bucket

My fuel vapor line is plugged because my fuel tank does not have the attachment point for the line. The line is now leaking and can be easily fixed. The line has been plugged for over 15 years.

If I have the leak corrected, and unplug the line, I will need to purchase a new fuel tank with the attachment point for the line. My fuel tank is in good shape. So, here are my questions:

1. What is the advantage of having the fuel vapor return line on my 1969 Vette?

2. What problems have Corvette owners without the return line on their Vettes experienced?

cardo0

Vapor return line is actually a recirculation line from the fuel pump back to the tank. This helps prevent vapor lock which used to happen to carburetor equipped cars on hot days. The fuel would boil in the fuel line at hot locations starving the car until it cooled back down.

I use the return line on my '74 but have it connected to the q-jet carb inlet bowl through a 0.040" orifice. This maintains the fuel pressure to the carb very well and prevents vapor lock also.

MelWff

To be specific on a 69 the return line did not connect to the pump. It connected to the fuel filter and I noticed a definite difference, poor idle quality, when the line wasnt used on a hot day.

ToniH

terrys6t8roadster

You don't need a new tank. A port can be added to existing tanks. When changing the induction on the 6t8, at first I installed a # 6 AN port only to find out that was to small. Removed tank again, purged of fumes and installed a #10 AN port. Use a magnet to remove metal particles from inside tank. T

stingr69

Quadrajet equipped vehicles used/needed them from the factory but Holley equipped vehicles did not. Just something to keep in mind.