well make sure you have all the lines hooked up right. The first tank tank should go to the carb from the regular nipple. The pressure nipple on the first tank should be getting fuel from the second tank so put a fuel line from the first tanks pressure nipple to the 2nd tanks fuel nipple. Then from the exhaust put the fuel line from the 2nd tanks pressure nipple to the exhaust. That should work for your and make sure to add some fuel filters in there cuz i heard it helps pressurize the system to keep it a steady flow.