'99 Charcoal can delete. Mine is the one not like the others
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So I'm trying to delete the canister in the engine bay. I found many threads about just lookping the lines in the engine bay. I would if I could. Mine only has a feed line, no return. Odd? I'm running a Hydra and don't have to smog anytime soon for years.
https://www.miataturbo.net/attachmen...ine=1337286098 Now under the car by the fuel filter is the what I read as the "true" charcoal canister. The big black box. Line on the top is to engine bay and bottom line disappears into the darkness(assuming gas tank.) https://www.miataturbo.net/attachmen...ine=1337286098 There is a bigger hose (about thumb size) on the other end that goes to this little black canister with some sensor on it. Then goes back through the frame toward the gas tank. Hose disappears in image to the left, then leaves little can, and goes to the circular black thing into frame and disappears. https://www.miataturbo.net/attachmen...ine=1337286098 1-Do I just cap off the line leaving the big box and delete everything forward to the bay? 2-Remove whole canister box? It is a street car so I don't want fumes everywhere. I'm told the hydra doesn't use the canister vent system anyway. Unsure of what to remove and cap off. My concern with just capping off the line at the canister is what happens if it gets full of fuel? Bomb? |
I just removed the front canister and connected the lines together. Never gave much thought to the back one. I'm interested to see what others have done, it gives me great satisfaction to pull useless things off the car. Something about gas fumes tends to make me a little more cautious than normal though.
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My gas boiled out of the line when I was on bandaids (higher pressure) and a hot track day. That's a good sign of an over heating engine.
With the NAs one of the lines off the charcoal canister is clamped to a fitting on the subframe and vented to atmosphere, I'm guessing that's where that second line is "disappearing into the darkness". There are two lines on top of your engine bay canister, one to the rear, where's the other one go? |
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Curly- one hose goes to the can from the back of the car and the other goes to some solinoid next to it. Pic
https://www.miataturbo.net/attachmen...ine=1337553020 Orange arrows are gas vapor. Blue is some sensor labeled "boost" that is a factory looking sensor that goes to the intake manifold. Do I need this with a Hydra? I'd like to delete all of this crap if I don't need it. It doesn't seem to have anything to do with VICS. Any more input as to plugging the charcoal canister at the the can under the car would be helpful. Thanks |
Not sure what the "boost" thingy is, but I have one on my 1994.
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I believe it's for the egr valve. I left mine alone.
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I figured one of the track guys who delete all But required stuff would know. If I can delete the whole bracket of crap I'd be happy. Rigt now I really just want to get rid of the can to make space for my re route hose and clean up the bay. I'm a little over enthusiastic about not needing to smog for the forseable future. Ex Cali guy. I already deleted the egr stuff on the manifolds.
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i got rid of the can.... the solenoid for the can... and the boost/1bar MAP sensor. dont need any of them with standalone.
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When you removed the can did you cap it off in the engine bay or back at the big can by the fuel filter? Slightly concerned of fuel vapor pooling in the can, I guess since the hydra never used the system nothing would really change regardless where I cap it off.
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https://www.miataturbo.net/attachmen...1&d=1337564867
This is an older pic, don't mind the disconnected bov. I just stuck a small bolt though a one inch hose and jammed it over the hard line. Works. |
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I used a vacuum nipple to block off the hardline
https://www.miataturbo.net/attachmen...ine=1337567443 |
Did you remove the rear? Figure out how?
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Just remove the hoses, unbolt, and throw away. :D
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Well hell, that's awesome. I didn't know if that would cause any problems in the rear! Thank you.
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subbed.....so no one knows what the "black box" does or how to remove it?
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...we're all clear on what it does. It's a charcoal canister.
I just took mine off, as said above. |
My plan is to use the hard line for it to make my 99 Turbo car a return (from the rail) fuel system. So I guess I have the green light to go ahead and jerk all that shit out of there and will not have any issues with tank venting or fuel evaporating off? I have read a lot of threads about the canister and some report smelling gas, and extremely poor fuel economy....
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I had to run a vent line back down the frame rail to the rear diff area. Blocking the line made my tank swell, pop and groan.
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Did you install a one way check valve?
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Originally Posted by Amellrotts
(Post 1048333)
Did you install a one way check valve?
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But if you did a vent to atmo line by the tank shouldn't that solve the gas tank groaning in the heat, or would it make the same sounds when the valve closes when cold and the tank wants to cool down? As in the reverse of when it gets hot and swells. After it gets hot, vents, cools but he valve is closed, and makes the tanks try to contract.
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Originally Posted by TorqueZombie
(Post 879658)
Slightly concerned of fuel vapor pooling in the can, I guess since the hydra never used the system nothing would really change regardless where I cap it off.
The logic to run it is pretty simple, IIRC it's basically open whenever there's vacuum and the engine's warmed up and the revs are in some range. It's not like the EGR where to make it work you need another set of 3d maps. --Ian |
That is true. I guess I never updated after finding that out. So yes the Hydra does use the evap stuff. No longer Hydra though, go all the MS things.
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No issues with just yanking everything out yet. Looks good... so far. Just a datapoint.
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I did like sixshooter and removed everything including the hard line and egr and all related solenoids as the hydra uses none of it. I just ran a hose down by the fuel filter with a lawn mower filter to keep bugs from crawling into it. It attaches to the tank where the char. cannister did. No issues with vapors.
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Originally Posted by flounder
(Post 1048297)
Just remove the hoses, unbolt, and throw away. :D
Originally Posted by Nagase
(Post 1048299)
Well hell, that's awesome. I didn't know if that would cause any problems in the rear! Thank you.
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I would remove all the evap stuff, both black boxes, all the lines, then plug the cap/rollover valve on top of the gas tank, the one feeding both charcoal cans.
If you just plug this or any other part of the purge system then the gas tank will hold mad pressure. Gas caps are designs to hold pressure, but they are easily fixed. I was even able to keep the rollover ball valve on my NA cap, just took the spring from the plunger so it's always venting. |
Originally Posted by deezums
(Post 1299924)
I would remove all the evap stuff, both black boxes, all the lines, then plug the cap/rollover valve on top of the gas tank, the one feeding both charcoal cans.
If you just plug this or any other part of the purge system then the gas tank will hold mad pressure. Gas caps are designs to hold pressure, but they are easily fixed. I was even able to keep the rollover ball valve on my NA cap, just took the spring from the plunger so it's always venting. Any pictures of cap mod? |
Yes, just out the cap. I didn't take any pictures, but there's a flat diaphram pushed closed by a spring, I just removed the spring, or the diaphram.
Na caps have three plastic tabs to push in, then the whole thing comes apart. |
Delete the whole mess?
Does anyone have the answer to how to delete the whole mess of lines to the tank and both charcoal canisters (front and back? I have an NB1 and just want all of it gone the correct way
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I just did this on my 2000. I capped the port from the mani to the from charcoal canister, removed the front canister, hoses, and hard line to the back of the car. In the rear, I removed the large charcoal canister and left the filter (~2" diameter canister with one hose on each end) and the vent (small plastic thing attached to the chassis where the hose ends).
Just connected the hose from the tank right to the bottom of the filter. No explosions yet, though I do notice faint gas smells on occasion. That makes sense considering what I removed. |
Diagram in this post
In diagram, red means remove, green is jumpered together. Don’t over-fill the tank or gas will run out of the vent. DNM |
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