 Fuel tank questions...do I need these?, Charcoal cannister and expansion tank |
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| jcambo7 |
 May 12 2009, 10:22 AM
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#1
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Senior Member  Group: Members Posts: 1,664 Joined: 24-December 08 From: Graham, WA Member No.: 9,867 Region Association: Pacific Northwest  |
I have a 73 2.0 FI engine and I am wondering if I need the expansion take and/or charcoal cannister? If I can remove these than what do I do about the openings in my air intake for the charcoal cannister? And can someone please explain the purpose and what the charcoal cannister actually does please?
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| type47 |
May 12 2009, 11:03 AM
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#2
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
"yes" that is, the car was supplied with these items from the factory but the car can work without them. The charcoal canister is for emissions purposes. The vapor fumes from the gas are fed thru the charcoal and sucked into the intake air by the hose routing to the air filter housing. The hoses are routed along the drivers side rocker panel and enter the engine compartment below the relay board. If you don't use the expansion chamber it seems to me that you've created a greater problem to solve as to how to close up the top of the tank and how to make a filler.
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| jcambo7 |
May 12 2009, 11:27 AM
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#3
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Senior Member Group: Members Posts: 1,664 Joined: 24-December 08 From: Graham, WA Member No.: 9,867 Region Association: Pacific Northwest |
So I can take the cannister off and not have a problem at all...but than what do I do about the openings for the charcoal cannisters hoses that connect to the air intake?
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| SirAndy |
May 12 2009, 11:33 AM
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#4
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Resident German Group: Admin Posts: 41,669 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(jcambo7 @ May 12 2009, 10:27 AM)  So I can take the cannister off and not have a problem at all...but than what do I do about the openings for the charcoal cannisters hoses that connect to the air intake? You can. But you will have fuel smell inside the car every time you have more than a 3/4 tank of gas. - Plug the connection on the air filter and the one on the side of the fan housing. - Remove the lines behind the rocker. - Remove the charcoal canister. - Remove the expansion tank. - Route the small hose that goes to the expansion tank inside the large plastic overflow hose that goes from the filler neck down and outside the bottom of the car. - Get used to the smell of gas. (IMG:style_emoticons/default/bye1.gif) Andy |
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| jcambo7 |
May 12 2009, 11:45 AM
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#5
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Senior Member Group: Members Posts: 1,664 Joined: 24-December 08 From: Graham, WA Member No.: 9,867 Region Association: Pacific Northwest |
QUOTE(SirAndy @ May 12 2009, 12:33 PM) QUOTE(jcambo7 @ May 12 2009, 10:27 AM) So I can take the cannister off and not have a problem at all...but than what do I do about the openings for the charcoal cannisters hoses that connect to the air intake? You can. But you will have fuel smell inside the car every time you have more than a 3/4 tank of gas. - Plug the connection on the air filter and the one on the side of the fan housing. - Remove the lines behind the rocker. - Remove the charcoal canister. - Remove the expansion tank. - Route the small hose that goes to the expansion tank inside the large plastic overflow hose that goes from the filler neck down and outside the bottom of the car. - Get used to the smell of gas. (IMG:style_emoticons/default/bye1.gif) Andy Thanks Andy Looks like I will just leave the cannister and expansion tank alone than... (IMG:style_emoticons/default/biggrin.gif) |
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| thompson-mfr |
May 12 2009, 11:56 AM
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#6
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Thompson, Ryan Group: Members Posts: 198 Joined: 30-September 08 From: Silverton, OR Member No.: 9,598 Region Association: Pacific Northwest |
It is optimal to keep them on your car. The charcoal canister is designed to take away the fuel smell as the hose that lead to it come from the fuel tank then route under on the side of the car to the motor; further venting the fumes. The expansion tank takes any fuel sloshing and some fumes in as well (too my understanding not an expert what I have heard)
I wish mine had that system still. The PO took all of it off. Don't know why. All that original fuel line routed under on the side of car is not cheap. Why do you want to remove them? |
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| SLITS |
May 12 2009, 12:05 PM
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#7
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
You don't have fuel lines running on the driver's side of your car. They are merely plastic lines to carry air to the charcoal canister from to the blower housing and carry air/fumes back to the air cleaner.
Your fuel lines run thru the center tunnel and are an entirely different diameter and type of plastic. |
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| jmill |
May 12 2009, 12:30 PM
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#8
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
After 30+ years I would think the charcoal is toast. With any charcoal filter they usually have a service life. A charcoal respirator will even get used up sitting open to the air. Anyone know how long they last and if you can get a replacement or refill?
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| SirAndy |
May 12 2009, 12:36 PM
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#9
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Resident German Group: Admin Posts: 41,669 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(jmill @ May 12 2009, 11:30 AM) After 30+ years I would think the charcoal is toast. With any charcoal filter they usually have a service life. A charcoal respirator will even get used up sitting open to the air. Anyone know how long they last and if you can get a replacement or refill? Do a search (I'm too lazy right now). I believe Jeff Bowlsby looked into getting his canister refilled. He also has a service bulletin with the service interval, i don't remember but i think it was around 30k miles. (IMG:style_emoticons/default/idea.gif) Andy |
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