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Unread 07-03-2010, 05:43 PM   #1
nichboy
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Fuel Cannister

There's been allot of talk about the fuel cannister, not sure what the PO did to mine based on the pic what can you guys tell me. Thanks.


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Unread 07-03-2010, 08:11 PM   #2
CrazyHorse6
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Seems he just removed all the hoses except for the fuel tank return. I've got all mine disconnected as well. If the vapors don't bother you, you don't have inspections in your state, and if you are not a tree hugger, don't worry about it!

In all seriousness though, it just absorbs the vapors coming from the carb and the fuel tank to minimize the impact on the environment. It shouldn't effect performance or fuel economy whatsoever.
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Unread 07-03-2010, 09:25 PM   #3
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Take a look at this thread, BioTex has a great picture of the plumbing for the canister should you decide to hook the three open ports back up.

http://www.jeepforum.com/forum/f8/bu...lated-1059810/
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Unread 07-04-2010, 07:26 AM   #4
nichboy
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If the vapors don't bother you, you don't have inspections in your state, and if you are not a tree hugger, don't worry about it!
None of the above, so i will leave it as is. Now i need to figure out if the PO bypassed the computer chip. Thanks guys.........
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Unread 07-04-2010, 09:58 AM   #5
keith460
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The only thing you have hooked up to the Charcoal Canister is the vent tube from the Roll Over Check valve and not the fuel return as someone else has posted.

Unless you like the smell of raw gas I would get that thing hooked up like it should be. You are missing the vacuum lines for ported vacuum from the carburetor, full manifold vacuum and carburetor bowl vent.
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Unread 07-04-2010, 10:41 AM   #6
walkerhoundvm
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Quote:
Originally Posted by keith460 View Post
Unless you like the smell of raw gas I would get that thing hooked up like it should be. You are missing the vacuum lines for ported vacuum from the carburetor, full manifold vacuum and carburetor bowl vent.

...Depending on which carb he's running, which we don't know. If it's an MC2100, like mine, that all goes out the window and he's all hooked up. I would, however, try to find some rubber caps if your check valves are intact. Mine aren't, so the canister is basically an orphan.
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Unread 07-04-2010, 11:05 AM   #7
mcmud
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Quote:
Originally Posted by walkerhoundvm View Post
...Depending on which carb he's running, which we don't know. If it's an MC2100, like mine, that all goes out the window and he's all hooked up. I would, however, try to find some rubber caps if your check valves are intact. Mine aren't, so the canister is basically an orphan.
-N
Keith is right, it should be connected as complete as one is able, fuel vapors are nauseous at best. Pressure build up in the tank is greatly reduced with the canister connected and functioning.

If the MC carb is being used it would have the "S" ported nipple and a 'tee' at that line would be used as a purge valve signal, preferably through a CTO but a direct hook up is near as good. The purge line could the be connected to any manifold vacuum source. Then if the carb has no bowl vent of course that canister nipple would need to be plugged.
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Unread 07-04-2010, 11:19 AM   #8
walkerhoundvm
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Quote:
Originally Posted by mcmud View Post
If the MC carb is being used it would have the "S" ported nipple and a 'tee' at that line would be used as a purge valve signal, preferably through a CTO but a direct hook up is near as good. The purge line could the be connected to any manifold vacuum source. Then if the carb has no bowl vent of course that canister nipple would need to be plugged.
I maintain my position, but agree you should have it hooked up as much as you can. As I mentioned, both my check valves are rotted, so there is no link between the tank and the canister. No CTO, so nowhere practical to connect that port to. I also have a Clifford 6=8 intake manifold, no outsource as near as I can tell. I'd appreciate hearing if you know or would recommend otherwise, though. Where were you on the follow up to this thread, McMud?

http://www.jeepforum.com/forum/f8/oc...lated-1050276/

Just regurgitating what MR last told me in that thread, but as I said (sorry to threadjack here, nichboy, but I think this'll help you out, too), I'd love to know the right way to do this. There is still a smell of gasoline coming from the engine bay after hot shut-off. Some from the rear, too, but mostly from the front - I can almost narrow it down to the carb itself.
-N
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Unread 07-04-2010, 11:54 AM   #9
nichboy
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Not sure what carb i have, i'll post a pic latter.
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Unread 07-04-2010, 01:25 PM   #10
nichboy
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Hope you guys can tell from this pic.

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Unread 07-04-2010, 01:41 PM   #11
Drednot
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Not an expert but that looks to be a relatively unmolested factory setup with a Carter BBD with the mixture control solenoid.

i would tend to say you should try to reconnect everything,emissions test or no, just to make everything run as it should.

When you have a complex stystem like this, all it takes is a malfunction in one of these seemingly innocuous and unneccessary sub-systems to throw the whole thing out of whack, driveability-wise.
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Unread 07-04-2010, 03:20 PM   #12
mcmud
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nichboy,
Here is a link that will allow you to reconize what each device is and it's intended function. Jeep Adventures Under the Hood

And an image that is contained in that web site which will be a good and quick reference in how to connect the cannister to your BBD.
vacuhose.jpg  
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