Besides having an actual evaporative emissions class, like I have for multiple manufacturers, this is probably the most comprehensive vid on this. If your canister is cracked or a hose is cracked ,you usually end up with a p0456 code, gas cap or large failure is a p0455 code.
I love the videos, you guys have helped tremendously with issues i run across on my 91. The playback volume is k8nd of on the low side though. Like you're standing juuuust a little too far from the 🎤
Nice to know how it works but I’ll still be removing mine as it’s old and worn out and I actually partially like the smell of the vapors, reminds me of my childhood spent riding old dirt bikes and atv’s around, they had a little smell but it was just part of the experience to me. once your moving you can’t smell anything anymore so it’s really not a problem unless you just hate the smell 😂
To a certain degree, this is 100% normal. The check valve in the system only releases pressure under certain situations, and some pressure in the fuel tank is normal and expected.
@@FlyinMiataVideo I have similar observation on my 1990 na. Sometimes the pressure is so high that I cannot twist open gas cap after driving for a while - I have to wait for the car to cool down in order to fuel up. I do not smell gas in my cabin or trunk, so I assume the charcoal canister is still doing its job. I've seen some online forum suggesting cleaning up the pre-filter. How and where can I locate that filter? Have you replace or clean it before?
My two cents: In an EVAP system, the activated carbon does not absorb fuel vapors in the same way it might absorb odors or contaminants in other applications. Instead, the activated carbon provides a large surface area for the fuel vapors to condense onto, called adsorption. Adsorption is a surface process that transfers molecules from a liquid or gas to a solid surface. The molecules that are transferred are called adsorbates, and the solid surface that attracts them is called the adsorbent. The reverse process of adsorption is called desorption. Think of it as a solid phase vapor condenser using adsorption.
I have a NB2 miata with additional charcoal canister and two other plastic containers in the passenger rear wheel well (next to fuel filter). What are those? I've been getting a fuel smell in cabin and it does seem to smell on that side. I replaced the shoe-box-shaped charcoal canister and then I noticed a solenoid-looking thing next to it and another, smaller cylinder "can" next to that all connected in some way to the charcoal canister. Again, none of this is engine bay. What are those and how can I test/clean them to see if they aren't purging the vapors correctly (eg causing smell in cabin)? I assume that trio in the passenger rear wheel well eventually push the vapors to the engine bay's canister and solenoid?
The most common cause of fuel smell inside the cabin is either a clogged check valve connected to the fuel pump, or a crack in the fuel filler hose in the trunk. We'd check those first before bothering with any of the other eval components. Feel free to reach out to our customer support team directly through phone or email if you need tips to trouble shoot and track that down!
Great video, thank you. Would love to see a video on the EGR system similar to what you did here. Also, you mentioned posting the names of some salvage companies you could get some used evap. components from. Can you post links for those companies?
I Have a 1999 Miata with a P1450 code I replaced the Vapor Canister Purge Solenoid and Vapor Canister Vent Valve, with no luck some times think I smell gas?. engine runs rough, bogs on fast pedal acceleration. Under the rear of the car looks like the square charcoal canister if that's the only one I don't know It don't look damaged. "I need help"
Some of these Evap systems are more elaborate than others and a shop can run a function test to cut down on your parts replacements. Or, if you're just looking for leaks in the system, I'd use a smoke machine to help out.
Its pretty ridiculous that they dont design them to be serviceable. I cringe thinking about not changing aquarium charcoal, let alone 30 year old fuel saturated charcoal. What kind of drivability issues can a bad solenoid cause or leak in the system other than a CEL? My doesn't even work. I mean the light itself comes on at start as it should but I cant get it to toss anything after that. 😂 Someone would make bank if they made anodized serviceable ones.
Yeah, you'd think they'd have a service interval on these, but I guess they expect that a customer would complain about a CEL or stinky fuel smell, which would lead to the charcoal canistor being replaced.
Maybe you can post the extra footage where you show that fly an alternative use for the charcoal canister. lol. Nice job keeping your cool with that constant distraction! I'll second another comment that a video on the EGR system would be interesting. Thanks for the informative content!
hmmm....did i miss the episode where you installed the coolant tank overflow? I have been wanting one of those a long time now, will be ordering one from you guys soon
I sometimes smell gasoline in the cabin, but only after several hours of highway driving. I've replaced the fuel pump and the rubber seal around the fuel pump assembly. I don't smell anything in the trunk. Wondering if it's the evap system.
Most Miatas have a check valve in the cabin connected to the fuel pump that frequently goes bad or gets clogged over time. It's the primary culprit if you smell it in the car but not in the trunk or under hood.
Might consider reworking some of this. That canister in the NB that was referred to as the charcoal canister, is actually "not" the charcoal canister. That is just a vapor canister meant to allow the build up of vapors where the purge solenoid draws from. The actual charcoal canister is in the passenger rear wheel well. I'm sure many will watch this vid and think theirs is busted or cracked b/c they can't hear charcoal in the canister.
Hmmm, thanks for letting us know! I'm familiar with the larger canister at the right rear but thought this smaller one had charcoal in it too. We'll see what we can do about editing. Thanks for watching.
Timely video, since on my 1999 I have a check engine light and a gas vapor odor in the trunk area. I've replaced the gas cap already, what other components at the rear of the car should I be checking? I recall seeing some other valves and another charcoal canister on a parts diagram but I can't find that now.
A common problem is the hose connecting the fuel filler with the tank. Rust forms underneath but you can’t see it. Many remove the hose and sand it. I have a similar issue and plan on doing the same soon.
Can confirm the NBs get cracks on the bottom where they are sealed together. They are totally empty FYI and don't contain charcoal. I'm just going to replace it with a catch can full of charcoal because I'm tired of the fumes after driving
19:49 if you have an OBD2 Miata to get rid of smells notice if you unplugged the battery. If you did, get a code scanner and check your OBD2 system and perform a drive cycle.
I have several if anyone wants to give me money for them.......after I remove the slack from the throttle cable, then next thing I always do is remove the canister and loop the hose. No one is going to come after you for removing an item that no longer works and replacements are no longer available, remove it, free up access room to the oil filter, and the alternator throw it away and sleep like a baby. I do and so can you.
I knew most of what you described, but what I'm interested in knowing more in depth, is what is the computer logistic timing of opening the solenoid and under what conditions does it cycle? What did you all do to your LS 3, V8 conversion since it was fitted with a different operating system? I'm also a firm believer in keeping the EVAP canister function. Plus, you didn't mentioned that if the fumes are just allowed to freely escape when the EVAP circuit is removed, then in the hot sun you're just wasting gasoline through evaporation. Good video, but I'd like to know how the Habu conversion's EVAP was handled. Thanks
I'd first ask your passenger about that, then make sure that all emission and fuel hoses are in good shape. We had one car that came into the shop and the clamp on the filler neck was loose. If you can't find anything wrong, sometimes having the fuel tank more full than empty will help.
could this be where my mystery fuel smell is coming from on my 99 nb? ...although id swear it smells like its coming from the trunk area... always enjoy yalls videos, thank u
Usually a bad evap canister will give a fuel smell under hood. The rear of the car is probably gas cap or fuel neck hose. In the cabin is probably the check valve on the fuel pump. BUT there are other possibilities as well. Feel free to reach out to our customer support team directly through phone or email if you need help troubleshooting.
I really dislike climate activists, Ive heard every fairytale they can think of for 55 years and NONE of the fear porn has come true lol Thanks for the video, this is a good explanation about what to me is the ugliest piece of gear under the hood haha
Props buddy for making this whole video with that fly never letting up and not losing your cool.
Besides having an actual evaporative emissions class, like I have for multiple manufacturers, this is probably the most comprehensive vid on this.
If your canister is cracked or a hose is cracked ,you usually end up with a p0456 code, gas cap or large failure is a p0455 code.
Thanks! We appreciate that. And thanks for the notes on the codes!
Good stuff, learning as fast as my old brain will allow.
Great job despite your winged fan!
He was very persistent!
I love the videos, you guys have helped tremendously with issues i run across on my 91. The playback volume is k8nd of on the low side though. Like you're standing juuuust a little too far from the 🎤
I didn't know there would be Ron spoilers!
Look away!
I saw that too, is that a turbo i see back there???
@tapageur3000 yeah it's their FM turbo kit
@@firstkyu1 hell yeah brother 🤙🏾
Nice to know how it works but I’ll still be removing mine as it’s old and worn out and I actually partially like the smell of the vapors, reminds me of my childhood spent riding old dirt bikes and atv’s around, they had a little smell but it was just part of the experience to me. once your moving you can’t smell anything anymore so it’s really not a problem unless you just hate the smell 😂
There’s a decent amount of vacuum pressure released when i open my gas cap after driving my 1990. Is this a problem?
To a certain degree, this is 100% normal. The check valve in the system only releases pressure under certain situations, and some pressure in the fuel tank is normal and expected.
@@FlyinMiataVideo I have similar observation on my 1990 na. Sometimes the pressure is so high that I cannot twist open gas cap after driving for a while - I have to wait for the car to cool down in order to fuel up.
I do not smell gas in my cabin or trunk, so I assume the charcoal canister is still doing its job. I've seen some online forum suggesting cleaning up the pre-filter. How and where can I locate that filter? Have you replace or clean it before?
@@FlyinMiataVideo thanks!
My two cents: In an EVAP system, the activated carbon does not absorb fuel vapors in the same way it might absorb odors or contaminants in other applications. Instead, the activated carbon provides a large surface area for the fuel vapors to condense onto, called adsorption. Adsorption is a surface process that transfers molecules from a liquid or gas to a solid surface. The molecules that are transferred are called adsorbates, and the solid surface that attracts them is called the adsorbent. The reverse process of adsorption is called desorption. Think of it as a solid phase vapor condenser using adsorption.
Thanks for watching!
I have an odd Miata question. Is there a way to get replacement evap information stickers like under the hood?
We don't have any information how to get those. You might try your local Mazda dealer?
I have a NB2 miata with additional charcoal canister and two other plastic containers in the passenger rear wheel well (next to fuel filter). What are those? I've been getting a fuel smell in cabin and it does seem to smell on that side. I replaced the shoe-box-shaped charcoal canister and then I noticed a solenoid-looking thing next to it and another, smaller cylinder "can" next to that all connected in some way to the charcoal canister. Again, none of this is engine bay. What are those and how can I test/clean them to see if they aren't purging the vapors correctly (eg causing smell in cabin)? I assume that trio in the passenger rear wheel well eventually push the vapors to the engine bay's canister and solenoid?
The most common cause of fuel smell inside the cabin is either a clogged check valve connected to the fuel pump, or a crack in the fuel filler hose in the trunk. We'd check those first before bothering with any of the other eval components. Feel free to reach out to our customer support team directly through phone or email if you need tips to trouble shoot and track that down!
Great video, thank you. Would love to see a video on the EGR system similar to what you did here. Also, you mentioned posting the names of some salvage companies you could get some used evap. components from. Can you post links for those companies?
SNS Mazda Parts and Treasure Coast are probably the big ones that most people recognize.
I Have a 1999 Miata with a P1450 code I replaced the Vapor Canister Purge Solenoid and Vapor Canister Vent Valve, with no luck some times think I smell gas?. engine runs rough, bogs on fast pedal acceleration. Under the rear of the car looks like the square charcoal canister if that's the only one I don't know It don't look damaged. "I need help"
Some of these Evap systems are more elaborate than others and a shop can run a function test to cut down on your parts replacements. Or, if you're just looking for leaks in the system, I'd use a smoke machine to help out.
@@FlyinMiataVideo thanks for the response, I will smoke it, I'm thinking from the tank filler and hose from the canister
Its pretty ridiculous that they dont design them to be serviceable. I cringe thinking about not changing aquarium charcoal, let alone 30 year old fuel saturated charcoal. What kind of drivability issues can a bad solenoid cause or leak in the system other than a CEL? My doesn't even work. I mean the light itself comes on at start as it should but I cant get it to toss anything after that. 😂
Someone would make bank if they made anodized serviceable ones.
Yeah, you'd think they'd have a service interval on these, but I guess they expect that a customer would complain about a CEL or stinky fuel smell, which would lead to the charcoal canistor being replaced.
Sorry Mike, couldn't take my eyes off your new little friend 🪰, 😆
Does Mike Pence know his fly is seeing other Mikes?
Maybe you can post the extra footage where you show that fly an alternative use for the charcoal canister. lol. Nice job keeping your cool with that constant distraction! I'll second another comment that a video on the EGR system would be interesting. Thanks for the informative content!
hmmm....did i miss the episode where you installed the coolant tank overflow?
I have been wanting one of those a long time now, will be ordering one from you guys soon
This is kind of a sneak preview. We install the cooling upgrades in an upcoming video. Keep an eye out for it!
@@FlyinMiataVideo big teasers lol I saw them other go fast goodies too
Does an aftermarket ECU take that selenoid operation in charge?
It can, depending on how many I/Os it has and how it's set up.
@@FlyinMiataVideo mslabs ms3 mini ecu
@ Thanks for the added info.
🪰
I sometimes smell gasoline in the cabin, but only after several hours of highway driving. I've replaced the fuel pump and the rubber seal around the fuel pump assembly. I don't smell anything in the trunk. Wondering if it's the evap system.
Most Miatas have a check valve in the cabin connected to the fuel pump that frequently goes bad or gets clogged over time. It's the primary culprit if you smell it in the car but not in the trunk or under hood.
Might consider reworking some of this. That canister in the NB that was referred to as the charcoal canister, is actually "not" the charcoal canister. That is just a vapor canister meant to allow the build up of vapors where the purge solenoid draws from. The actual charcoal canister is in the passenger rear wheel well.
I'm sure many will watch this vid and think theirs is busted or cracked b/c they can't hear charcoal in the canister.
Hmmm, thanks for letting us know! I'm familiar with the larger canister at the right rear but thought this smaller one had charcoal in it too. We'll see what we can do about editing. Thanks for watching.
Timely video, since on my 1999 I have a check engine light and a gas vapor odor in the trunk area. I've replaced the gas cap already, what other components at the rear of the car should I be checking? I recall seeing some other valves and another charcoal canister on a parts diagram but I can't find that now.
Could be a cracked or leaking rubber hose, they do eventually age and wear out.
A common problem is the hose connecting the fuel filler with the tank. Rust forms underneath but you can’t see it. Many remove the hose and sand it. I have a similar issue and plan on doing the same soon.
Can confirm the NBs get cracks on the bottom where they are sealed together. They are totally empty FYI and don't contain charcoal. I'm just going to replace it with a catch can full of charcoal because I'm tired of the fumes after driving
19:49 if you have an OBD2 Miata to get rid of smells notice if you unplugged the battery.
If you did, get a code scanner and check your OBD2 system and perform a drive cycle.
I have several if anyone wants to give me money for them.......after I remove the slack from the throttle cable, then next thing I always do is remove the canister and loop the hose. No one is going to come after you for removing an item that no longer works and replacements are no longer available, remove it, free up access room to the oil filter, and the alternator throw it away and sleep like a baby. I do and so can you.
Lol was one the first things I removed lol
7:51 current problem on my NB2
I knew most of what you described, but what I'm interested in knowing more in depth, is what is the computer logistic timing of opening the solenoid and under what conditions does it cycle? What did you all do to your LS 3, V8 conversion since it was fitted with a different operating system? I'm also a firm believer in keeping the EVAP canister function. Plus, you didn't mentioned that if the fumes are just allowed to freely escape when the EVAP circuit is removed, then in the hot sun you're just wasting gasoline through evaporation. Good video, but I'd like to know how the Habu conversion's EVAP was handled. Thanks
Please reach out to our customer support team directly, they can probably provide the info you are asking for.
What about smells inside the car with the top up ?
I'd first ask your passenger about that, then make sure that all emission and fuel hoses are in good shape. We had one car that came into the shop and the clamp on the filler neck was loose. If you can't find anything wrong, sometimes having the fuel tank more full than empty will help.
that fly is very distracting lol
It was a definite hassle, but Mike's a professional and kept his cool!
could this be where my mystery fuel smell is coming from on my 99 nb? ...although id swear it smells like its coming from the trunk area... always enjoy yalls videos, thank u
The fuel filler neck is notorious for degrading and allowing fuel vapor into the trunk area
Same car same problem. New fuel filler hose on the way hopefully it solves the problem.
thank u
Usually a bad evap canister will give a fuel smell under hood. The rear of the car is probably gas cap or fuel neck hose. In the cabin is probably the check valve on the fuel pump. BUT there are other possibilities as well. Feel free to reach out to our customer support team directly through phone or email if you need help troubleshooting.
@@FlyinMiataVideo i will... thank u
I really dislike climate activists, Ive heard every fairytale they can think of for 55 years and NONE of the fear porn has come true lol
Thanks for the video, this is a good explanation about what to me is the ugliest piece of gear under the hood haha