Datsun Roadster Forum-311s.org

Car died this morning....in a busy intersection....during rush hour....sigh...

Whilst waiting for the tow truck, I think I figured out that the problem is that the fuel pump isn't pumping any fuel. I came to that conclusion because a PO had installed those clear inline fuel filters on both sides of the fuel pump. The inlet one shows fuel; the outlet does not. Of course, that doesn't explain how I got that far, hmmmmm....

Anyway, the outlet hose runs up next the battery, over to the right fender, tied-off near the voltage regulator, then a run around the front of the radiator and back to the inlet pipe by the front carb. I really don't think that's OEM. But wait; there's more! Open the trunk and you get a not-so-faint smell of gas.

Soooooo, I'm thinking a redo of the gas lines is in order. Does anyone have any pics or diagrams of how the fuel lines -SHOULD- be run?

Thanks.

Here is a link to some diagrams of the fuel lines.

http://www.gordon-glasgow.org/Images/11A-1.gif
http://www.gordon-glasgow.org/Images/11A-2.gif

The gas smell in your trunk might be a torn rubber inlet hose just below the trunk floor grommet or the small ventilation hose may have come off at the top of the tank or gas fill inlet tube.
http://www.gordon-glasgow.org/Images/11.gif
The inlet hose usually come up once in a while on Ebay or one of the vendors listed will also have one on hand.


Hope the above helps you.
Ray B.

Pete, I don't think the routing is a problem as I had a similar set-up for years without any troubles. My original fuel pump failed and I replaced it with an electric one, but went back to the mechanical type due to starvation issues at high rpm's. Easy to check by pulling the top of the pump assembly to check the condition of the diaphram. Some pumps are rebuildable and other types are not. If it is bad, I would just replace as these pumps usually last a long time I had the same gas odor, but it was due to my replacing the rubber filler hose (6" or so) with a radiator hose. I measured the ID of the hose and went to NAPA and bought a section (they sell it by the foot) of fuel resistant hose and this eliminated the smell. Good Luck. Phil Herring SRL311-07036 Charlotte NC