I own a 69 bronco that has no fuel gauge. I just clock the miles. I ran out of gas when I first got the vehicle. Besides filling it up, I had to fill the hose between the pump and the carburettor with gas too to get it started. Anyway, yesterday I appeared to run out of gas (way before I should have) and had to do the same thing to start it. When I filled up, it only needed 9 gallons meaning it had 5 gallons in it when it stalled and would start by itself. It seems to be running fine once again. Any suggestions on what's up?