Chevy / GMC Truck - Running Lean P0171 & P0174
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- čas přidán 5. 02. 2019
- In this video I have a look at a 2008 Chevrolet Silverado 1500 5.3 that came in with codes P0171 and P0174 indicating that the engine is running lean. It doesn't take to long to find the problem and come up with a temporary fix.
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Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained - Auta a dopravní prostředky
*Redline Detection 95-0003B Smoke Pro Total Tech Leak Detector: amzn.to/2t4G18k
*Redline Detection 95-0082 Easy Intake Diagnostic Leak Detector: amzn.to/2WJBXrS
*Bosch Diagnostic Scan Tool ADS625: amzn.to/2t5gKLc
Hello Mr. O would you recommend the Autel mx808 for amateur use?
Got Dan That much for a Smoker! I need to get one
zip ties and a soldering iron
@@ztaples MX808 is definitely fine for beginners, but its just a fancy scanner. NO Bi directional actuation tests..etc.
That Bosch scanner any good?
I love that we live in a world where this info is free and you can make a good living giving it to us, I learn so much
21:38 -- "It's only "temporary" unless it works."
That law applies to every "temporary" repair that's ever been made.
fix is a fix ;)
A semi permanent repair! 😀
Why do i think about duct tape? 😁
@@Gardsfix duct tape is a cure for every leak ;)
Just remember when duct tape fails.........there is rescue tape. Seriously, google if you haven't seen it. Always keep a few rolls stashed in the trucks and shop.
This is scary. When you saw the disconnected outflow tube and pointed out the aftermarket intake, I thought...half joking to myself...."drill a hole in that puppy and put the hose there...." And that's what you did!! I'm a computer nerd learning auto repair. Awesome. Thanks so much for these videos, Eric!
I've listened to a lot of Techs on this sight, but none as smart as this guy. He not only talks a good show .... but he backs it up with substance. Thanks Mr. Obrochta for sharing this video .
I couldn't agree more! I love these videos!
He's worth a million
"It's only temporary, unless it works." I'm stealing that!
In the Star Trek universe you'd be Montgomery O.
Kirk pushes the button on his chair..."Mr. O, how long before we have warp engines back on line ?"
"I'm sorry captain, it says 24 hour cure on the box." :o)
"Smoking like a freight train".. Been many years ago I heard that one. Best channel to hear all the old sayings.
I have a 2004 Suburban here with a Spectre cold air intake with pending lean codes .Customer dropped it off with 204,000 miles and has only owned it for one week . Your video was great and I appreciate all your hard work in helping other auto repair mechanics become better at what they do.Thumbs up
Mr Eric O., I'm in my 60s and wish I had someone like you near me to repair my vehicles. I enjoy your channel very much thanks for sharing all your knowledge. you're a class act.
I always learn from your videos, you are one hell of a diagnostician.
two quick tip tuesday..... #1 MAF numbers close to to size of engine .....#2 dont erase codes after fix with fuel trim in mind .... great tips
I found this interesting.... good direction from the door. You handled it flawlessly, minus the hiccup with the adhesive. Never cease to amaze me Eric!
I accidentally pinched the #6 fuel injector line on a spider fuel injector assembly when I replaced the assembly and saw positive fuel trims from a 2001 Silverado at over a positive 42 which at the time I thought they would only max out at 25. Of course I had the number 6 associated misfire code as well. I literally had to use ties to ties back the rear injector lines because they were slightly longer than the stock assembly. Lesson learned. The maxed out lean code was due to a lack of fuel to a single cylinder on bank 2. I am learning alot from Eric and I appreciate his commitment to the Auto Repair Community.
I have a po 300 code and don't know where to start I replaced all the injectors plugs and wires runs rough at ilde I even checked for vacuum leaks
01 Chevy Silverado Lt 1500 5.3
You are funny Eric! I love the the line “The MONEY LIGHT is on.” Not too many would appreciate it, I think it’s absolutely hilarious!
You are not wrong. You’re videos are informative but as I hope everyone realizes that every situation is different by design. Geography, driving conditions, drivers mood at the time driving the vehicle at all times, and the the DIYers ability to use your tools.
It’s obvious that your knowledge comes from years of experience, however the tools is something you’ve built up over all those years. Technology has changed the combustion motor as I knew it growing up born in 1966. Most of the videos I have seen from SMA utilizes all of these great tools you have to diagnose, which almost always winds up not being something I can diagnose myself. I’d like to have your tools but that is not happening in my lifetime. I am forced to to take it to someone with the tools you may or may not use, but one thing is for sure. I go in with knowledge that I didn’t have before watching you do what you do so very well. Whether or not it helps me when dealing with a professional wrench turner or in fact makes it worse because I’m suggesting things to him that he really doesn’t want to hear. I don’t know for sure, but I do know that I’m not paying for parts and labor on stuff that I know the vehicle did not need. The mechanic who just throws parts at a vehicle to see if it fixes the problem should have his ability to do repairs on vehicles for money revoked permanently. Geography plays a role for the obvious reasons. With you in New York and me in Southern California, the stuff you spend time on like removing almost all under carriage components that are rust engulfed, takes me no time at all because that’s not an issue here in my region.
Driver mood is important because you either have a car that was driven all its life by a little old lady who went to doctors appoints and bingo less than 7miles from her home and never going over 40mph, or a younger to middle age person who has to be in lead foot mode all the time who has driven all over hell and back. If I’m buying a used car I prefer the former rather than the latter.
I’m enjoying your videos and it is informative whether I do the repairs or not.
Thanks, it’s much appreciated!
I used to have quite a collection of "Cold air intakes" i removed to fix customer's problems. Thanks Eric!
My favorite local automotive machine shop has a huge sign saying "Stock is Not a Dirty Word". I agree completely. My ten year old truck is still completely stock and runs as designed...... I intentionally avoid aftermarket stuff. As far as the PCV tube is concerned, I would have tried to source a rubber grommet that fit the elbow and drilled the intake to match the OD. OEM uses this arrangement frequently. Thanks for another great video!
You appear to be the mechanic that mechanics go to
I sure wish you lived closer to me cuz you sure in the hell would be my mechanic 😂
Mine too
If I lived near him, he would have about 15 more videos about Silverado repairs 😂😂😂😂
Classic! "It's only temporary unless it works." Sooooo true!
"it's only temporary unless it works"......i love that!!
This goes to show how integrated seemingly simple things are on newer vehicles. A Vacuum leak at an improperly installed quick disconnect fitting, and an air source to the engine PCV System not feeding from the MAF, for "unaccountable air". Brilliant diagnosis. By the looks of the dirt on that 3/8" hose, it has been that way for a while. I was a bit surprised to see how quickly and predictably it corrected and re-learned the new values..... REALLY good lesson in Fuel Trims. The ONLY suggestion, I would have drilled out the hole a little larger with a step bit and installed a plastic or rubber gromet, then a little rubber grease and push in the elbow. That way it will self align and not be prone to cracking. That can still be done if there is a problem in the future. GOOD FIX. I too shudder at the suggestion of "Cold Air Intake" and other aftermarket junk that people spend good money on... only to create problems. The OEM's spend a lot of time and money to design things like induction systems that are functional, quiet, dependable, and as efficient as they can be for the overall vehicle. The "Gains" to be made from aftermarket systems are quite often narrowly focused and marginal at best, without all the engineering of the OEM's. Those trucks already have a Cold Air Intake from the Fender installed from the factory even though it may not look like it, and the weird looking Induction Tube is also an induction silencer. Some people just have to have that "Throaty Sucking Sound" at WOT!
Good morning, Mr. O. Very well explained. Thanks for sharing. The only gain from that "cold air intake" was a bill from SMA! 😂
you same El Cheapo from MotorStorm
@@punktalley No, never heard of it.
You are a true professional! I’m glad people like you make videos that actually helps people ! Thank you for your lecture
As always, great approach. The folks in that area are lucky to have your skills to call on. Thanks for the video.
“Aftermarket Garbage” Agree 1,000%! 👍🏽
"Aftermarket Junk", LoL!!! You said it best. GM knows that folks need to customize their pickups, so they created a factory "cold air" intake that could be ordered from the dealer from their High Performance division. It works great and helped me squeeze an extra 3hp out of that same 5.3L Vortec. Great video.
you have officially attained master of your trade status.....
Thankyou so much for the explanation at the end which summarizes the "why" factor. Learning how these systems work and the thinking process to come to your determination is highly valued by myself.
Cheers
Doug
Gotta love the hot air intakes. Genius marketing, they just call it cold air instead, then watch em line up
I am no mechanic, but enjoy learning and doing my own repairs on my '08. I have almost the identical problem with mine. And a huge thanks to your explanation of what all was happening with the lean fuel trim code, I know mine is a vacuum leak as well. Thanks so much!!
Pays to know how the pvc system works. Quite obviously the guy that cut the hose to the fresh air intake and MAF didn’t know what he was doing. I’m sure this guy watched your video to see how you fixed the problem. Good diagnosis. Nice repair Eric
Another option to avoid the gooey mess and aesthetics would be to drill appropriate hole (probably 3/4" or so) and install rubber grommet to receive spigot, pretty much how most pvc's sit on valve covers. Yours is still an innovative solution, nice work.
That's what i did with mine. A PCV valve grommit and an elbow
You sir, are a pro. I wish I had a tech like you in my area. We're stuck with part changers over here.
Modern two part epoxies, millions of uses. Flawless diagnosis... Great job Eric!!
That's gotta make you feel good, diagnosing an issue that another shop couldn't figure out. Thanks for taking us along!
I have been a.backyard mechanic for years. I have been trying my best to learn about the newer vehicles. I can say your are a very good teacher and mechanic. Thank so much for these videos. I have learned so much.
Sometimes the Snap-on guy needs the Astro guy to fix their truck .
Been there, done that, mostly backyard repairs. LOL 😂
And basic Harbor Freight/Craftsman/ATD tool sets.
And a Launch scanner. 👌
I was wondering which leak was the fix until you said air "not accounted for". Now I understand that both areas serviced attributed to the fix. Thanks Eric, very thorough!
Omg... if I had a dollar for every LS that has had that line off (even on the factory airduct), I'd have a few hundred dollars! So glad I dont have to do this kind of stuff anymore! I'll just watch you to keep fresh on the aftermarket fixings! Awesome job as usual!
Great job eric , nice when the dealership brings the easy ones to you . Makes me nervous this shop could not handle it ! The power of visual observation. The brain is a great tool to employee when others can not figure it out ! Proves the rule of life : "You can never just do one thing".
Excellent repair! It amazes me that so much work comes from other shops.
I use grommets when doing conversions like this. Your work is spot on thank you for your time.
Seal the crank case. These PCMs don't miss a trick. V dubs are really high on this. I love fuel trims for this. Aftermarket K&N kits. They work when installed correctly. The concept of "false air". Good stuff, Eric.
In tech school right now, and I just wanted to say thank you for this video! It has helped me!
Awesome job again Eric!!!! Best repair videos on CZcams!!!!
I always appreciate how you always track down the source of the problem, and not just correct the symptom. Unlike a doctor who gives you a prescription for pain instead of locating the reason for the pain. Looks like the problem was the vac hose leak at the rear of the engine. Couple tips- a step drill works excellent for plastic and soft metals. And Hardman makes an epoxy/adhesive kit that has single use epoxy packets for many different kinds of materials. Indispensable in your field. Thanks for the video.
When you have 25000 people whach ingredients you in less then a day I tell you Eric you are the superstar of mechanics.great job I am glad you take time to record for us.
So nice to see you fix a problem, and show the proof of the fix. Smoke machine was a great testing tool on this one! Pretty cool! Thanks again Eric.
My favorite video so far. Excellent explanation of fuel trims
I remember when I was young and thought the possible 1/2 horsepower gain and all that extra noise was worth it.
You and old Smokey got it figured out,good job as usual brother Eric,your the man bro.Hope all is well with the wife and kids,God bless buddy.
Just wanna say, this is the best auto repair channel out there by far ! learned so much in the short time i've subbed ! This video teaches us that there are plenty of crap mechanics out there and some amazing ones !
I second that! Scanner Danner rocks too, but he doesn't put his best stuff on YT anymore.
Plenty of crap ones! Learning is ok and we all have to start out, but there's a difference between learning and crap. Crap mechanics would have just thrown a new air filter, fuel filter, plugs and wires on it, reset the codes and charged the customer. A real tech looks at the whole system. So many people get fed up thinking their older vehicle is un-fixable because they can't get real repairs done.
@@fascistpedant758 Yeah I'm no mechanic, but i would like to think that any mechanic and the fact that the owner being a 'mechanic' would at least look at the fuel trims, and know that hey i probably have a vacuum leak, and from there find out where the leak was coming from. It really didn't seem that Eric'O had to do anything more than what I would think would be normal procedure, as in, smoke test and sniff around the obvious places to look. Eric'O is on the ball ! I'd like to find a mechanic like him down here where i live in FL. I'm very happy cos i've been recently fixing my moms minivan and she has a long term fuel trim of positive 9%, but when i rev the engine a little it goes down... Bit like what was going on here, but to a lesser extent. So really grateful for these videos to see how an experienced mechanic thinks at times like this. Eric does a great job of sharing his thought pattern, and that really helps us who are trying to absorb and learn. Took yrs to learn his trade, and there he is sharing it for all of us learners. Decent fella !
SWEEET 👍 👍, high temp red silicone... Stuff sticks to anything. And its nice and bright. Lets people know you've been,there 👍
Love the live diagnosis; you said you should have looked at FTP sensor but you didn’t. I feels like I learned with ya! Thinking out loud as you work really helps me out.
Would have loved to see ya chuck that puddle sucker into a snow bank lol
So appreciate your post fix explanation of manifold vacuum versus fuel delivery. Great trouble shoot tip. Keep doing what you do.
Fair play, I always questioned why you always go straight for the computer first. Quite a few times you've proved it's worth. Hats off to you.
Eric, if you want to rule out the intake skewing the MAF, a vacuum leak between the MAF and the Throttle body or even the MAF itself, just unplug the MAF to put it in speed density mode. Also, if you want to recommend a quality aftermarket intake to your customers that wont throw off the MAF cal, S&B and Air raid will do the trick.
You wanted JB Weld Kwik- that's the 5 minute epoxy. I use it a lot, like it.
I just wanted to let you know that I've been learning a lot with your videos
Thanks
Great video brother. I love drivability videos where you talk about expected data parameters and how they steer the diagnosis process.
I can see the value of having a smoke machine. In the world of DIY I guess we could have used the Paul Danner method of squirting water over everything. But that tube was a dead giveaway. Since watching your videos I have removed aftermarket items on my truck. One less "variable". Great video as usual Eric.
Like your channel intro!
We use to use WD40 to find vacuum leaks. But I’m old school
Throttle body cleaner works great aswell :)
I made my own smoke machine. I used a .30 caliber ammo can and drilled 2 holes in the side. I hooked a 12 volt tire inflator up to one hole and a hose to the other hole so when you turn on the inflator it will blow through the ammo can and out the plain hose. To make smoke I put a peice of hot charcoal in the bottom of the can and sprinkle a little shredded paper on the hot charcoal. It really does a good job for under $20 total.
You can use a hand bike pump too for more air, or you can just blow in one hose and smoke will come out the other if you want to do it real cheap lol.
So, finding vacuum leaks is all smoke & mirrors? lol
Nah, it's smoke and mirror, singular. ;-)
Yep. This is one time that smoke escaping can be a good thing. Now if it were electronics......
Electronics are heavily dependent upon a small quantity of magic smoke trapped inside by the manufacturer. Let the magic smoke out and that device will never work again.
Yeah, ya gotta "blow smoke..."😉
good answer you sir are on your tows
Thank you for the teaching component! I have been watching trims but never thought about Erving to identify vacuum as the issue. I love your videos!
Great fix, Mr. O! Epoxy compatibility to substrate is an art in itself.....
Another great video. Shows how important fuel trim data is to know. Shame that guys get their hands in these vehicles and throw aftermarket parts in there without knowing the basic operation of the system. I get this stuff a lot.
I installed a K&N cold air intake on 07 5.3 silverado a long time ago, fortunately it came with the pipe for the breather. Never had a lean code on that truck when I had it.
Another excellent vid. You use what you have. Mr. O , you are resourceful. I'm always impressed by your scan tool understanding. Years of practice.
Thanks for videos like this got stuck on a 2009 Silverado and your video got me out of a jam found a vacuum leak on their after market air breather. Keep up the great videos.
I would use a brass street fitting when I'm tapping into a plastic pipe like that. The tapered threads make their own threads and a good strong seal in the plastic. For makeshift plastic welding hold a large punch, or cold chisel with vice grips and heat it with a torch. Garbage can lids are a good source for donor plastic. Use the punch like a soldering iron and butter on the plastic.
Love wacthing him work. Admire you Eric!
It's nice to see even the pros have to over come and adapt just like us diy type guys do!!!!
5 seconds into freeze frame data - "MAF is underreporting." We haven't had a good lean code video in a while. Thanks Dr. O!
It is great you are teaching and old 61year old dog new tricks thank you.
Great video Eric O.
I've always thought those aftermarket air intakes cause so many problems, the OEM ones are the best.
I don't have a smoke machine, I remember my dad teaching me how to find vacuum leaks by using a long piece of hose on my ear and run the other end of the hose all around under the hood (bonnet here is Australia) until you hear the hiss.
I like how you say not to clear codes right away! Excellent job on that Chevy. Vacuum leak galore. I don't blame you on a fastener type coming loose then getting sucked into the intake! You are making me not want aftermarket crap on my Ram 1500. Not that I was looking, except air bags in the back for towing. Great Video and showing us the trim and what not.
One fitting to think about when punching holes through plastic is the externally threaded metal Schrader valves normally use on wheel rims with tubeless tires. Although they are small, they will go through thin plastic and provide a sealed branch for vacuum lines. You can also manifold two together and use rubber vacuum line and tees to increase the overall flow when called for.
Go to the Pick-n-Pull, get the OEM intake. Lay that Greene pipe on the front seat.
I've done that to customers on "warranty" repairs well except they were new Ford parts and a nice bill
Thank you for being nice o that poor kid....
@@jeremyhanna3852 take that off, I take the car elsewhere, didn't order that.... and you can explain to your boss why you have ordered an intake that the customer probably had somewhere at home, and of course pay for it yourself, if it doesn't go
the customer can do that themselves, without even picking and pulling, cause they have it somewhere. He wanted to fix the problem with the setup, not you dictating him your preferences. That's just jerk attitude. Did you watch the video? That's how work is done.
@@dushk0 I'd only pay the diagnostic fee, and nothing else.
If I were the mechanic, I'd make it work as the customer set it up, aftermarket and all.
"I just installed an aftermarket intake and now my check engine light is on. I can't figure out the problem!!" Must be one hell of a mechanic.
No wonder Chrysler vehicles break down.
Cut tubes and not connect them. Leave the connection at the back of the intake loose. Yup..a super mechanic.
That's some good info on the fuel trims. You just schooled the owner (tech) as well as thousands of viewers. Good Work Eric!
I use a soda can upside down to mix JB Weld... it's dished and makes it easy to mix.
Good tip, thanks!
But won't the soda pour out?
@@JD-iu3vi Not if you're pro
slick trick! thanks!
I mix mine in the bottom of a beer can while simultaneously shotgunning the beer.
I thought about a “Cold Air Kit “ for my 94 Caprice 5.7 because everyone said I need one then I actually looked at the air box on one of my buddies and realized it was open to the hot under hood air then I looked at my stock intake which pulls air from the nice cool inner fender, hmmmmm think I’ll save myself a few bucks and leave it alone. I did take the home plate off though and polished the intake plenum
The shiny intake probably increases power more than the cold air intake would have.
Cold air intakes usually just make a bunch of extra noise, so the consumer thinks they are making more power. LoL! You made a wise decision!
It pulls cold air from the duct behind the bumper
Wow you honed in on the problem from the beginning & I'm fine with that fix! Kudos Eric!
Thank you Eric. Good job. I appreciate your videos. Have a blessed and safe week. Stay warm brother.
There's your problem LADY 😜
All the jiggly bits fell out.
Excellent. I was thinking a rubber grommet for the fitting.
i never would own any of these cars you fix.. but still im watching all your videos :D Keep it up !
Another great diagnostic process and fix! Thank you Eric!
20:20 - LOL "One...hour...later..." Love the Spongebob reference
you are a freakin genius....such a renaissance man....top job.....respect.
Thanks!! Perfect lesson in fuel trim, I have wrote down every tip you said about fuel trim :)
The guy has a big "Snap-On" sticker in the back window. So apparently he likes the image of being able to fix vehicles more than in practice:
"Look at me, I'm so high dollar that I like overpriced tools, yet I can't see this vacuum hose dangling in the breeze."
Dnt hate
It's a high priced Technician. You pay for his Strap-on tools. Only to send it to Mr. O😅
Eric O: "I hate aftermarket garbage!" Buys Jeep and converts to fully aftermarket everything. It only sucks when you don't know its history.
Your videos are top notch my friend as your mechanic skills are as well.
this diagnosis the reason i watch your channel ,nice detective work
One thing I do to limit drill travel is slide a piece of hose over the drill to act as a stop.
Tape.
good idea ,I will use that one! I should have thought of that one 50 yrs ago Jim That is a great idea! thank you
In hind sight, a tire valve stem with the core removed should of worked without the sealant.
I thought the same thing
SżeaxxdxsGtsdersdetsdeMr. Cook assassin
Hi Eric, suggest you purchase a set of cone cutters. This would eliminate a " drill bite " causing further damage to the material you are drilling ( in particular.plastics ). I've found them especially handy when you require a snug fit between the material and the fittings being added. Again a true professional at work, delivering quality service to his customers.
I would have done something similar to what you did, but it has been my experience that JB weld, plastic, and vibration do not work together, especially when it gets cold, so I broke down and bought a plastic welder. Works pretty well most of the time. Thanks for the video!
Good fix Erik .i notice you’ve still got the Astro light you’ve had it a while now .i got 2 of Amazon when I saw you with it .and I use the for every thing brilliant light very versatile love the magnet best light I ever had Erik .the Machanics at my local shop bought some to they love them old jimmy West Australia