If one of them gets a little loosey goosey, it can and will flip over - stopping all fuel from going through. All the fuel going into your engine goes through those valves one faces up, the other down. In the bottom of the primer pump, there are 2 round brown steel things pressed into the aluminum flange. Better yet, get a new one and keep it in a safe place where it won't get bent. Remove the 2 bolts holding the primer pump on its housing, being careful not to tear the gasket. Hopefully you didn't have to be towed in. You change the transfer pump, no improvement. You look for pinched fuel lines, have them blown out, all is well - no blockages. problem goes away but returns when you least expect it. 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.ĬAT motors also have a unique potential problem, unrelated to the fuel tank levels but it will drive you insane trying to figure out if you don't know about it or where to look. 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. Fuel returning from a running engine will flow to where there is less resistance i.e. In addition to the fuel lines, in the top of each tank is a pressure equalizing vent which is probably the culprit. Going down the road, the drivers side tank level is most always lower. NOT! From day 1, your 98 Pete's tanks never had the same fuel levels as long as the engine is running. 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. These smaller lines come from the back of the head on your engine, returning un-burned, warm fuel to your tanks. There is a small fuel line connected to the top of each tank.
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