complete harness on a 2 year old Mack rolloff truck because of one person was punching the wires every couple of feet.

@KrazyKuul111 5 ай бұрын

Amazing work, thank you for sharing with us

@edchenal821 5 ай бұрын

Your patience is golden. Good Job.

@charleskile3769 5 ай бұрын

Well this answered a lot of questions I have run into many times..... Thanks for sharing Mr O.

@johnnym.rodriguezr3562 5 ай бұрын

You’re sharp as usual, really great troubleshooting skills!

@stationaryenginesworldwide 5 ай бұрын

Great one Eric..and your troubleshooting skills are killer!!..happy holidays to you and yours .I am so looking forward to 2024 with SMA.

@samrobinson9802 5 ай бұрын

Eric, Another great job & diagnosis!

@irishbob6771 5 ай бұрын

you are really good at explaining electrical stuff. thanks so much. always enjoy your videos.

@michaelgiannone2192 5 ай бұрын

Always a banger mr o. Merry Christmas to you and the family.

@spodyr6 5 ай бұрын

very informative. Appreciate your old school diagnosis methods and troubleshooting. It is a lost art now a days. Cheers !

@alrifainidal 5 ай бұрын

brilliant diagnosis from the South Main

@CraigArndt 5 ай бұрын

This was such a great video Eric, super helpful.

@bradsmn 5 ай бұрын

What a great find. You are a master mechanic. You never bust out the parts cannon!

@spirokattan3655 5 ай бұрын

Great observation of the bias voltages on both O2 sensor circuits. Thank you for taking the time to explain circuit operation and diagnostic process!

@steveo4749 5 ай бұрын

Bravo. You are a master mechanic, Eric.

@ChrisWilliams-pu8pj 5 ай бұрын

Great one! I have not seen this before. Thank you!

@IntuCars 5 ай бұрын

Cool example. You really are a gifted teacher.

@milham6341 5 ай бұрын

You sir are a true master of your craft. Can't tell you how much valuable knowledge you've passed on to all of us

@NOELTM 5 ай бұрын

Happy Holidays to you Eric and family.

@bkon4675 5 ай бұрын

Another fine diagnosis! I always learn stuff when I'm fixing things.And i fix everything. Now, I'm picking up information on my downtime as well. Great show!

@jeffjankiewicz5100 5 ай бұрын

Another amazing diag Eric. The way you find pus packs and broken wires is truly amazing. From my Family to Yours, Merry Christmas.🙏❤🌲

@goodcitizen64 5 ай бұрын

Eric you are an excellent diagnostic technician! Merry Christmas brother!

@skiptaggart8116 5 ай бұрын

Great diagnostic skills! Great videography! Great explanations! Wish there was a skilled technician like yourself near me!

@aerotech1bob 5 ай бұрын

Great information. It's a pleasure to see a master at his job

@fmerkl 5 ай бұрын

you the Man !! I worked on the bench '72-'91 , love your line if thinking things through ! went farming !

@vincentlallo6543 5 ай бұрын

i really liked this video. my brother-in-laws father was an auto electrician before graphing meters and all the heavy duty diagnostic tools. i remember he had the ability to feel the wire and find where it was broken internally. when you moved your finger over that wire and the voltage went wacky it brought back memories. i am 71 years old and i have not seen this skill many times in my life. i learned a hell of a lot from this video . thanks!

@tim6991 3 ай бұрын

Love your material Mr. O. I like your approach and you’re a great teacher. Thank you Sir.

@BillRobinbird 5 ай бұрын

As usual excellent diagnostics.

@scottnusser6232 5 ай бұрын

Slick find! Merry Christmas!❤ Thanks for all the great tech through the year! It's always a challenge to get mentally up to work on a total turd, but you do and that's to your credit. It's a challenge but we have to remember as shop owners this is what the customer has and maybe all he can afford. Good job and good man, Eric! God bless❤

@jonminer9891 5 ай бұрын

Hi, Mr. O. I love your detective work. Thanks for sharing! Stay Healthy!

@ScarletKnightmare 5 ай бұрын

Mr O, you are a gem of a person and you just saved me a whole lot of trouble fixing this exact problem on my Chebby plow truck. I'll learn proper diagnostics by spring, but this got me up n running for snow season. God bless you and merry Christmas to the family!

@wayneharris7534 5 ай бұрын

Hi fella I have found your videos very helpful over the years .. and would like to wish you and your family a very merry Christmas 🎄🎄 a happy new year 👍🍺🍺🍺 Watching your videos have saved me thousands of pounds in repair bills so it's a massive thumbs up from me 👍👍👍

@porkchop4604 5 ай бұрын

Eric your troubleshooting skills are amazing on those CHEEEVERLAYS!

@user-nk3tt6zt2l 5 ай бұрын

Merry Christmas to you and yours.

@crasher88 5 ай бұрын

great find Eric that is beyond bizarre!

@tonywestvirginia 5 ай бұрын

Very helpful videos that you show!

@HOTROD43137 5 ай бұрын

hope you and your family have a Merry Christmas and a Happy New Year

@uhplumber5962 5 ай бұрын

Great diagnostics on your part. I have a 2004 suburban with a similar problem on bank 1 sensor 1. You have given me some insight on what to look for and it didn't cost me anything except a like. Thanks!

@donakahorse 5 ай бұрын

Shout out to those original O2 sensors. Putting in the work. Thanks for pointing this out. Excellent diagnostics as usual

@Speeddemon3 5 ай бұрын

This is a true diagnostician at work! Mr O. Is the man when it comes to true diagnostics. Really a talent to admire. Wish you all and your all the best thru the Christmas season and all the best in the New Year! Thank you for sharing your talent and stay safe. Just a northern tech that admires your honesty and talent! Wish you and Mrs O. the very best!

@bassiclymike 5 ай бұрын

excellent diagnosis as usual

@chrisstone3939 5 ай бұрын

Great bit of electrical diagnosis. I learnt a lot about the high impedance nature of the Oxygen sensor signal wire! Eric your understanding of electrical circuits is truly impressive!

@johnds6621 5 ай бұрын

Eye opening. Your the best Eric. I learn so much from your video keep up the good work.

@rssvss 5 ай бұрын

Awsome job and explanation! Thank you.

@jptrainor 5 ай бұрын

Dry finger to finger resistance is 1000 to tens of thousands of ohms. I looked that up out of curiosity when I saw the finger touch test result. So if I understood, the circuit is: heater power wire (voltage source) to pin hole to road grime to dry fingers to road grime on the sensor wire to pinhole on the sensor wire to the computer's sensor input. When the O2 sensor is plugged in you wind up with some sort of voltage divider that is splitting the heater voltage and the O2 sensor voltage, and that messed up result is then read by computer. And to exacerbate that, the pin hole branch of the circuit drops in resistance when it's wet. Spraying water on it might have showed a change on the O2 voltage reported on scanner. Very interesting indeed.

@peterhodgkins6985 5 ай бұрын

Therein lies a classic demonstration of the differences between knowing what components individually do, and how systems work. The devil truly is in the details... Great find Mr. O! Looking forward to Part II!