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Message:: [QUOTE="Ovalhead4Life, post: 2358631, member: 78518"]There is a small fuel line connected to the top of each tank. These smaller lines come from the back of the head on your engine, returning un-burned, warm fuel to your tanks. Both lines are connected with a T fitting, ideally fuel flows to and from evenly for both tanks, levels stay the same, and they found a cure for cancer. NOT! From day 1, your 98 Pete's tanks never had the same fuel levels as long as the engine is running. Going down the road, the drivers side tank level is most always lower. In addition to the fuel lines, in the top of each tank is a pressure equalizing vent which is probably the culprit. Fuel returning from a running engine will flow to where there is less resistance; i.e. lower air pressure in one side vs. the other would see all the returning fuel go to the side where the vent is working properly, while the side with the plugged up or stuck vent has a "bubble." Clean or replace both vents, thus allowing the atmospheric pressure on top of the fuel inside the tanks to be close to even. If that does not resolve the issue, you have a blockage in a fuel line or fitting; it happens! Good luck, I hope that helps.[/QUOTE]