Come along as I have a look at a customers 2005 Buick LeSabre that came in with a very small EVAP leak. This was an easy one as long as you know how the EVAP system on a GM works. They are perhaps one of the simplest in the industry.
-Enjoy!
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--Eric & Vanessa O.
Disclaimer:
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.
-Enjoy!
If an SMA Video has helped you out please consider giving using "Patreon" to help support us. The videos take real time to create and pull us away from real work that pays our bills. CLICK HERE: https://www.patreon.com/southmainauto
CHECK OUT OUR "SMA SWAG" STORE! Go on Teespring and get your very own SMA merch!
https://teespring.com/stores/the-sma-store
If you don't like Patreon feel free to use the "PayPal Me" link: https://www.paypal.me/SouthMainAuto
The South Main Auto Amazon Store:
https://www.amazon.com/shop/southmainautorepairavoca
AES Wave Automotive Diagnostic Tools: https://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=2525b91fc8e906e8215984074c9d9e8f&go=https://www.aeswave.com/Miscellaneous-p9347.html
Thank you for all the continuing support!
--Eric & Vanessa O.
Disclaimer:
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.
Hey there viewers! Welcome back to the South Main Auto Channel that's a 2005 Buick LeSabre It's got the big Three, Eight Money lights on all Tails hooked up. it's over there scanning doing its thing. Once that's done, we'll see what Coda has in it. Probably an EVAP code because it's a Buick and not a whole lot of things go wrong with these. but lots of evap troubles so we'll find out and then we'll see what's wrong with it. I wasn't too far off was I All right. So what do we have here? A large evap lake? So your classic P0455 that was the only code in it oddly enough. So we're going to pop into the control unit right to the powertrain. We already know what the code is, so let's go into Live data see if we can learn something here and then we'll go into evaporative admissions. It'll be a good place to start. We just want to see does our fuel tank pressure sensor work. There's a 1.47 volt one and a half, but close to where it should be. The EVAP plot history is from a weak vacuum. It'll release that tile the PCM perceives. It shouldn't really be anything else in here that we need to know about. So let's think about this. We have a large leak that could be caused from. you know from weak vacuum from No Purge function. it could be caused from an actual leak. It can be caused from a missing gas cap. you know, lots of lots of different things. but but the PCM is actually looking for is it closes the canister vent valve so you know that'll have to close. Then it will draw a Purge on it with the purge valve and then it needs to see change in fuel tank pressure. So we have three items there that need to work. So let's do this. Let's back out. We're gonna go to some function tests here or active test. maybe go to engine and then we want to find the cancer bent valve. We want to see if we can hear it and noisy in here today, but let's see if we can hear it I don't know if you guys can but I hear clunking away back there. so we turn it on and essentially if the system were sealed on a warm day like today, it's I don't know. First week in November but it's still pretty warm out. it's in the 70s today. I Think we would see this building pressure. You know our fuel tank pressure would change with the canister vet valve clothes. you know, some natural vacuum or natural uh leak detection. it would you know start to increase as the fuel is volatile but we can see there's no change there. We definitely hear it so that's interesting. Let's uh, take and start it up real quick. Okay let's close the vet valve. Foreign ly getting drawn into a vacuum but our Purge is not even turned on so let's open it. we go back to atmospheric pressure. Purge valve. is not on. We should have no vacuum on the system. Closed the vent valve, we shut the back door, but the old Purge valves up there giving her a little sucky. sucky because we're drawing it into a vacuum. So there. Just like that, we diagnosed it right from the driver's seat. it's a on hands. Let's go up and give it a whack with a screwdriver. Well there it is down there. easy. There fella appears me, looks original to me, nice and Dusty we're gonna give her one of these like I Say right now you can see that it's still trying to pull it into a vacuum. However, it's not being commanded on so it shouldn't fixed it. Look at that. it's no longer drawing it into a vacuum because we closed the vent valve so it's no longer bending. But we can see that it's not drawing it into a vacuum anymore. But look at that. it will finally. Hey, we get every one of those so that's all it needs is the canister purge valve. So let's do this. Let's turn this off. So now we're back bending to the atmosphere. Let's shut the engine off. Stand right there. Now we're going to key back on. So we're key on engine off I Think it's in the 70s. It's 68 in here. It feels like it's the 70s. So now I'm going to close the vent valve. So now that it's closed, my assumption is it's going to start to build pressure. but I could be wrong because it may not be quite warm enough. The reason it wasn't before is because our vet valve here our purge valve was stuck open. Now we still may have other leaks because it is closed, but I don't see a rapid increase in pressure. I'm going to order a purge valve because we know it's bad. I'll leave that closed here for the few minutes while I do that and we'll come back and check to see if we have an increase in pressure. All right. I Ordered one from Chevrolet I won't have it until Tuesday today's Friday So the only one Napa had was the Dorman one and want to play the stupid game if that one's been on there since 05. We're just going to get OEM because it's only eight dollars more than aftermarket so we'll get the brand new. OEM However, the good news is in a few minutes it took us to call a Chevy If I can get this out of glare, you can see we do. We are starting to build pressure albeit not a ton but some. so when I open this, it should go back in to you know, zero atmospheric. So just open and we're back to atmospheric pressure. So that tells us a lot. You know might not seem like much to you guys but it tells us a the system is sealed, it works perfect and B it's it's sealed and works perfect I Don't know what all it tells us. it tells us that it's sealed and it has the ability to to build pressure on its own even though the car doesn't utilize that as any part of its. Diagnostics We can use it as our Diagnostics because we know that the car indeed has no leaks in the EVAP system. but we just have a crappy purge valve because we could see that and we figured this all out in like a minute. So that's it. We just, uh, we move on with our life. Now we'll put the cover back on, we hand the customers keys and say Hey you come see me on Tuesday fella and I'll pop that on for you out in the parking lot and he's happy and I'm happy and you're happy at least I Hope you're happy folks. Uh, so kind of a Cheesy video easy you know Diagon on this thing and I hope it kind of gives you guys at least a little insight. If you're working on, you know GM or any other evap systems. I mean GM probably has the number one, most failure prone EVAP system on the planet and they do. I Mean it's just a matter of fact, doesn't matter where you live, all the EVAP systems on these things are broke. But beyond that, the best part about them is they're a really simple system to work. However, we get a ton of these cars and trucks in from other shops which I don't understand to fix evap problems. and it's there's only three components. Uh, kind of. I mean you have your Purge your vent, your fuel tank pressure sensor. All three of those things have to work and then the system has to seal and that's about it and you know it can't be plugged. You know there are some Oddities that you'll run into now and then. but if you can fix these, I mean these evap systems are very similar to the Ford and Honda and Nissan and Mazdas and you know the only thing they're kind of different from is Toyota. They got their own little nut job thing that they do. but other than that, these are pretty simple systems and you can find out a lot of information without even putting the car in a lift without busting out a smoke machine. Really? without getting your hands dirty. Uh, just by knowing how they work. Looking at the data and you know how can you apply what you have and power in your hand, you know, with a scan tool or whatever and figuring it out. So hey, that's I'm not trying to sell you on it. However, if you'd like to buy yourself an ALT Just kidding, forget about it. go in that comment section questions, comments, Concerns: Instinct Facebook You guys know what to do. Just my reviewers. but I can do it. You can do it. Thanks for watching.
SOLD
Eric, Thanks for your videos. They are enjoyable. Can you go to the chalk board and draw a typical vapour venting system complete with solenoid valve and purge valve. I am having a hard time to understand how the whole system is put together and how it operates. I would appreciate a Purge System 101 lesson. Thanks
Hiya Eric
I'm happy.
Good stuff thanks
Thanks!
I have a 2002 Buick Lesabre with the same issue. Replaced purge valve and didn't fix issue
Great video. Very informative.
You did one a while back where the GM fuel tank pressure sensor was the culprit. So this video was another one that helped me understand the EVAP system better. Thanks
3.8 is a great engine, it's a shame that in the FWD application the rest of the gm drivetrain is garbage………
Dorman products. For those technicians who love their job so much they get to do it twice.
Awesome work Eric O.!! 👍👍
At least he had a 3800 , that was a great engine
I agree with Dans learning curve, nothing cheesy here! Your a great technician, and if I lived near your shop, you would be the only person that would touch my car!!! Thank you for the videos!
not cheesy, good job
I’m getting older but am happy to report that my purge valve isn’t leaking (yet)
BATTLE OF THE SCAN TOOLS !! BATTLE OF THE SCAN TOOLS !!!
Good, do I don't know what it means. Do I have one of those, has never showed up…
Everyone seems to have a love for those big 3.8's. 😊
"Buick Dealers hate him", Find out the secret with this one simple trick".
Yeah, at the outset I was like looks like summer, is this a current video? It sure is winter up in the Rockies man. any day now.
Good engine, in Australia we had a razed aluminium intake manifold and RWD🇦🇺
Really learning a lot from you, Eric. Thanks
Hell I was getting my cheque book out to buy somethin' ,you sweet talker Mr O !
Hi Eric, I'm a big fan of you, could you please make a demonstration video on how the EVAP system works and how to diagnose it?
Thanks in advance 🙂
I would love to buy myself an Autel — but the price is just a bit too steep for a DIY weekender like me. I wish the cheaper OBD-II tools had bi-directional control like that, so you can command things to turn on and off to help with diagnosing a problem. Unfortunately it's $1,200, $1,500, or even as much as $1,800 to get a tool that does that. Worth it for a full-time shop. Not worth it for the DIY'er.
No effort diagnosis for No Effort November. 👌
hp tuners can permanently fix these evap codes, Just sayin.
Got a 2001 lesabre with a gas cap loose on the message center and a 440 code, tried a brand gm gas cap a brand new chant cap but still get the code and message.
if you were going to chase an evap leak on your jeep 4.7 how would u go about that and where would u begin?
Awesome
Bobs your uncle.
"The only code in it" Pretty good car I'd say. 2005 ? Yeah, pretty good. I had a '94 Pontiac Sunbird, of all things…….had it for 200,000 miles with VERY few issues.
i always learn from your videos
I'm happy.
good bet, thank you.
Toyota evap systems are just on another level of over engineered overcomplicated nonsense 😝
Since you only did a quarter of the work, did you charge the customer a quarter of the labor/diagnosis/removal/replacement cost ??? Inquiring readers/subscribers would like to know !!!!!! 🔍🔎❓❓❓👍
When working on my cars, I’ve found myself muttering things under my breath such as “come on, baby!” when I’m struggling a bit and. “There’s your problem, lady” when I make a discovery. 😊
I miss my old Bonneville with the 3800, that motor was such a gem. Sure it'd eat coil packs sometimes and the intake manifold gasket was perpetually leaking but the mechanicals of that engine were just incredibly rock solid. I wish I could buy a car with one in it today, honestly.
But I don't want to forget about it… I want to buy the Autel scanner, or the Topdon with the oscilloscope if I can afford it. Lol Great video, we always need a refresher on some of the diagnostic processes you do!!
So you're telling me parts cannon? 🙂 3 shots max.
I got the money light on again on my 03 Mazder. Yes, the classic P5 with the 2.0L inline 4 pot. previous codes were the P0455, the classic P0090, the classic P0660. Now, I have no idea what, except that it could be the same things as I've not dragged out the old scan tool to see and then clear, it did that on the first go ust came back on a few days ago after clearing and it remaining off for about a month without any doing anything to it.
Anywhoo, if it is those codes, suspect it may be the purge valve that has gotten intermittent. It only has, 195K+ miles on it and occasionally smokes upon startup, and clears up pretty quickly,. once moving after sitting for several days. Then again, it could be a liking fuel injector but who knows? car still runs fine otherwise.
hi great work as usual, this may sound silly but what pointer are you using on your autel i cant seem to find one that works and my fat fingers are frustrating me 😁
What a coincidence, i did the same thing on an 02 earlier today.
Does the autel have the ability to close the vent valve and control the purge valve at the same time? I can do that on our strapon scanner and its very useful for diagnosing evap problems.
You didn’t pay me for hitting it. You paid me because I knew where to hit it
Easy Peasy!
O! just saw the scan tool…Many thanks..now make videos on how to use it.. Peace DVD:)
"Buy" YES! share the scan tool you use.. please DVD:)
Would like to see you do a video on scan tools: what to check first and such…thanks DVD:)
That 3800 will still be purring like a kitten long after road salt has killed the rest of it. Best engine ever in my opinion
Done tons of evap diags. Never thought to look at fuel tank pressures running to look for a bad purge. Very nice tool to add to the belt👍
Okay here's a question for you should the EGR leak smoke out of the vent hole that it has on the back of it when smoke testing . As always enjoy your videos
Great explanation. I’m happy 😃
.Actually, this video really helped me understand the EVAP system. Thanks, once again, Eric.
What’s up Wednesday??
Sorry, I can't buy the Autel now, I just bought the Astro 1828 v2 3/8 drive. Maybe next year. 😝
Can you please help me out with a truck my buddy Eric
I like watching your videos my friend Eric they're very helpful 😎👍
eric you always mention that toyota evap is a special beast, can you do a video on explaining them? or at least why are they so different than all the rest and what makes them complicated.
Cheesy video? Never! Always worth a watch Eric. I always learn something, even at 65 yrs old. Thanks
Nice quick Diag. Thanks Eric
For us dumb people, can you do a whiteboard of how the pressure system works next time? TIA
Imagine if they kept using these 3.8 and just kept perfecting them. My assumption is the engines started to be to good so they started going down hill with the 3.9 to 3.6 to penstar. They could have easily adapted the 3.8 to rondezvous, Arcadia, equinox etc. And they would had been some decent reliable vehicles instead of junk 😂. I am guessing the car manufacturers where loosing to much money making an actual reliable so they had to change things up.
Very good
Yup, I had a 2006 Buick LaCrosse and can't tell you how many fuel fill caps were replaced on it.
They would work fine for a while and then boom money light would come on again.
Used to fix my tv by banging on it.
Mines the charcoal box under the seat not by the gas tank. Pain in the butt. 2yrs still on. I'll get to it 1 day
Great video!!! great demo of scan tool diagnostics. this is also an outstanding example of knowing what right looks like and understanding the system and how each component functions.
The first video I ever watched on this channel years ago was a similar Buick that just had its ECM swapped and nothing worked right. That was a great video and they've all been great. Thanks Eric O.
Thank you.
The tool used is a seal puller SP8PA (Mac Tools) which is a rebranded Cal-Van tool 49600
I'm hooked on your logical process to solving any automotive issues. Can't wait for the next repair adventure . You are the Colombo of automotive mysteries !!!! 👍👍👍
"Quick & Dirty" ??? Usually its Long, Painful & Dirty when i do it…
( I am talking about working on cars here )
I have an 05 LeSabre, had the same code last year. Replaced the part and it fixed it. Nice that it's right out in front and dead easy to get at.
May be elemental to you but us Dummies need instructions!!! Thanks!!!
Awesome video by my friend Eric
Nothing cheesy about good diagnostics. Good honest mechanic diagnosing an EVAP system with several possible fail points, and showing that it is item (A)! Nothing cheesy. Your diagnostic on a Ford, do not recall the model, but it was the one that you had the come back on. But in your video you said, customer says car is hard to start after refueling. That tip aided me in feeling 100% sure the purge valve on my 2017 Impala had failed. Unplugged the line at idle had vacuum. Bought new GM valve and fixed. Keep the info coming Eric. Thank you
I need your help! My wife’s Nissan Rogue gets loud between 55 and 65 MPH on the highway, and quiets down above those speeds. Everything looks fine, aside from minor tire wear. I don’t see any cupping on the tires or anything that would cause this. The only thing I can see that’s remotely not great is grease leaking from the driver side ball joint, but it seems solid aside from that. Rear tires are newer than the fronts.
Any ideas?
I didnt give these vehicles the respect they deserve back in the day, id love a roadmaster or lesabre beater that i dont have to worry about.
The difference between you and the other shops is you’re a Tech and they are parts changers.
This man needs to be a teacher.
Good to the point lesson
Nice work
Great information from you always. More more!
Test don't guess. Good job.
vantastic video
what if you don’t have a professional shop and don’t wanna spend $1200 on a scan tool? The world will always need people like you.
Hi always looking forward to a SMA video and this was another epic W
Not a criticism but do you think you can possibly add a hat 🎩 or two to the merch store appreciate any consideration
God Bless and PEACE ☮️
I want one o' them there Buicks, back when they were still Buicks and not a Chevy Cruze with lipstick smushed all over it.
Another great information video.. learning so much from you Eric O.
Lucky for you the grass does not grow in November so you could hear those valves opening and closing.
Diag'ed in a few minutes. "1 hour minimum time".
Whoa baby! Look at that vinyl roof! This IS your fathers Buick.
Showing the steps on a simple hand drawn EVAP system diagram would 100% help in understanding this diagnoses. Not being unthankful for your videos though.
Ah, yah, and you keep trying to tell us you are nothing special. I like these quickies!
I like when you predict what the problem is, and then proving What the problem is