I am new to this board and am looking for answers. I have a 2001 Rio that doesn't want to start after running for a while, or after a gas fillup. I have had the fuel system flushed, replaced the fuel filter and fuel pump. I have also had the TSBs done. I have made sure the gas cap is good and tight. The Check Engine light does not come on. The motor just turns over like it is not getting either spark or fuel. After about 5 minutes it will start and run rough. I turn it off, wait a minute and then it starts just fine. No more problems until it feels like doing it again. Our dealer is starting to scratch his head on this one. Any help would be appreciated.