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In my 71 super there is a hose that comes off the top corner of the gas tank, goes through a large plastic tube which has a U-type hose at the bottom (comes out of the bottom, goes back into the bottom) then another hose from the top which goes off into the chassis. The plastic tube is about 18" to 24" long. Is this the start of my fuel line that I though would come out of the bottom or is it some sort of emmissions thingy? It's always full of gas. The manuals I've downloaded don't mention it. Can it be safely bypassed? Here's some pics:

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Never mind the wiring, I'm working on it. Someone wired the fusebox completely upsidedown among other things. Have it about 75% sorted out and will clean it up when done.

Scott H · Accepted Answer

It's an emissions thingy.  :-)The plastic tube is an expansion chamber that is part of the fuel vaporrecovery system that routes vapors back to the engine to be burned insteadof released to the atmosphere.An explanation and diagram of the system is here: plastic tube should actually be located under the cowl, above the wipermotor. Being full of gas all the time doesn't sound good to me. :-)See the pictures here, it's item 1: 24 here: can be bypassed/removed, so long as you provide another means for thetank to vent.hth

Mark · Answer

Man, not even close to what's under there now.  Think I'll finish whateverthe previous owner was thinking and just bypass it.  Somebody really did achop job on the wires and hoses in this.  Think I'll re-inspect the brakelines just to be sure.

Gary Tateosian · Answer

...thats for sure...I think I'd either junk it cause its a superanyways   or consider buying a new wiring harness....Gareth

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