How to find a Small EVAP leak without a smoke machine

[@gunsofsteele]

My neighbor used the Bic lighter test on his EVAP hoses....once. I miss him.

[@niceguy192]

LMAO

[@jackhodges514]

Unreal

[@vincentnewton697]

I take it he didn't find the leak before he blew himself up lmao I'm sorry theses days with people u mite be telling the truth. Thats kinds scary 😨 lol

[@layneholtz6926]

Swami discusses uses of the word f***

[@darkknight8244]

I wanted to do the same with my 2000 gmc sonoma

[@Matt-vb2jo]

Finally, an actual teacher to teach all of us old school mechanice, these modern computerized cars. Thank you Sir, Salute.

[@realfixesrealfast]

Thanks, I appreciate you taking the time to comment

[@mikemcduffie6879]

3:12

[@MrAmisto]

First thing to do, replace the gasket on your gas Cap. Esp if the car is old. this will cost you around $20 or less. I got this evap code, reset it, a week later it came back, I checked my gas cap and it didn't really feel snug like a new one, so I checked online and I found a recommendation to replace gasket. worked for me.

[@EAPonce-qr7sw]

Great video, thanks for the expert advice

[@danieljamar5639]

BEFORE you watch this long video, which is well done, know that it is not about "How find a small evap leak without a smoke machine" but rather is is about how to understand the evap system and use an expensive professional scanner, IT IS NOT ABOUT HOW TO ISOLATE A LEAK (hopefully that is in part 2, yes there is a part 2 even though this vid is not called part 1.

[@TacticalBuffoonary]

Thanks for letting us know, Im glad I didn’t waste 13 minutes of life watching. 👍

[@moradhaouchine6694]

Everyone is a teacher, but not everyone is a good one, and you Duane, you are a stand out! I have a few questions. In order for the monitor to check for the leaks, both valves have to be closed. How did the canister vent valve close? since it's open when the engine is off. On the large & medium leaks, system passed, , how do you interpret the values shown? what I mean, how would you know whether those values are optimal, or on the borderline of a leak? Again, thank you for video and the wealth of information

[@realfixesrealfast]

Thanks for the kind words. Great question but not an easy quick answer. The ECM has built-in controls for the systems it monitors. So the ECM closes the valves when it starts the test and opens them based on the test results. You would need programmer instructions to get the actual answer. Keep in mind all electronics are simply voltages and ground. All ECMs are binary devices which means they can only read 0's and 1's, not voltages. All data is converted to 0's and 1's and is either an input or an output. Programmers ask the questions as "if, then" format. example, if the valve is open and the test is requested to run, then close the valve. The test runs, results are reported, and the next "if" question is asked. The EVAP test answers are based on time. For example, how long did the vacuum hold? The answer determines the next response (action).

[@joemikos9155]

Absolutely one of the best instructors on KZbin. I appreciate the time you take to instruct and teach. Thank you

[@omyajt]

Not sure why people are saying this is too long. It’s a great explanation. Nice to have an understanding. I don’t need the expensive machine because most auto parts stores can get you the code. But I do like to understand the big picture in the system that I’m throwing parts at.

[@originalabesha7480]

Well explained.We need more professional advisers like this man on you tube.

[@dmorley100]

Good to see you back again. The way I was taught, basically open loop means that the computer isn't using the oxygen sensor/s to determine the fuel control strategy. It uses the TPS, MAP, MAF, and all other engine input sensors, but ignores the oxygen sensor/s reading. Closed loop means it uses all of the above plus the oxygen sensor/s.

[@daviderhahon]

Initially I was disappointed not seeing the direct fix, but once you got to the details, I began to appreciate the video. Really informative and educative.

[@quirksilver5006]

One of the best explanations i have EVER seen.... you explained the entire cycle.... I keep getting "Depollution system faulty" in Peugeot (its a plague in these cars!), i even have thier Computer the agency once no clue yet.... it causes the car to go rough and engine to rattle. I'm doing the smoke trick near engine and going to check the fuel pump (checked the fuel filter seemed new, and cleared it myself even)

[@BoreusRex]

Great video. Really shows how generic troubleshooting techniques always remain valuable. A note to young mechanics, use your head and pay attention. Your time will be spent less on troubleshooting and more on helping your clients and that makes for return customers.

[@coachwilson5967]

Great post. I just hate the fact that these critical valves (purge and vent) are such a pain in the butt to get to. My 2006 Avalanche is a real pain...

[@Ermagawd]

You truly understand your craft! If you where anywhere in upstate NY you’d be my mechanic and my whole families until we died

[@realfixesrealfast]

Thank you Doug, that is a great compliment and makes all my work worthwhile.

[@nunapitchuk]

Thank you for making the video. You are a natural teacher. I really appreciate the background information that really helped me understand how the evap system works. I assume that, if the purge valve had been good then the next step would be to pull and check the valve by the gas tank. I think I will be able to fix my car now thanks to your video.

[@regdad3272]

I like your critical thinking. You used the knowledge of the computer to help you determine a solution. GREAT!

[@46JennyGirl]

Wow, not surprised, but people have short attention spans. I guess this sorts out the good mechanics from the mediocre ones. Really appreciated this video and thought it was well instructed and well produced. The point he makes (which those with lazy attention spans will never understand) is that a little critical thinking in advance and a good understanding of how the systems work saves time and parts costs in the end, because rather than just diving in and randomly swapping out parts (at your customer's cost), we try to pinpoint the most likely cause of the problem from the start using the information the car is giving you. The answer is there - but you need to learn how to analyze the data first. Too bad more mechanics don't take this approach. Will be watching more of his videos. Totally impressed.

[@realfixesrealfast]

Thanks for you comments, Glad you understand the bigger picture

[@daviderhahon]

Now that's an absolute certainty for me..... "Watching more of his videos "

[@yukateco6855]

This man is a natural teacher.

[@queenempress2541]

THANK YOU THANK YOU THANK YOU!!! This was totally the problem.. Changed the purge valve $42.00 @Advance Auto.. 15min to change.. Mechanic charged $40.00 for his time.. Awesomeness.. Pass Georgia emissions no problem!!

[@gradyhernandez4699]

Those purge valves ,(2001 SE caravan) are easy to change location under hood passengers side up front close to headlight

[@marioavalos1385]

mmmm,,, I guess I still keeping my 1975 Chevy,,,, those new vehicles have so many sensor$,,,

[@govindagovindaji4662]

Excellent tutorial. Thank you so very much~! I'm a 70 year old woman and my 40 year old daughter and I are determined to fix this problem. LOL. However, if I were near you, I'd bring it to you for a fixin~!!

[@realfixesrealfast]

I like your attitude, you can do it. Let me know if I can help.

[@DJDevon3]

This is all for OBD-II vehicles that have scan tools, PID's, and enhanced monitors. OBD-I (vehicles made before 1996) have it much harder. Still a great video. The diagram and description of the evap system is spot on. Not all vehicles have electronic canister vent valves or pressure sensors. Have to take all of this into account when diagnosing a vehicle and adapt these procedures for the vehicle design that you are working on.

[@PineHollowAutoDiagnostics]

+DJDevon3 Never seen a pre-OBDII vehicle set an EVAP leak code...so there's nothing to worry about! On that note, I find it silly for the "Check ENGINE" light to come on for issues that have nothing to do with the engine/driveability.

[@DJDevon3]

motoYam82 Not setting an evap leak code (because it doesn't exist on your OBD-I vehicle) is even worse. Good luck figuring out there's an evap problem. :P You might get a faulty solenoid code if you're lucky but that's about it.

[@PineHollowAutoDiagnostics]

+DJDevon3 But the system itself is simpler with no canister valve, since there's no need to check for leaks anyways. The only electronic part is the purge valve which could fail mechanically and not set a code. Otherwise you just use your nose to check for leaks...if it smells like gas fumes, you have a leak lol

[@samd410]

Thanks, You are by far the very best teacher on KZbin . I learned a lot from your videos.

[@jaymeschappy1965]

Next to chris fix yes

[@crawford323]

Very well organized and executed. Good job.

[@eyejedi]

GREAT TEACHING, I AM REALLY LEARNING ALOT, FROM PART 1 and 2, I also have a small leak, engine LIGHT IS ON, going to test my test my PURGE VALVE.

[@jtleon7086]

You'd make a great teacher. That was an informative, succinct description on EVAP. I do pray that my trouble are only a gas cap with the p0456 code. Now onto part 2

[@nordicpride9708]

If it’s a Toyota/Lexus 99.9% chance 😂

[@knwrdeeptube]

This is so amazing. If you can pay some attention and listen, you will end up saving a lot of money, but then again you need some common sense to do that. Absolutely awesome. Thank you sir.

[@nordicpride9708]

Yeah people are too glued to social media for that

[@chembrew1822]

After watching parts 1 and 2, a smoke test would not find this type of small internal valve leak, so we get a lesson on second level diagnostics for evap. To those critical of his fancy computer, getting good data need not be expensive..Various OBDII scanners are avail from ebay or amazon for like $22 (bluetooth to smart phone) or USB to your laptop. You can download and use several free apps or buy cheap add-ons to decode much the same data as the $4500 computer produces. The main limitation is your investment in time and understanding how to maximize the apps and what the significance of the data is.

[@scooter12368]

sure appreciate your videos wish i had more years of life left to understand all you do, even then i wouldn't, memory is a downfall of mine. thanks for your videos. you know allot electrical, mechanic etc. thanks again for illustrations.

[@emptech]

As I've repaired things for customers, I've always explained what went wrong and why I chose the solut9ion. I appreciate how you explained then even adding the cutaway further explains how the system works. I just replaced the solenoid assembly on my 2009 suburban. When I first went under the vehicle, I was not able to find my way, eventually I found the charcoal canister. In reality, it may be a lot more difficult to make the repair than what we saw, videos can be so misleading. Now that I replaced the part, using my OB2 code reader I purchased from NAPA, I can clear the code, the ECL no longer shows on the dash but the code reader says the error is permanent. Is that going to be a problem down the road? Also, I can see you do this for a living, what brand of OB2 device do you have? I'm sure it wasn't cheap. Again, thanks for the video - Jim

[@realfixesrealfast]

Jim, thanks for your comments, and I'm glad it helped. Here is what I can tell you. Many "code readers" simply read codes and can often clear the codes. However, they cannot erase items stored in memory. You would need either a full-scale Scan Tool or an OEM scan tool. Both are expensive. EVAP codes are often stored in memory and many MUST be cleared with one of these expensive tools. If you did fix it there will not be a problem down the road and the SEL should remain off. I use the Snap-On brand scan tool.

[@roberthiggins1468]

Good to see you again. The quality of your instruction is superb!

[@timsain925]

Awesome video, both parts. I don't consider myself a "car guy", just a "cheap guy". I hate to pay someone for repairs I can do myself. The evap system was always a mystery to me. Thanks for the thorough explanation, so I'm not just shotgun throwing parts at it. My hat is off to you kind sir.

[@ronniecullop4099]

great instructor I like the way you explain the system before jumping into the repair well done.

[@PineHollowAutoDiagnostics]

Nice explanation, Duane. I've never found Freeze Frame data to be valuable for diagnosing EVAP systems, since the monitors generally run at cruising speed, but the test result/MIL command can be issued at any time...any thoughts?

[@johnadams3152]

Very well done video. Good explanation of the evap system. If you don't have a smoke machine this is fast and easy way to troubleshoot the system.

[@bum408]

This was awesome!!! No smoke machine, thank goodness!!!!! All I need is a 10,000 dls. Device!!!! Let me get my pocket change...

[@MrMckinney18]

He broke it down he's very knowledgeable and it makes sense I gave be a lead thanks thanks

[@ozzstars_cars]

I'm ready for part 2....glad to see you posting again

[@globalcommerce7654]

Should show how to with a simple cheap machine like this one: kzbin.info/www/bejne/aoOXgmyPYtiKY9U

[@theadversary1188]

I just subscribed to your channel. You are a natural teacher and great at it. After watching this video and pt. 2, I learned more about my vehicle and how it works. I think it now helped me to know what to look for as the engine codes come alone or my CEL stays on like it's staying on now. My mechanic is currently in the process of replacing my PCM on my Honda Accord v6 because we have gone through every repair or part replacement you can possibly imagine, but the CEL never stayed off. We think it needs a new PCM/ECM which is what the first auto repair business told me too. I want to get a diagnostic tool like you have. How much does that one cost?

[@megatronmoneybag8576]

A small evap leak could be sign of bigger problem. I had p0442 code too and thought it was a small problem. i did exact thing what u said on video and couldn't find anything. So i tapped out and took truck to shop. they smoke test it and found out i have a small leak coming from top of gas tank where sending unit and sensor is located. if u have older car thats rusty underneath i advise you to have the shop trouble shoot for you.

[@edgerrr]

To add to my previous post about checking the easiest thing first and my issue being the purge valve on a 2015 Charger, it took more than a squirt of WD-40 to loosen things up. The valve required some throttle body cleaner as well as a couple shots of WD-40 but I think it's finally loosened up. One thing of note is that it's NOT a completely ON-OFF type solenoid in my case. Bluedriver OSB-II shows that it is analog in nature meaning it's variable. New valve is about $25 without tubing to manifold or about $40 with tubing to manifold. This matters because tubing to manifold is difficult (but not impossible) to remove from valve.

[@lacityartproject1720]

This video was too fast for a few people, too slow for a few people but for the rest crystal clear. Thanks for saving me $450 !

[@BPoweredLove]

LA City Art Project 17 How did you save $450?

[@lacityartproject1720]

That's what the dealer wanted to charge me.

[@suharinos]

"without a smoke machine", yeah, now you need an analyzer which is 3 times more expensive, handy !

[@davidhatzenbuhler6888]

Deprecating the information he's providing is not productive. A smoke machine will only pinpoint a real leak. It will not help diagnose failed vent or purge valves nor will it troubleshoot dodgy tank pressure sensors. He has an expensive tool but you don't have to use the same tool he has. There are several bi-directional devices in the $150-$300 range that will diagnose EVAP systems. Not all tools will play well with all vehicles. Even the multi $1000 units do better with some than others. This is why professional mechanics have more than one. Do your homework and find the one that's most compatible with your rig in your price range.

[@MattJonesYT]

The eventual source of the problem would have been hard to find with a smoke machine since it was an internal leak.

[@gregjones8501]

I can’t believe I’ve never seen this video. Oh well catching up now! Thanks Dwayne!

[@jjohnson2560]

The music in the beginning reminds me of opening theme to hill street blues

[@SonofGodly]

I dont have that costly machine either, nice info if you have that code reader , yes a waste of time for most of us. Thanks just the same

[@Lin-vb3cy]

Very helpful. I replaced the defective canister purge valve on my 2014 RAM 1500 Big Horn 4WD 6 cylinder 3.6L after watching this video. Passed the emission inspection after driving 3 'driving cycles'. It is important that you let the PCM set P0456 to inactive and turn off the check engine light. Do not clear the fault code. Otherwise, you would not be able to confirm if the problem is really fixed. This video would be perfect if you explain what is a driving cycle and how many are needed..

[@tonytiger8318]

this is very professional (MTM),I have watched your videos for years , Im glad to have found you videos and teaching, I have made a donation. I will subscribe t o your channel

[@realfixesrealfast]

Thanks for your support I really appreciate it.

[@armaletalia3254]

Hydrocarbon should not be understood as “liquid carbon” because of the prefix hydro-. The prefix hydro- in this case denotes "hydrogen." Hydrocarbons are molecules composed only of hydrogen and carbon atoms. Not all hydrocarbons are liquid at room temperature. Some are gases; others are solids.

[@2pacnasgame]

Perfect video I just notice I think someone else mention your channel before I see why

[@terrywin2661]

AWESOME information here!!! Thanks for sharing your knowledge and experience!!!

[@realfixesrealfast]

you're welcome, thanks for commenting

[@paulhaywood7685]

I have to say....I need you for my teacher

[@singhpk99]

Great explanation for the EVAP syystem. Always goes bad on Fords

[@realfixesrealfast]

glad you liked it, thanks for commenting

[@yvetterenee8256]

Thanks for explaining how the EVAP system works. I like to have knowledge before taking my car to a shop. Ignorance is costly. ☺

[@aromero9243]

It's like when I was in the second grade and asked how to solve 2x5 and two months later after reading a three books, running laps around the play ground, doing some research on encyclopedias, running for class president, bringing apples to the teacher, winning the spelling bee nationals, and making my bed every morning like mom wanted me to I get told "patients, we will start off with division first so you may understand".

[@rustywrench2119]

Great explanation of the system and troubleshooting

[@steelplates3202]

This made my brain open loop. Possible leak

[@jimmyfavereau]

it would be nice if they taught that in school, 'critical thinking' thanks and many Blessings Duane : ) excellent presentation

[@sandyande]

I've not even watched the video yet but we have missed u! welcome back, sandy from Scotland

[@johnhough7535]

I am glad you are showing how to fix a leak made easy,

[@iluvwhtchix]

Excellent teacher! That video time flew.

[@geoff3172]

Great video, and love the method of critical thinking. If it wasn't the purge valve leaking, would you check the next easiest the fuel cap ?

[@vanmeures3689]

I haven't seen a video from you from so long!! your videos are always great and informative !

[@abdyfe]

this is the best mechanic i have seen ..............he know his shit...

[@archie34734]

Great comprehensive instruction on EVAP systems and their repair. Much appreciated!

[@erinquemarroquin6080]

I like the way he explained he has a lot experience

[@newjerseybt]

Whenever I start to worry about small evap leaks, (which trigger the engine money light) I like to watch video eruptions of volcanoes around the world such as Mt. St. Helen's that put out more pollution than all the evap leaks in the world. Then I pay a mechanic $300+ to fix it, in which he uses expensive tools and/or smoke machine to diagnose the problem. (money I could have used to help a sick child) But I must submit to this government edict or fail inspection and have a car with no value until tribute is paid. But it will make me feel better as I go to bed at night thinking that as a member of the hive that I helped save the world one evap leak at a time. My children, when older will thank me. Not.

[@meanpicker]

I thought the info was very informative and it helped me to understand the evap system much better. Thank you for making these videos!

[@constable9793]

Great explanation. But it's still parts swapping, You really didn't need that expensive monitor.

[@jgeorges3061]

IT is always good to see you back with videos full off good info always.thankyou

[@henrygallardo1969]

Great explanation video and visual examples! Thank you

[@12marcomorales]

GOOD JOB i like you explanation very clear thank you

[@geekdiymechanic4539]

Thanks for doing this video. You always do a great job. I know to make a video takes time. I appreciate you sharing your knowledge and experience.

[@advancednutritioninc908]

Excellent Video ... I appreciate him giving the thinking and diagnosis process!!

[@mikewithers7685]

Awesome video ! You are a great teacher .

[@stpierreorama]

INVALUABLE CONTENT! THANK YOU👍

[@dalecocca]

Awesome video - really helpful in understanding the foundations of the problem. Thanks for making this!

[@AndyNav1]

Thanks for this straightforward clean video. I keep getting 2 codes at the same time P1092 & P1093, Pre cat trim too lean and too rich on Bank2. How is this possible. Or is it because something else is going on. Be grateful for your response.

[@samuelkidane6125]

Best explanation I like your way of teaching thanks a lot

[@baowolf0011]

This was extremely informative.

[@altiro4ever]

THANK YOU FOR THE VIDEO YOU ARE A GREAT TEACHER

[@sjagain]

So we can check for leaks without smoke by using an expensive scan tool...Got it!

[@rezzo7290]

this video should be renamed "test and replace a purge valve" because that's all this 2 video series is gonna show you. Some EVAP logic which is good, but if you are on your 40th video, just know you are NOT gonna get the full smoke-less evap fix this video title promises.

[@jaymeschappy1965]

Pop, your a great teacher

[@luisaliceaortiz7791]

Thank you for your time and efforts stay blessed

[@tapia79r4p]

nice explanation on how the evap system works!

[@Kevinb1821]

I learned the hard also to never overfill a gas tank. I destroyed my purge valve doing so. Luckily it was only 70 dollars for a motorcraft oem part and was 2 bolts and 2 quick disconnect hoses to change it.

[@1575murray]

I recently had a service station attendant override the auto shutoff and probably do the same thing. Today I got a check engine light and a P1456 code for a small evap leak. On my 2002 Honda Accord the purge valve is on the back of the throttle body and is difficult to reach.

[@precisiont5188]

Does anyone Know why a hose connected to the EVAP charcoal canister is not connected to anything? Is this normal, like a vent directly into the air, or is this supposed to be connected to something? One side of the hose connects to the canister and the other side of the hose is not connected. Any help is greatly appreciated.

[@bobgriffin3928]

I cannot believe that A holes watch your videos, want your knowledge, and then have the audacity to tell you how to do the video. I have no computer either, but I think you do a excellent job as a teacher. Question: will the on board computer turn the ck. eng. light out once the problem (PO456) is resolved, or will I need a computer to turn it off? ty

[@BPoweredLove]

Bob Griffin Are you joking?

[@ToddKing]

@@BPoweredLove Pull you head out of your butt and understand that not everyone is the Automotive Repair God that you are. BTW, what is your answer to his question?

[@Aybak404]

Best explanation Sir. Thanks💐❤️💐

[@williamsanchez3462]

very interesting ,but ...remember you said "without smoke machine"....so don't use your expensive scan tool

[@debiciufo6543]

great video but how many people have the computer reader you are using??/ looks like a dealership OBD reader, kinda pricey im sure...thanks for the video ..

[@edwardmoon5221]

I have a $15 scanner that can tell me all the same things

[@chrisgatton6611]

Very well explained thank you

[@ckampouris]

This video has a very 90s tv feel to it. 🎉

[@BpgaMusic]

what a masterclass!!!

[@hammerhead6537]

Thanks for this video, great explanation of the system. Thanks for sharing your knowledge.

[@jimmar1285]

This small leak results for two reasons, P0443 faulty connector not completing circiut and remains until completion of satisfactory results P0456 Evap purge valve stuck slightly open

[@jimmar1285]

Found out that Nissan has an extended warranty for all evap codes p0443 455 456 and up to 150,000, Free repair for 2010 +

[@yhenn25]

A very good and informative video, so funny some people commented the video that is not helpful or saying that too much of a talk. If you guys are only thinking of fixing the problem without understanding what is happening to your engine there's two things thst might gonna happen, either your car engine problem migjt get worst or you fix it right. I like the way he explained everything as i clearly understand how things works👍. By then if you send your car at the shop, those greedy mechanics will not be able to fool you the way they steal money from our pocket. Regarding with the tester he used, he's not promoting and or selling what he's using i guess, it's just that, that's what they are using in their shop? We shiuld be glad and appreciate this kind of person sharing us some information what to look for if there's some problem in our car engine.

[@realfixesrealfast]

Thank you. You said it perfectly

[@xVoidCypher]

So, how much pressure does the engine draw when the system is under vaccuum???