Exactly the same problem on my '06 FX35, too. I have about 45,000 miles.
Here's what my car does:
YouTube - FX Ignition Problem
The symptoms are the same. Only happens when it's cold outside. Replaced my battery last year and the car was fine over the summer and once it got colder, it started doing that again. Is there any way we can file a complaint or something to Nissan/Infiniti so they'll start a recall on this issue? (The video was taken when it was warmer. Now that it's colder, the car won't fire up even after 2-3 tries)
It's the worst feeling to be driving around a car that costs as much as other luxury cars but won't even start properly. It's so embarrassing when you're in a public parking lot and ppl see your fx not wanting to fire up :mad.: Sucks too because my warranty just ended a few months ago.
This is how it was last year (about 9,000 miles less than now). I don't "crank it" like that anymore after someone telling me that doing so could cause damage on the car. Now I try for 2-3 seconds then let it go and try again.
YouTube - No ignition for '06 FX35