my pickup cranks up then dies. some days it will crank up and idle but not good then others I got to pump the gas. ive replaced the tank, filter, cleaned the carb still does the same thing I need some help. I really need to get this thing back on the road

 

If it will run when you put the gas to it, it is the carb or in the carb. Choke, float, vacuum leak. Big leak.