I was determined to let the car run out of gas since I have no idea how much is actually in there. I started it and let it idle in the driveway for about two hours. It started to stumble so I thought it was empty. However, when i opened the gas cap some sort of pressurization has taken place and forced gas up the filler neck. I had changed the charcoal canister and blown through all of the lines to and from. I just cant understand why it would send gas out of the filler neck and then starve for fuel. I took a large pipe and blew into the filler neck and it forced the gas back down and must have expelled the air somewhere. It started right back up and ran for another hour before I gave up and shut it off, I know others have had problems with this fuel tank setup. Wont someone please chime in.