Little confussed Dan. The hard steel fuel line (5/16th inch ID for a SBC asnd 3/8th inch ID for a BBC) terminates at the front lower A-arm at an opening in the sub-frame. From there it connected to the fuel pump via a six inch rubber fuel line (Neoprene) at the inlet of the mechanical fuel pump (BBC with a Quadrajet had a return line). The fuel pump output was once again a steel hard line that snaked up inside the water pump to a glass fuel filter or directly into the carb inlet depending upon the engine application.

Big Dave

 

Greetings from Arizona
???? Do you have two lines coming from tank, possible could be fuel /vapor return line if car is Calif emissions? got pictures?
Jay

 

1/4" return lines for sbc

 

That sounds like the return line off the pump!...

 

:yes:

 

Guys I dont have a picture right now but I have two hard steel line that run from
the tank and stop at the front near the fuel pump. One line connects to the fuel pump
the other is not connected to anything right now. My car is a K-code 350 4barrel.

I have a tank beside the radiator for vacume/condeinsor i believe? Should this line be ran to that tank? Maybe it should go to the fuel pump?

 

It sounds like a car equipped with EEC. Those vehicles had two lines that come out of the fuel tank. One goes to the fuel pump and the other goes to a cannister in the engine compartment. If you want to get rid of that extra outlet, then get a 1970 take that does not have EEC.

 

What is the cannister for and what is EEC?

thanks,
Danny

 

It was for the smog laws from the 70's in California. EEC was something like exhaust emmissions control or something like that.

 

They had it from 1970-1972.

 

So my car is a california car?
Do all 1972 novas have this cannister? I will run the line back to the cannister,
wonder if they ever wear out?

 

California vehicles have them, it's a charcoal canister!..

 

Its not just a Calf. thing. From what I understand it started in 71 and up
had the EEC as it was for a National emissions thing and it was one of
those things that helped sucked the power out of the engines. A smog
pump system is the Calf. only unit.

Chuck

Great explanation huh?:sad:

 

But it started in California and like anything else other states follow, but the canister did go federal, but all it does is collect vapors don't effect power, smog pump that's another story!..

 

EEC = Evaporative Emmision Control. It stored the gas fumes from the gas tank in an activated charcoal filled canister that was sucked into the car's intake as you cranked the car (enrichening the mixture just like a choke, and it kept you from dying from cancer at the same time). It also means you have a non-vented gas cap as well, if you have EEC installed, as that was the purpose of collecting the gas fumes. Which wouldn't work if there was hole in the tank (a vent) to let the fumes escape.

Big Dave

 

EEC = Evaporative Emission Control

 

1970 model year cars sold within the state of California were required to have EEC
1971 all cars sold in the US equipped with EEC

http://www.epa.gov/oms/invntory/overview/solutions/milestones.htm

 

Your fuel pump should have a in and out,the out is the return line that goes back to the tank.Your charcoal canister also has a single line that goes back to the tank.By 1972, all Novas had this system and other cars also.If your fuel pump don't have a return on it,then it must have been replaced at one time with a incorrect pump.