installed the new fuel tank and fuel pump. now the pump runs constantly. at first i searched for reasons that it could do this, such as the regulator failure. after further snooping around there is a hiss under the upper intake that sounds like air, key on engine off, no fuel to be seen around that area. there is a "bleeder" on the fuel rail that i checked and there is fuel to the rail. pulled front drivers side spark plug and it was dry. so fuel to the rail but not thru the injectors??? plan on pulling the top of the engine soon and pulling the rail, any other suggestions?