I installed a poly gas tank in my '78 and can't get fuel to the carb. The glass window has no gas showing. The fuel pump is new. The fuel filter is fairly recent. When some gas is put into the carb it runs but just for a few seconds. There are about 2 gallons if fuel in the tank and the gauge shows the fuel level is adequate. I have tried with the choke out all the way. I have pumped the pedal and no fuel squirts into the carb body. Any suggestions are welcome. I need to get this fixed and get the FJ out of my garage.