A float carburetor has a contained area called a bowl that holds fuel. The float shuts off fuel into the bowl to stop it from overflowing, then allows more fuel in as the carburetor needs it. This is a low pressure fuel system, many of which have fuel pumps running from the engines power rather than more modern electric pumps.
It is in the float chamber of the carburetor.
The float is located inside the carburetor.
Have you checked to see if the float has a hole in it allowing fuel to weight it down? Possibly the needle valve is sticking and not the float. Could also be the float needs adjusting. You need to open the carburetor up and see what is going on.
Almost All engines with a carburetor have a float valve. The exception is a carburetor Built by Tillotson, horrible things but they worked upside down.
A bad, stuck or dirty float needle inside the carburetor.
Float may be sticking or have a hole in it.
98 Dodge van does not have a carburetor-it has a throttle body= no float
float valve or float are bad
What if your float is not floating? Food for thought... If your float has gone bad then it wil not give enough force to close the Float Valve. Get a new float. If this does not fix it then the float valve you got is defective.
The float bowl and the venturi tube
The needle and seat.
Usually a stuck float mechanism.