Re: [Chevelle-list] What's behind the back seat?

[Bill Vander Werf]

It's part of the emission control system. The gas tank and carburetor venting were all connected together through a system of vent hoses and a charcoal canister up by the driver side fender well and the mystery canister behind the back seat. These cars were some of the first to have closed fuel system venting. I believe 1971 was the first year. Before that all tanks and carburetors were simply vented to the atmosphere.   All the vent hoses from the gas tank and a hose from the charcoal canister up front converge at the mystery canister. My guess is that since it is mounted higher than the gas tank the vapors, theoretically, would collect in the canister and then be drawn back to the carburetor by a vacuum hose connected to the charcoal canister up front when the engine was running. How well it really worked I don't know.   Bill Vander Werf     ----- Original Message ----- From: Jimmy C. To: The Chevelle Mailing List Sent: Sunday, May 14, 2006 6:41 PM Subject: Re: [Chevelle-list] What's behind the back seat? Pelle, I have a 72 and I was told it was a vent for the gas tank.  Jimmy C ----- Original Message ----- From: Pelle Andersson To: The Chevelle Mailing List Sent: Sunday, May 14, 2006 12:46 AM Subject: Re: [Chevelle-list] What's behind the back seat? But if the tube is oval? Isn't it a tube anymore then? (Maybe it's a language problem here? I'm Swedish)   Best regard Pelle ----- Original Message ----- From: [EMAIL PROTECTED] To: Chevelle-list@chevelles.net Sent: Friday, May 12, 2006 3:22 AM Subject: Re: [Chevelle-list] What's behind the back seat? Im confused....Maybe Im wrong, but a basic tube cant have more than two dimensions....Diameter and length right??? Any identification on it???