I have a Chevy Kodiak dump truck that I am trying to fix.

Pictures of the truck and carburetor are he

http://igor.chudov.com/tmp/Chevy-Kodiak/

Supposedly, and I believe the person who told me the story because I
know him very well, a pump gasoline inside the gas tank went bad on
it. A while ago, tank was disconnected and we put it back when we got
the truck.

Truck sat outside for 2 years without any further work.

We bought a new pump from NAPA.

The truck cranks, but would not start without fuel added to carb.

If I remove the nut holding the line near the carb, then gas pours out
of it when the pump in the gas tank is activated. So, gas gets to the
carburetor.

If I pour gasoline in the carburetor, the engine starts great. It
also runs great when the engine runs and I continuously add a small
stream of gas to the carb.

However, without that stream, it does not get any gas.

There are two electric valves in the carb. If my guy cranks the motor
and presses the gas pedal, I see some drops of gasoline, but not
nearly enough for this Chevy 454 engine.

Any ideas what could be wrong? Carb cleanout and rebuild necessary?

thanks

i