hello everyone I'm new to this forum and have a question about my 2008 G35x. Sometimes when I turn on my car it will shut off I took it to autozone so they can run the computer on it and they said the battery starter and alternator are perfectly fine does anyone know what else it can be? Thanks for your time.

Did they pull any other codes from your vehicle? Is your MIL (check engine light) on?

How often does this happen? Does it happen when the engine/weather is cold?

Could be a multitude of things...One being an issue I've recently dealt with...a dirty/malfunctioning Mass Air Flow Sensor. Any additional info will help us to diagnose potential problems.