Carbon Caniste Removal

[book-ends]

Hello Everyone,

I realize that there are a few posts in regards to this topic, but, for whatever reason, I am still having problems understanding EXACTLY what it is that I need to do in order to remove my carbon canister. Hopefully, with your help, other people will be able to use this information as well............

I added the scans below from my FSM in order to help describe my problems. I think that I will start with what I know. By the way, I am dealing with a 91 DOHC motor. I don't know if this is different for the SOHC version:

There are FOUR lines leading into and out of the canister itself:

1. Vacuum line2. Purge line3. Vapor line4. Unknown line coming out of the canister bottom and into........frame?

I am under the impression that if I remove the canister, I will need to leave the Vapor line (coming from the gas tank) open to the atmosphere and NOT CAPPED OFF. The Purge line which runs to the intake manifold will get capped off (right?).

What do I do with the Vacuum line that eventually runs to that mess of lines by the EGR unit and that untitled line that runs out of the bottom of the canister?

If someone could please clarify these points, I would be very grateful. Lastly, does removing the canister have any adverse effect aside from the potential atmospheric destruction?

THANKS!!!

[book-ends]

Here is the other image:

[Nismo_Freak]

Cap purge and vacuum line... leave vapor line open and away from heat.

[book-ends]

Thanks, but what about that line that's under the canister.........the one that apparently disappears into the frame?

[Nismo_Freak]

Dunno... someone borrowed my FSM so I don't know where exactly it goes. If I had to guess it's a drain line of some sort in case of overflow?

Just leave it un-capped.

[89S13SILVIA]

just rip everything out the canister and the emmisions control on the right of the engine and cap off any vaccum lines under throttle body and the line that sticks up in the air under and back a little that leads to the vapor plug in i just got done doing this and it frees up alot of room

[NISTECH]

the line that goes into the frame is a vent line to allow the system to draw in fresh air. if you leave the vapor line open to atmosphere. I strongly recommend you devise a filter for it. it is not nessasary to leave it open since the fuel cap has a 2 way valve to allow air to be drawn into the tank if it develops any type of vaccum. it also will allow pressure to blead off in the event pressure rises in the tank. If you leave the vapor line open with out a filter on it you may draw foriegn material into your tank and ultimatly plug or damage your fuel pump and screen.

[book-ends]

So just to verify........cap the vapor line, or leave it open but with a filter?

Thanks again.......sorry I'm so slow.

[corn322]

what's the purpose of the carbon canister?

[89S13SILVIA]

nothing just to make the car enviroment freindly

[TurboKA37]

is there any purpose in taking it off other than freeing up engine space?

[GroundZero]

no

[Nismo_Freak]

nothing just to make the car enviroment freindly

It stores fuel vapors from the gas tank and eventually releases them into the intake manifold to be burnt.

[NISTECH]

So just to verify........cap the vapor line, or leave it open but with a filter?

Thanks again.......sorry I'm so slow.

filter it would be best.

[book-ends]

Thank you very much everyone for your input!!!

[BaliLover]

Yeah, um... ooops.... Alright, I yanked my Ka and tossed the canister, but now I'm not too sure where the vapor line is. What does the vapor line come off of, is it run from the fuel tank or elsewhere?

[GroundZero]

the vapor line comes from the fuel tank.

[allthrottlenobottle]

what kind of filter would you use on the vapor line?

[book-ends]

I was thinking about using one of those very small air filters that you find on snow-mobiles or motorcycles....... I was at Checker and I saw them and I couldn't believe how small they are. It looks like the vapor line hose diameter is sufficient to either plug into, or onto, a real tiny $5.00 filter like that. If I get to it this weekend, I will put it all together and take a photo.

[allthrottlenobottle]

Thanks jeansguy I'll do some investigating as well. Look forward to the pics.

[book-ends]

Oooffffff.............I just realized that I was looking at FUEL filters!!! I think that I can use one though. Air can still pass through it.

[allthrottlenobottle]

What about an old style air breather? One of those foam types? The kind that sit before an air filter on older induction systems. Might be able to modify it......

[TurboKA37]

i was thinking one of those small filters that people use on some of the holes in their engine that vaccum lines were previously attached. dont know where to buy them tho

[nolaws4evr]

any parts store that sells APC crap is going to have those small filters your talking about. They should be about 10 bucks apeice and come in dif. colors. Ive got 2 that Im using on vaccum lines right now, and thinking of takin the canister off just b/c I live in alabama and have no emissions whatsoever.

[allthrottlenobottle]

I looked at some of the breather elements today at the auto parts store. Not much that would work.

nolaws4evr: I haven't seen any filter smaller than about a 3/8 opening. How big of a fitting is on the filters you have?