Fuel Return Hose

[georgeramos]

My new carb doesnt have the return line so the hose is just sitting there. Well today i filled the tank and the guy really filled it, 9.53 gallons or something (yes it was quite low but thats another story)

Anyhow on returning to my shop I smelled fuel and noticed it is coming out of the return hose. Is there a valve that should be keeping that from happening? Could that have been bypassed while filling the tank (perhaps overfilling it?)

I plan to remove the hose and just put a rubber cap on the hard line, is that what others have done?

thanks

[giuliot60]

I believe you have an earlier car (is it a '71) so I don't know how it's set up, but my 81 is supposed to have a 2 way valve. I think it's located by the rear axle. But my car also has a fuel vapor charcoal canister the sits in the engine compartment and has a small tube that sucks the vapor into the intake manifold, and I'm in the process of bringing the fuel and vapor lines back up to par.

Here is a diagram someone from mirafiori.com sent me:



"The check valve is a functioning pressure relief valve that sits in the vent line coming out of the three-in-one and running to the carbon canister. It is physically located under the trunk floor in the vicinity of the rear axle on late Spiders. There is a picture of the valve itself below. I've also attached a diagram of the fuel system from the 1981 owners manual. This valve is labeled #5 in the system. It's called two-way because it limits venting coming out of the tank when the engine is not running but also limits air coming in. The later is important because air coming in is what brings most moisture into the fuel system."



Hope this helps.

[donerehart]

Does anyone know if this will work for a 76 replacing broken vapor unit mounted in tire well?

[stpher]

Sorry to cut in on this thread but does anyone have one of these one way valves in decent shape. Mine is all corroded through. I found a check valve at the local auto store but don't really like it.

Let me know

Mine is an 81 FI

Thanks Rick