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Is this my fuel tank vent hose?


mbaze

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In the pic below, I've got two hoses coming out of the firewall side-by-side. The top one's the fuel line. Is the other one the fuel tank vent hose that used to go into a charcoal cannister? If so, shouldn't it be UN-plugged, not plugged with a bolt as it is now?

post-14328-13667596304504_thumb.jpg

'71 Sahara (sold 2019)

'74 '02 (sold 1/09)

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  • 3 years later...

ran a quick search, and I am wondering the same thing. Is this the fuel tank vent tube? where SHOULD it be attached? To the air filter to burn any fumes?

1970 Agave work in progress

Born on May 14 1970 and delivered May 19th 1970 to NYC to Hoffman Motor Corp. Agave code 071

new guy

help appreciated!

other cars: 1991 318is / 1999 540iT

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That appears to be the fuel tank return line that was used in conjunction with the EVAP system when the cars were smogged. I'm assuming you both have a weber 32/36?

1974 Malaga 2002 4282899 "Little Red"

1976 Polaris 2002 2374061 "Rusty Shackleford" 

1998 Dk. Blue Volvo S70 T5 "Carlene"- 221k Miles 

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yes, 32/36 - so this can go away? or route to somewhere? mine is just hanging around, not plugged - no ill effects, and I don't smell gas (at least not any more than usual!)

1970 Agave work in progress

Born on May 14 1970 and delivered May 19th 1970 to NYC to Hoffman Motor Corp. Agave code 071

new guy

help appreciated!

other cars: 1991 318is / 1999 540iT

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yes, I have the plastic evap canister in the trunk. '70 model. I think I will just route to air filter box as noted above. Thanks

1970 Agave work in progress

Born on May 14 1970 and delivered May 19th 1970 to NYC to Hoffman Motor Corp. Agave code 071

new guy

help appreciated!

other cars: 1991 318is / 1999 540iT

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2 hoses to route to the K&N now (valve cover vent tube and fuel tank vent tube)

1970 Agave work in progress

Born on May 14 1970 and delivered May 19th 1970 to NYC to Hoffman Motor Corp. Agave code 071

new guy

help appreciated!

other cars: 1991 318is / 1999 540iT

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  • 4 months later...

Get rid of the KNN also... The stock air cleaner provides resonance qualities that a KNN cannot replicate. In essence the stock air cleaner is able to pulse the flow of air into the intake thereby providing a little extra power that you will lose with the KNN. That is why the cleaner is so large and oddly shaped- those engineers thought of everything!

74 tii
"I know just enough to be dangerous"

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Do you really want to create vacuum in your gas tank by attaching it to the air cleaner? If the tank is full and you are driving like the car should be driven, could you not potentially pull gas into the air cleaner? I vented mine to atmosphere out of the trunk.

Mike

76 Malaga (Molly)

Mods:

Weber

Recaro

Eibach

Bilstein

Panasport

Ansi

Parker

Ireland Eng.

'72 Tii Project

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