I replace leakin fuel hose and than when i went go start my truck it wasnt get not fuel . I change the pump, the filter, the tank all new fuel hose and it still want start. i put fuel and the carb and blew air into the return line. nothing clogged. all those things and it still want start. any advice i dont know what else to do or is it something special that i have to do. it not a eletric fuel pump.