there is no gas comming from the gas tank

IN TANK PULSATOR IS BAD IF YOU DON'T HAVE GAS FLOW THRU THE SEND SPOUT WHEN YOU JUMP THE FUEL RELAY. SOME FULL ASSMBLIES ARE SOLD WITH THE FLOAT AND PULSATOR( WHICH IS THE SIZE OF A D CELL BATTERY) WHEN THEY BLOW THEY USUALLY ALSO TAKE THE MAIN CHASSIS MOUNTED PUMP WITH THEM , BECAUSE BOTH HAVE TO BE EMERSED IN GAS OR THEY BURN THE GEARS/COMPONANTS.....AGAIN A JUNK YARD MAY BE THE ANSWER OTHER WISE THE PULSATOR UNIT IS ABOUNT 160 TO 230 DOLLARS NEW!