The QR in my 2002 Altima used to flood very easily, don't know if NNA has designed out that issue with any updates to the newer QR's. It would happen almost like clockwork if you started it cold, moved it in the driveway and shut it down. All the Nissan forums used to be peppered with flooding complaints.

I hope its a better motor than it used to be, my wife and I are picking up our CPO 08 SL AWD Premium tonight.