Then your problem looks like no fuel in Carburetor fuel bowl.
Bhai i have read somewhere on PW i guess. That fuel pump turns on for about 4-5 seconds when ignition key is in run position after that when the car is started then it takes the signal from Alternator. Fuel pump will keep running till the Alternator is spinning as soon as it stops spinning fuel pump will also stop. Although I don't know how true this statement is.
I have doubts on fuel pump working / wiring....
Loose butterfly cannot cause such problem.