Egr and Charcoal canister question.

[El Cuervo]

Hi I have some question about the egr and charcoal canister.
It seens like there is some vacum lines that connect to the charcoal canister and the egr. I'm looking into deleting the egr and some of the vacum lines. This can help eliminate some of the common vacum leaks and clean up the enigne bay a bit. It will also allow me to go SD in the future.
My question is: Can I delete the EGR and still have a fully functional Charcoal canister?? I just hate the idea of having an open hose/line thats directly connected to the fuel tank. I have the charcoal canister connected to the intake pipe like stock. Isn't there a valve on the charcoal canister or on the lines that opens and closes via pressure or vacum on the egr, thus releasing gases to the intake? This is whats stoping me from deleting my egr and vacum lines.
Again, I would love to get rid of all this junk but still retain a fully functional charcoal canister.

thanks
jorge.

 

[9!'clipseDOHC]

Very good points DIRQUIN.

 

[Hubbard 0]

Interesting thread. I know I yanked all that stuff out awhile ago, but I can't remember if I blocked off that line or not. I do know that I get a good amount of pressure build up that gets released when I open the gas cap.

 

[9!'clipseDOHC]

Interesting thread. I know I yanked all that stuff out awhile ago, but I can't remember if I blocked off that line or not. I do know that I get a good amount of pressure build up that gets released when I open the gas cap.

Then you most likely plugged it. There was a thread on here with instructions saying to plug it and others saying not to.

 

[jrohner]

I plugged mine, and have had no issues at all. It doesn't seem to have excess pressure or vacuum in the tank.

 

[El Cuervo]

In all honestly, I would love to keep my charcoal canister. I don't like having an engine bay that smells like gasoline. Because in order to have the canister to function like it should, you need to have it connected to those 2 vacume lines on the TB and to the solenoid that sits next ot the fpr solenoid.
But then, getting rid of all these vacume lines can eliminate potential vacume leaks in the future. Because of this, I was trying to find a way on how to properly delete a NOW non eficiently working charcoal canister without the ill effects of venting the hard line to the atmosphere or plugging the line. So the only thing that came to mind was to place a check valve right after the hard line coming from the fuel tank. Followed by a catchcan and an inline fuel filter. Then connecte it to the intake snorkel. This way you wouldn't be venting to the atmosphere.
So if this is a bad idea, then whats a better one? Lets say that you are going with an aftermarket TB that doesn't have any vacume ports or that you just want or need to delete your vacume hoses. What do you do now in order to keep a properly vented fuel tank without having an egine bay smelling like a gasoline station???

 

[9!'clipseDOHC]

Well the check valve and inline filter both sound good in theory. It's just that hooking it up to the intake pipe would pull a vacuum on the tank. So what if you installed the check valve and inline filter then then routed it down under the car?

Or instead of having it travel up to the engine bay, when it leaves the tank, just send it up along the filler neck and have it vent by the gas cap with a check valve and filter installed inline. That way it could vent by the gas cap, behind the door, and you wouldn't smell anything.

 

[Alex Bland]

Its just pressure from the tank comeing out so theres going to be a slight smell. if you want get a hose clamp and a rubber hose and run the line somewhere that u want the vapors to go. mines open right now...i dont like it but its gunna stay like that for a bit

 

[El Cuervo]

True. But its not just about having a smelly enigne bay. Its about not having your car smell like gasoline all the time. You can always febreeze it . j/k.
If I were to just vent it to the atmosphere, then whats the purpose of having a check valve and an inline filter? I mean, its going to vent to the atmosphere anyways. So why bother with it?? right??
Yeah, I guess my idea only works in theory. But it does seem like the turbo would be creating a strong enough vacume to pull gasoline out of the fuel tank. Hmmm.... or will it?? If so, wouldn't the same apply to the charcoal canister when its open and purgin the fuel tank to the intake snorkel??

Yeah I guess wasn't thinking about the hole vacume pulling gasoline. I was only thinking about vapors and such. Well at least I tried coming up with a solution to this ordeal. You guys burst my bubble.
But in all seriousness now. It seems like the best Idea for now would be a check valve right after the hard vent line from the fuel tank. This will at least hold pressure for about 1 psi or 2in/hg. Then it would open and release fumes and such to the catchcan and into the filter. Though I doub that it will do anything. The fiter in combination with a catchcan and slight delay of the check valve might slightly reduce gasoline scent when vented to the atmosphere.
I did wanted to find a way of re-routing this stuff. I'm going to have to find another way. But in the meantime I think this would be the best thing to do other than keeping the charcoal canister.
What do you guys think?? Any other thoughts??

 

[killerwhale]

How Do Vented Gas Caps Work? | eHow.com

Enjoy

 

[TenSecondSTi]

You mean a 1 way check valve that opens when the pressure in the tank is high enough. That gas then goes into the canister which is routed in with the emissions setup.

You can't just block it off but you can route the line back underneith your car of plumb it into your intake somehow.

Theres only a vaccum in the gas tank shouldn't be any pressure. It comes from the fuel pump sucking the gas out of the tank. The fuel pump sucks it doesn't blow

Best bet would be to route it into the intake pipe threw a very small barb or to your AOS (catch can). you won't get anything but it will kill the raw fuel smell.

 

[LiquidX]

Increased pressure would occur from fuel evaporating allowing a build up of vapors in the tank. The vapors go throuh the check valve and then into the canister. The canister is from factory routed back to the intake.

 

[rommel rojasgsx]

Im glad i saw this. couse a while back i read a tech article on how to remove the canister. well on the article it says to just block the line going to the tank.guess someone should tell that user is not such a good idea to plug it