carb

[Dirtkid93]

I just purchased a new Rochester 1 barrel carb since my old one was leaking everywhere. I bolt it all up and drive the truck about 50 miles, I smell a burning and pop the hood to find out it's leaking through the float bowl gasket, tightened the bolts on it, fixed the problem. another 5 miles later, it's running just fine, doing 50 down the road and all of a sudden it starts sputtering like there is no gas getting to it, tank is full, fuel pump is doing it job, gas line is pressurized from the pump like it should be. so why is it doing this? do I have an air leak? I know I have a vacuum leak but I repaired that and it didn't fix the problem. can someone shed light on this?