Changed fuel pump due to sputtering and it will not idle now. Car is new to me and has sat for a year. When I got it it needed to have someone put their hands over the 40IDF carb to start it. Once it warmed up it ran but sputtered. Changed fuel lines and fuel filter and carb has been rebuilt. Fuel is flowing in the filter and I can keep it running if I rev the throttle. As soon as I let it idle it dies. Any suggestions.