General Category > Quadrajet Carb Talk and Tips

Cheaper than plumbing a fuel return line

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Greasy Harley:
I installed a WIX WIX 33040 Fuel Filter with a return line on my truck. I don't know if it needed it but it was easy enough to install and only cost a few bucks.

blazer74:
I’ve used the fuel filter also, up as close to the carb as possible, worked like a charm using the tank vent line as the return and leaving the gas cap loose.
I run mostly non E but want to be able to use 10% also.
Had problems with the vapor lock.
My 74 K5 Blazer did not come with a return. Never had any problems for years then bam there it was.
I added the return, replaced the tank sending unit with one that had  the return port. Used the 3 line fuel pump in place of the filter with the vapor return and didn’t help a bit.
From there I didn’t want the big filter so I added an inline barbed  fitting for an external Fuel pressure gage on the fuel line up near the carb with a 1/4 inch barbed elbow for the return. Installed a .060 restriction in the elbow like the Wix filter does.
Worked like a charm. Never a problem since.

Craig

Glutenfreecarbs:
Thank you guys for the part numbers and testimonials. I was thinking of converting an old tank vent line to a fuel return line as well. I've just been putting this off because I'm a bit neurotic about fuel safety, and want to be sure it's implemented properly...i.e. next winter when I have time to bend and flare some steel tubing.

Cliff Ruggles:
I prefer and use a return on all older vehicles I've owned that were carbureted.  I know they tell us that most of these electric and mechanical pumps will work fine ran "dead-head", but it's just easier on the pumps to supply an alternate path for fuel flow.  If nothing else it takes some load off the pump and with electric pumps for sure they will run quieter and the brushes will last longer.........

blazer74:
Just remember if you use the existing vent line you have to vent the tank with a free flowing vented fuel  cap or the tank will pressurize from the fuel returning to the tank .

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