charcoal canister

dzx · Post by **dzx** » Wed Mar 30, 2005 9:38 pm

will any charcoal canister from a subaru work on my legacy ss? I noticed some had 4 holes on the top and my old one only had three.

Matt Monson · Post by **Matt Monson** » Thu Mar 31, 2005 12:57 am

I've got one with 3 you can pick up when you get the mounts. Or just cap the 4th hole...

dzx · Post by **dzx** » Thu Mar 31, 2005 1:46 am

Thanks, a friend picked up one from the junkyard with the 4th hole capped by the factory.

THAWA · Post by **THAWA** » Thu Mar 31, 2005 2:15 am

4 holes?

dzx · Post by **dzx** » Thu Mar 31, 2005 7:21 am

yeh its got two regular holes then where the third one is a disc with two lines coming out of it. I guess all the subaru's at the junkyard had these ones with the 4 holes.

tris91ricer · Post by **tris91ricer** » Thu Mar 31, 2005 5:42 pm

Can you get new canisters from the JY?
dzx, did your car make a sort of 'knocking' noise that resonated into the interior, like perhaps a phone or a pager was vibrating rather harshly inside your glovebox? I was told that sound (which is going on in my car) was from the EGR, which, if I assume correctly is associated with the charcoal canister, right?
Any Ideas?

THAWA · Post by **THAWA** » Thu Mar 31, 2005 7:23 pm

We dont have an EGR system.

dzx · Post by **dzx** » Fri Apr 01, 2005 5:37 am

I wasn't running a charcoal cannister for a long time I broke it when installing my front mount but never had that vibration you talk of.

93forestpearl · Post by **93forestpearl** » Fri Apr 01, 2005 9:38 am

So is it ok running without it? Are there any side effects on the pcv system? Up here in Minnesota they don't check on stuff like that. If it made IC pluming easier I think I could live without it.

dzx · Post by **dzx** » Fri Apr 01, 2005 9:43 am

I was just going to move the cannister but since it was broken i just left it off and let the lines dangle. I didn't notice any change but there could have been.

free5ty1e · Post by **free5ty1e** » Fri Apr 01, 2005 2:08 pm

umm... isn't it kinda important to have the charcoal canister to process the gas fumes from the tank? This has something to do also with, when filling your gas tank, why you should NOT top it off after the auto-shut off (splash detector) has stopped your pump.

Something 'bout loud 'splosions. Go boom. I'll ask my friend, he seems to know something about it as he's the one that warned me. But I think thats a good piece to have functioning properly in our type of fuel system...

Yes it is in the way for FMIC piping, but not if you lengthen the hoses and move it to the other side, which is what we had to do.

dzx · Post by **dzx** » Fri Apr 01, 2005 2:24 pm

No, its for evaporative emissions. the charcoal absorbs the fuel vapor from the tank then when the ecu tells it to opens a valve and burns the vapors in the engine. It's supposed to ever so slightly increase the efficiency and decrease air pollution.

It really doesnt have any noticeable side effects, it doesnt make your car smell bad or decrease your gas mileage. It is illegal to remove but how many of us are running catless exhausts too?

tris91ricer · Post by **tris91ricer** » Fri Apr 01, 2005 7:18 pm

Righto. Taking it out today, then. Looks like I'll have time this evening, anyhow. w00t!

vrg3 · Post by **vrg3** » Tue Apr 05, 2005 7:03 pm

EJ22 and EJ22Ts use different charcoal canisters. The non-turbos only have two fittings on top and the turbos have three. That's because the turbos have an auxiliary purge system that operates when on boost.

You can use a non-turbo canister if you remove the auxiliary purge valve and cap off the other fitting(s). To be safe, it's probably best to also put a check valve in the purge hose. That's what I did.

dzx · Post by **dzx** » Tue Apr 05, 2005 10:15 pm

Doesn't it already have a check valve on the line that goes from the resonator to the canister?

vrg3 · Post by **vrg3** » Wed Apr 06, 2005 12:13 am

That's the auxiliary purge valve. Non-turbo canisters won't have a fitting for it.

dzx · Post by **dzx** » Wed Apr 06, 2005 4:55 am

The canister i have now has four fittings on the top and the drain on the bottom with one of the top fittings capped off.

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charcoal canister

charcoal canister