I had my 1989 S-Cargo running like a top. I had recently rebuilt the carb, adjusted timing and idle mixture and everything was great. I parked it and the next week, went out to start it and it wouldn't idle without constant working of the gas pedal and stalled out anytime I didn't keep giving the pedal a pump. It drives but as soon as I come to a stop, it stalls out. Any suggestions as to where to look? It seems like some kind of fuel related issue but it was just running perfectly a week before. Can a bad fuel pump cause this? I would think if the fuel pump were bad, it wouldn't drive ok. This car is built on a Sentra platform with an E15 engine. Slightly different carb (E15S). I have replaced many vacuum hoses so I don't think there are any vacuum leaks within the hoses. Between the hoses and relays on this thing, it's hard to know where to look for a problem. All suggestions welcome.