Gas tank fuel lines leaking at tank - 2000 Harley Davidson FLHRCI Road King Classic

Yes you should be able to replace the rubber tank seal that the fuel line goes through. Be sure to replace the fuel line(s) when you do.

Use compression barb fittings on the pressure side with fuel injection line NOT REGULAR FUEL HOSE THE REGULAR HOSE WONT HOLD UP TO THE PRESSURE. The return line can be regular fuel line because of the low pressure.

sounds like sending unit gasket is leaking. drop the gas tank...sorry

This is usually because you used a fuel line that is too small to seal the holes they pass through in the fuel tank. When they pass through the holes in the tank they should be very tight so gas cannot leak past the lines.

The holes in these gas tank are made to fit available fuel lines tightly enough to prevent the problems you are having. If yours is leaking either someone put on too small a fuel line or made the hole larger so it would be easier to put the fuel line in the tank. The only fix is to get the next size larger fuel line or replace the tank. You can try to seal the line with RTV or silicone but he gas will degrade it and it will leak again plus you'll have a harder time the next time the line has to be replaced.

More than likely you have a busted fuel line, or one of the connections from the fuel lines to the fuel pump is broken. If you know how to repair cars, drop the tank and find the leak. If you don't know how, have the vehicle towed to a shop. Driving the car would definitely be a fire hazard.

you need to locate leak quickly and fix.this is a fire hazard look under hood check for gas leaks around fuel pressure regulator.and fuel lines going to fuel injectors.also go to rear of car under where gas tank located and check fuel lines around fuel tank and fuel filter for leaks.

Sounds like the fuel pump. Its located inside the fuel tank so it would make sense that it only leaks when the truck is running. Hope this answers your question. Best of luck.
Greg

sounds like you are going to have to drop the tank out to inspect and fix. with luck it will be leaking from the fuel pump seal or the return line.
Bad luck would be if the tank is rusted out and needs to be replaced.
Syphon as much gas out of the tank as you can before you drop it , gas is heavy.

First off, what kind of vehicle do you have? I assume it is one that has an electric fuel pump in the gas tank, so that is what my answer will be geared to.
On the gas tank there are several lines. The most important ones for this conversation are the ones that deliver fuel to the engine and the one that returns the excess fuel back to the tank. They are usually different in size.
The larger one delivers the fuel and the smaller one returns the excess fuel back to the tank. Either one may be the culprit in this scenero.The tank is usually connected by a high pressure flexible fuel line to a stainless fuel line resembeling a brake line. At times this flex line may develope a leak for varrious reasons. It could be something rubbing against the line, it could be the crimped connection went bad and is leaking, etc. If it is your flex line, which it probably is there is a repair kit you can purchase to fix it. I have only been able to find this repair kit at NAPA. I've tried many auto parts stores and they are the only ones that carry it. The use of it is very simple actually. You find the leak in your line, which by the way is harder than it sounds and usually involves removing the gas tank. In which case you will need a special tool to disasemble the gas line from the tank. Once the leak is located you cut the line. You then have to place the remaining flex hose in boiling hot water for at least 10 seconds, which makes it soft and insert a splice fiting into it. When the line cools, it will shrink tight on the connector. You the do the same with the hose that came with the repair kit. Then do the same with the other end and install the fitting which connects to the gas tank. You should now be in business.
BTW. I have to do this very thing tomorrow.
Good Luck! and let me know if this helps you.