what is the carbon can for and can i get rid of it?
#1
Junior Member
Thread Starter
iTrader: (1)
Join Date: Sep 2009
Location: Pittsburgh, pa
Posts: 78
Total Cats: 0
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Hello guys im trying to clean up my engine bay and make some room. Im running a 1.6 miata(soon to be 1.8) running on megasquirt, dont need to worry about emisions. I want to get rid of the carbon can and just wondering what it does and if i have to route anything special once i do.
Also while were on the topic what else is unnecessary under the hood? thanks
Also while were on the topic what else is unnecessary under the hood? thanks
#3
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
the gas tank is a closed system, the carbon cansister traps gas vapors and later while running at certain times will let them be sucked into the engine to burn them there instead of letting them escape to atmo. Another emissions device that also keeps the vapors from building up pressure in the gas tank
#5
Cpt. Slow
![](/mt2011/images_td/ranks/supporter1.gif)
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,326
Total Cats: 1,181
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Is it better to cap it or just put a hose from where the canister goes to the subframe?
#8
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Cap it, and your **** will blow up like NOS does in fast & furious (though N2O isn't even flammable, let alone combustible)
Pull that black bitch out of there, it is connected to 2 hard pipes on the chassis. Take a length of hose and connect those two hard pipes and consider the job finished.
Pull that black bitch out of there, it is connected to 2 hard pipes on the chassis. Take a length of hose and connect those two hard pipes and consider the job finished.
#9
Elite Member
iTrader: (12)
Join Date: Nov 2009
Location: Harpers Ferry WV
Posts: 1,516
Total Cats: 20
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I pulled mine all the way back to the fuel filter and then bent it up in the passenger rear fender well as far as I could get it. I have not seen any fuel come out of it even with the 255 pump.
#10
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
It has been a while since I looked at the charcoal cannister, so I could be wrong. I removed mine a while back (from my track car). If you remove the canister but do not remove the control valves, the tank will still vent. Regardless of what you remove, you should connect the two hard lines with a short hose. That will at least dump any accumulated fuel down through the subframe.
There is a control solenoid on top of the gas tank. I believe it is controlled by one of the solenoids near the charcoal canister - the one that gets a vacuum signal from the intake manifold. If you remove the vacuum tube, my guess is that the vent will never open anyway.
There is a control solenoid on top of the gas tank. I believe it is controlled by one of the solenoids near the charcoal canister - the one that gets a vacuum signal from the intake manifold. If you remove the vacuum tube, my guess is that the vent will never open anyway.
#12
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Schematic:
Solenoid "Closed"
|VTA|--|purge solenoid|--|charcoal canister|--|VTA|
Solenoid "Open"
|fuel tank|--|purge solenoid|--|charcoal canister|--|VTA|
Solenoid Diagram
Off<----------------------->On
|VTA|==\Solenoid/==|Fuel Tank|
................||........................
................||........................
................||........................
.....|Charcoal Canister|............
Solenoid "Closed"
|VTA|--|purge solenoid|--|charcoal canister|--|VTA|
Solenoid "Open"
|fuel tank|--|purge solenoid|--|charcoal canister|--|VTA|
Solenoid Diagram
Off<----------------------->On
|VTA|==\Solenoid/==|Fuel Tank|
................||........................
................||........................
................||........................
.....|Charcoal Canister|............
#14
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Schematic:
Solenoid "Closed"
|VTA|--|purge solenoid|--|charcoal canister|--|VTA|
Solenoid "Open"
|fuel tank|--|purge solenoid|--|charcoal canister|--|VTA|
Solenoid Diagram
Off<----------------------->On
|VTA|==\Solenoid/==|Fuel Tank|
................||........................
................||........................
................||........................
.....|Charcoal Canister|............
Solenoid "Closed"
|VTA|--|purge solenoid|--|charcoal canister|--|VTA|
Solenoid "Open"
|fuel tank|--|purge solenoid|--|charcoal canister|--|VTA|
Solenoid Diagram
Off<----------------------->On
|VTA|==\Solenoid/==|Fuel Tank|
................||........................
................||........................
................||........................
.....|Charcoal Canister|............
#16
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
link to very good write up with pics:
http://www.mx5nutz.com/forum/index.p...5&#entry223895
[quote name='COLINK@JDMPASSION' date='22 April 2008 - 07:10 AM' timestamp='1208873406' post='223895']
Tool required
10mm spanner/socket
pair of pliers
2 or 3 small cable wraps
stanley knife
Positioned at the side of the radiator header tank is the charcoal canister see picture
![Name: DSCF1331.jpg
Views: 1041
Size: 56.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/190162d1501222123-what-carbon-can-can-i-get-rid-dscf1331.jpg)
if you remove the top two hoses on the canister one pulls off and the other has a clip on it
![Name: DSCF1335.jpg
Views: 657
Size: 71.8 KB](https://www.miataturbo.net/attachments/engine-performance-56/190163d1501222123-what-carbon-can-can-i-get-rid-dscf1335.jpg)
there is a hose connected to the throttle body this must be took off this is again a push fit
![Name: DSCF1332.jpg
Views: 452
Size: 61.2 KB](https://www.miataturbo.net/attachments/engine-performance-56/190164d1501222123-what-carbon-can-can-i-get-rid-dscf1332.jpg)
just above the header tank there is a connector this must be unplugged as well
![Name: DSCF1330.jpg
Views: 400
Size: 72.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/190165d1501222123-what-carbon-can-can-i-get-rid-dscf1330.jpg)
now the two bottom hoses must be diconnected one has a clip on the other is a push fit
![Name: DSCF1333.jpg
Views: 519
Size: 58.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/190166d1501222123-what-carbon-can-can-i-get-rid-dscf1333.jpg)
![Name: DSCF1334.jpg
Views: 477
Size: 59.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/190167d1501222123-what-carbon-can-can-i-get-rid-dscf1334.jpg)
once these have been disconnected the canister can be lifted out, you will be left with two open ended pipes see picture
![Name: DSCF1338.jpg
Views: 499
Size: 72.5 KB](https://www.miataturbo.net/attachments/engine-performance-56/190168d1501222123-what-carbon-can-can-i-get-rid-dscf1338.jpg)
by using the bottom pipe from the canister you can join the two pipes together with the two cable wraps as in the pictures
![Name: DSCF1340.jpg
Views: 360
Size: 82.5 KB](https://www.miataturbo.net/attachments/engine-performance-56/190169d1501222123-what-carbon-can-can-i-get-rid-dscf1340.jpg)
![Name: DSCF1341.jpg
Views: 381
Size: 61.8 KB](https://www.miataturbo.net/attachments/engine-performance-56/190170d1501222123-what-carbon-can-can-i-get-rid-dscf1341.jpg)
with the connector that you took off i just taped it back to the wiring loom see picture
![Name: DSCF1342.jpg
Views: 432
Size: 50.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/190171d1501222123-what-carbon-can-can-i-get-rid-dscf1342.jpg)
on the throttle body you will have the open ended connection see picture
![Name: DSCF1345.jpg
Views: 468
Size: 53.3 KB](https://www.miataturbo.net/attachments/engine-performance-56/190172d1501222123-what-carbon-can-can-i-get-rid-dscf1345.jpg)
this needs to be blocked off,i used a blank that was on the end of one of the fixing bolts on the rear lights see picture, this must be blocked off so if you cannot find one of the rear light blanks then use a peice of the small section pipe from the canister fold over and use a cable wrap to make a blank.
![Name: DSCF1344.jpg
Views: 453
Size: 40.0 KB](https://www.miataturbo.net/attachments/engine-performance-56/190173d1501222123-what-carbon-can-can-i-get-rid-dscf1344.jpg)
so that it is like this
![Name: DSCF1346.jpg
Views: 431
Size: 53.3 KB](https://www.miataturbo.net/attachments/engine-performance-56/190174d1501222123-what-carbon-can-can-i-get-rid-dscf1346.jpg)
if you remove the bracket that the canister was attached to(two 10mm bolts) then this is what you have taken out
![Name: DSCF1347.jpg
Views: 533
Size: 102.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/190175d1501222123-what-carbon-can-can-i-get-rid-dscf1347.jpg)
here is a picture of the engine bay minus the charcoal canister
![Name: DSCF1358.jpg
Views: 492
Size: 97.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/190176d1501222123-what-carbon-can-can-i-get-rid-dscf1358.jpg)
i must say it took me longer to upload the pictures and write this article than it did to do the job.
[/quote]
http://www.mx5nutz.com/forum/index.p...5&#entry223895
[quote name='COLINK@JDMPASSION' date='22 April 2008 - 07:10 AM' timestamp='1208873406' post='223895']
Tool required
10mm spanner/socket
pair of pliers
2 or 3 small cable wraps
stanley knife
Positioned at the side of the radiator header tank is the charcoal canister see picture
![Name: DSCF1331.jpg
Views: 1041
Size: 56.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/190162d1501222123-what-carbon-can-can-i-get-rid-dscf1331.jpg)
if you remove the top two hoses on the canister one pulls off and the other has a clip on it
![Name: DSCF1335.jpg
Views: 657
Size: 71.8 KB](https://www.miataturbo.net/attachments/engine-performance-56/190163d1501222123-what-carbon-can-can-i-get-rid-dscf1335.jpg)
there is a hose connected to the throttle body this must be took off this is again a push fit
![Name: DSCF1332.jpg
Views: 452
Size: 61.2 KB](https://www.miataturbo.net/attachments/engine-performance-56/190164d1501222123-what-carbon-can-can-i-get-rid-dscf1332.jpg)
just above the header tank there is a connector this must be unplugged as well
![Name: DSCF1330.jpg
Views: 400
Size: 72.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/190165d1501222123-what-carbon-can-can-i-get-rid-dscf1330.jpg)
now the two bottom hoses must be diconnected one has a clip on the other is a push fit
![Name: DSCF1333.jpg
Views: 519
Size: 58.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/190166d1501222123-what-carbon-can-can-i-get-rid-dscf1333.jpg)
![Name: DSCF1334.jpg
Views: 477
Size: 59.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/190167d1501222123-what-carbon-can-can-i-get-rid-dscf1334.jpg)
once these have been disconnected the canister can be lifted out, you will be left with two open ended pipes see picture
![Name: DSCF1338.jpg
Views: 499
Size: 72.5 KB](https://www.miataturbo.net/attachments/engine-performance-56/190168d1501222123-what-carbon-can-can-i-get-rid-dscf1338.jpg)
by using the bottom pipe from the canister you can join the two pipes together with the two cable wraps as in the pictures
![Name: DSCF1340.jpg
Views: 360
Size: 82.5 KB](https://www.miataturbo.net/attachments/engine-performance-56/190169d1501222123-what-carbon-can-can-i-get-rid-dscf1340.jpg)
![Name: DSCF1341.jpg
Views: 381
Size: 61.8 KB](https://www.miataturbo.net/attachments/engine-performance-56/190170d1501222123-what-carbon-can-can-i-get-rid-dscf1341.jpg)
with the connector that you took off i just taped it back to the wiring loom see picture
![Name: DSCF1342.jpg
Views: 432
Size: 50.7 KB](https://www.miataturbo.net/attachments/engine-performance-56/190171d1501222123-what-carbon-can-can-i-get-rid-dscf1342.jpg)
on the throttle body you will have the open ended connection see picture
![Name: DSCF1345.jpg
Views: 468
Size: 53.3 KB](https://www.miataturbo.net/attachments/engine-performance-56/190172d1501222123-what-carbon-can-can-i-get-rid-dscf1345.jpg)
this needs to be blocked off,i used a blank that was on the end of one of the fixing bolts on the rear lights see picture, this must be blocked off so if you cannot find one of the rear light blanks then use a peice of the small section pipe from the canister fold over and use a cable wrap to make a blank.
![Name: DSCF1344.jpg
Views: 453
Size: 40.0 KB](https://www.miataturbo.net/attachments/engine-performance-56/190173d1501222123-what-carbon-can-can-i-get-rid-dscf1344.jpg)
so that it is like this
![Name: DSCF1346.jpg
Views: 431
Size: 53.3 KB](https://www.miataturbo.net/attachments/engine-performance-56/190174d1501222123-what-carbon-can-can-i-get-rid-dscf1346.jpg)
if you remove the bracket that the canister was attached to(two 10mm bolts) then this is what you have taken out
![Name: DSCF1347.jpg
Views: 533
Size: 102.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/190175d1501222123-what-carbon-can-can-i-get-rid-dscf1347.jpg)
here is a picture of the engine bay minus the charcoal canister
![Name: DSCF1358.jpg
Views: 492
Size: 97.4 KB](https://www.miataturbo.net/attachments/engine-performance-56/190176d1501222123-what-carbon-can-can-i-get-rid-dscf1358.jpg)
i must say it took me longer to upload the pictures and write this article than it did to do the job.
[/quote]