I have an 05 DC Tundra 4wd. The problem I'm about to describe has only occured about 4 or 5 times so far, but it happened yesterday which is why I'm posting this dilemma. When starting my truck yesterday, it took about five or six seconds to start. The motor was turning over trying to start. Like I said, it's done this just a handful of times since I bought it in Nov 04. The first thing that comes to mind is the automatic fuel leak check. The manual states that you may hear a humming noice several hours after you shut the engine off as the system is checking for fuel leaks, etc. If you try and start it while it is performing this check, will it be somewhat difficult to start? I'm not saying it's impossible, but I really don't think it's bad fuel because it only does it once in a blue moon. My air filter is spotless, etc. Any ideas? Thanks.