glad you think so!! yes I have some time through end of year so hoping to churn content more often!!

Where might one get one of these smoke generators, such as yours ??

Interested in your build?🤔👊

Nice to meet you as well!

​@SchrodingersBox how much would it cost to do the repairs

My guess would be around $400-$500 up to $1000 if the whole cannister needs replacement.

Not science teacher. An actual scientist.

Thanks for letting me know! I won’t change a thing.

Good to know!! I do try to be different and actually explain the processes.

@@SchrodingersBox It works very well...the thorough explainations.

Thank you! Cheers!

@@SchrodingersBox Thanks to you for sharing your knowledge with us ✌

Thank you for the compliment. I do get a lot of mention of my clear English enunciation. I think it is appreciated by people who do speak English as first language.

Oh man you are preaching to the choir hahaha!! Yeah I think anyone who watches my videos for any length of time quickly learns how much I hate crawling under cars. about 6 months ago or so I did buy a quickjack 3000TL midrise and while not nearly like yours, it’s a massive massive improvement over jackstands. I just can’t put a 5000lb SUV on it. I do plan to also get a 7000TL which would allow me to lift these bigger trucks and SUV’s. 3-1/2 feet is still such a massive different over jackstands I think I can live with that!!

@@SchrodingersBox for years I had the vision of having a commercial lift so when I built my shop I made the walls 14’ tall. If I didn’t have a place with enough clearance then what you have is the way to go and always get as much lifting capacity as you can afford. Industry standard lifts are usually 7 or 9K but they guy who sold me my lift said he could get me a 10K lift for an extra $100. An offer I couldn’t refuse.

Oh man that’s a great deal!! yeah I have 11 ft ceiling so I think the best I could potentially do is maybe a MaxJax which would let me sit on a rolling stool under the car. I don’t know- we’ll see how it goes but right now I am happy- also that RaceDeck floor makes laying on the floor a hell of a lot better too!!!

Thank you!!! I think soon you will be interested in my website at www.schrodingersboxqm.com too!!

Hey good to see you back and I am glad you absorbed that tidbit of knowledge lol!

Good to hear- I have quite a number of viewers from Egypt!!

Yes for sure a filler hose problem can cause this as well. often with that issue you will hear the gas gurgling in the filler tube.

Good to see you back regularly Dave, reminds of the old days haha. Yeah the system I described is a GM system and for the most part the little ball flow meter would be helpful but I have found other systems can be vastly different. some have pumps to test the system for leaks. others actually calculate the volume of fuel in the tank and the outside temp to calculate what must be the pressure of the vapor in the tank given those conditions. they can any number of one-way valves and complications quite different than this simple system.

Oh and yeah- my garage totally stinks now hahaha

Always glad to see you here my friend.

Hey good to see you my friend!! thanks and there will be more videos coming as I have some extra time around the holidays!!

@@SchrodingersBox thanks for replying that fast brother good to see u too posting videos and you will be AWESOME in my book always and thanks for the sharing the knowledge.

Glad to hear it! I love it too hahaha

Haahahaha. Glad you are paying attention!!!! fricken spiders!!

Thanks, I actually do that a lot. In fact in a very few cases I was so interested in doing a video on the problem that I even paid for the parts too.

@@SchrodingersBox Now that's what I call being curious!

So nice of you

Oh man I should have pointed that out!! yea that’s totally true and in just a couple months ago had exactly that situation. canister was full of gas and destroyed it.

I doubt that You ruined any back in the 70’s.

@@brianw8963 Yea the systems were primitive back then,but this was when gas was .50 cents/gallon,so if the pump stopped on$ 9.05 I would round it up to $10.00,almost 2 gallons. There were times I felt like bouncing the car to cram that last few cents in lolololol. This was when a lot of cars had the filler cap behind the license plate so if I spilled over a little the customer never knew it. I found a website called TitleMax and they have a list of gas prices going back to the 30's,and I was suprised to see that adjusted for inflation prices have been at $3.00 or above for most of that time. I started pumping gas on my 16th b-day in 1973 right at the start of the oil crises when prices went from .40 to .60 in a short time.People were shouting at me like I was responsible,and they watched the pumps like a hawk to make sure they got what they paid for. This was way before self-service was even a dream,and I discovered a way to get back at the nasty customers by "hanging" the pump on them.If I had a previous sale for only 1 or 2 bucks I could hang the nozzle back on the pump,but not totally shut the reset lever off. So the next car there would be a dollar or 2 before I started pumping.It took a delicate touch but I did it occasionally and never got caught.

oh wow thanks!!!!

Glad it helped and to be honest- if I wasn’t filming I most definitely would have used a scantool to command that vent solenoid closed however I know most of my viewers don’t have one so I showed how to identify the circuit and manually activate it. but yeah a scantool would have made it easier for sure. also useful would have been data from the tank pressure sensor from a scantool as well!!

You are very welcome as always!!

HahahHa how come no one else commented on that?? I thought it was brilliant lol

@@SchrodingersBox I guess it was overshadowed by the usefulness of your video being the stand out quality :P

would canned air not be safe to use?

Dude! So nice to see you again!! Where the hell have you been??!!

@@SchrodingersBox i was busy , sometimes i watch a video of yours without commenting its my bad. thanks for asking Matt!

Good question. while the charcoal may adsorb some (certainly not at that volume) in my experience it flows through like what you saw with the vent. also- even if the smoke was all absorbed, the air would still be felt and even heard passing through and it did not. but so can tell you for sure on previous times I have smoked an EVAP it just billows right out the vent tube meaning the cannister is not holding the smoke. it’s also a reason when you must close the vent solenoid when checking leaks- so the smoke doesn’t just leave out the vent.

@@SchrodingersBox Thanks for the reply man! Exactly what I needed to know.

can’t say without seeing what the technician tested.

@@SchrodingersBox They checked the exhaust pipe for the sound coming from underneath, and that is where I suspect they may have thrown things out of place as the heat from underneath is reaching the cabin too. ☹

yeah I think I just published it before it totally finished processing. should be good now.

It sure is!

Absolutely!

Good question. It’s not an issue at only 1PSI.

you have to run the same diagnostics as shown but maybe I would start with the purge valve since it seems to work with engine running.

what is the voltage at the vent solenoid showing and what happens when you manually purge?

@@SchrodingersBox I’m not sure I don’t have a voltage meter. I haven’t began my investigation yet. I was just looking for any advice. Where should I start. I was thinking of pulling down the vent tube to see if the end filter is caked in dirt and start there. Otherwise I was going to start unplugging hoses at different points to see if I can pinpoint a blockage. I will be getting into this on the upcoming weekend. Thank you so much for the quick response. Appreciate the help. No engine light on dash. Just issue at the pump as stated in my first post.

Always start with the easiest and most basic things first. That would be a voltage check at the solenoid. You don’t even need a DVOM. I use a $3 test light.

Start with the basics- what data was indicating the purge valve and tank sensor were bad? Did you apply vacuum to the tank sensor through the purge valve and it failed to activate and the sensor voltage was zero?

Could be bad gasket, bad evap valve, bad pressure valve, bad overflow valve….

Yes you can however you won’t get the 15% off.

@@SchrodingersBox Thank you for the reply. The thing is, I am from Tanzania and I think the site ships only in the US. Am i right?

should be pretty simple- measure the amperage on the circuit to see if there is indication of short to ground as the first step.

what is the fuel tank pressure sensor voltage?

Always trying to keep you on your toes!!

I have heard that but you would need some additional catalyst to cause an explosion. just putting air in a fuel tank won’t do it. Others say that the pressure is what does it but you would have to put like 200 PSI to have that happen- the evap would blow long before that.

Your issue sounds like a vent valve actually but the cost can vary tremendously depending on the design of the cannister. This particular one was unusually expensive at $680 total because many of the evap components are on the unit itself. Others I’ve done were in the $250 range.

What happened when you energized the vent and purge solenoids?

A car would run fine without the vent or any evap for that matter however look how easy it is to just diagnose the issue and repair it properly.

Oh my god that is far and away the biggest cause of the issue. never overfill the tank for the exact reason you said!!

any block in the system would cause it. sounds like the vapors are “burping” the gas - later models have preventative for this.

It depends on the design. Most vent solenoid a default open which would put smoke out the vent. Some default closed which would not emit smoke.

@@SchrodingersBox 2002 Silverado 5.3L When smoke is introduced to the mentioned line, smoke is observed right at the solenoid, not the vent line that’s travels adjacent to the gas fill hose at the gas filler neck. Canister is new but I haven’t tested it yet. Doubt that it's a defective canister. Also wonder if there's an obstruction in the gas fill hose to the tank. The gas neck flapper is intact so not sure what could be causing an obstruction if there was one. I can continuously add approximately 4 gallons of gas before the pump trips, when the gas pump nozzle/handle is in the normal position. If I re-position (angle to one side) the fuel/gas pump handle, I'm able to continuously add approximately 8 gallons of fuel before the pump trips.

Go to www.schrodingersboxQM.com and click the link that pops up.

It depends on the design. Check the vent solenoid first.

Oh it’s always good to check in and see what the other side is up to.

@@SchrodingersBox I guess... But still! 😂

it is likely still a partially clogged evap that is made worse when tank is filled because the higher fuel level compresses the vapors tighter. the same procedure I showed would have to be used.

@@SchrodingersBox Thanks Matt. I appreciate your response. I enjoy your teaching very much. I've reached the age of retirement... and have retired. I've always worked on my own vehicles and helped friends and family with theirs for decades. I have also always been good at troubleshooting practically anything on or in a car but lacked the knowledge to properly deal with automotive electrical issues regarding sensors and computers. I now have a good variety of test equipment and am working on developing the knowledge to provide advanced diagnostics. You have helped a lot along with a couple other teaching channels. I've been providing some troubleshooting for a few people and it's going quite well so far. The goal: create a better me, keep my mind active and firing those neurons by actually thinking, make enough extra money to pay for all of this electronics, and mostly help others by giving a correct, low-cost diagnosis to those who can't afford to pay a high priced shop an exorbitant fee for changing parts. As you're aware, there are a lot of people who desperately need their vehicles fixed but can barely afford their next meal. I've been there and now hoping to give back. Thanks again for what you do.

Finally someone caught that!!!!!!!

I immediately ordered the smoke machine.......

Good choice!!! I hope you got the newer model- the one with the self contained battery and flow gauge! It’s the only one I use anymore!

it’s at my website www.schrodingersboxqm.com

You can not purchase from the website. It merely links to Autoline Pro.

@@SchrodingersBox Thanks!

Autoline Pro has a new Ventus smoke machine. Going to give the Ventus a shot.

Yes I have it. It’s AWESOME!!!!

I would very simple manually activate the solenoids and check for proper operation.

@@SchrodingersBox sorry my fingers dont work well, so many spelling issues

Not at all! Man I used to do that all the time!!!!

Yeah I also do that but while filming didn’t want it dripping in my face or even worse on the camera lol.

This one was only $180 but I have seen as high as $380

Not in this case but great guess and I test for it because it is a valid variable.

Great tip!

The spiders are called "Yellow sac spiders", and Mazda and Suzuki both had recalls because of them. It's easy to make fun of Scotty, but he's just going off of real articles that are out there... Just a quick search pulls up a CBS News article named "Spider webs in fuel lines prompt Suzuki recall" --- where they also mention the Mazda recall right at the beginning of the article. If you simply search "spider that is attracted to gas fumes", it will promptly list the Yellow sac spider, and talk about the recalls, etc.... cheers

the ol banana in the tailpipe trick lmao

Oh for sure for sure!!!! The small leaks are the worse and really a gas “sniffer” might be the only way to find them.

@@SchrodingersBox 😵😵😵

Why would you replace the purge solenoid for that issue? What data showed it was the problem?

I just changed everything. Because I was not getting a engine check light code

Ah. Well I can’t help find the issue without any data.

What data showed the canister AND vent valves were bad?? That seems really unlikely. What was the vacuum measurement on the vent valve showing it failed?

a very common reason is people overfilling after the nozzle shuts off and gas contaminates the canister.

Is there any evap related data at all? None of that other data seems relevant. Need evap data.

@@SchrodingersBox all I have is a $60 scan tool. Foxwell nt301 I believe it is.

That’s more than sufficient! That’s gives live data. You don’t even need it honestly. Just use a dVOM at half the price.

Never seen an videos on KZfaq showing a dVOM being used for P0455@@SchrodingersBox

well that’s even crazier than scotty is hahaha!! but I would still triage it at the bottom of the list and I would certainly completely disconnect from the solenoid back when clearing the line out. Also in looking at it in more detail, while tons of vehicles were recalled there was never a case shown where damage to the EVAP or fuel system ever actually resulted. the procedure it turns out was to replace the vent tube with one containing a screen and to replace fuel tank if a blockage was actually found.

Yes. Schrodingers_box@yahoo.com

@@SchrodingersBox thank you so much !!

Usually fails from over filling fuel tank

@@timothyerlenbaugh2908 correct, I had to replace the charcoal canister and drop the tank to clear the vent lines with air